<?php

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/**

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* Helpers class.

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*

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* @package Smush\Core

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* @version 1.0

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*

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* @author Umesh Kumar <umesh@incsub.com>

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*

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* @copyright (c) 2017, Incsub (http://incsub.com)

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*/

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namespace Smush\Core;

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use finfo;

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use Smush\Core\Media\Media_Item_Cache;

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use Smush\Core\Media\Media_Item_Stats;

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use Smush\Core\Png2Jpg\Png2Jpg_Optimization;

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use WP_Smush;

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use WDEV_Logger;

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if ( ! defined( 'WPINC' ) ) {

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die;

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}

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/**

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* Class Helper

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*/

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class Helper {

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/**

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* Temporary cache.

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*

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* We use this instead of WP_Object_Cache to avoid save data to memory cache (persistent caching).

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*

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* And to avoid it take memory space, we also reset the group cache each we get a new key,

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* it means one group only has one key.

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* It's useful when we want to save result a function.

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*

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* Leave group is null to set and get the value by unique key.

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*

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* It's useful to avoid checking something multiple times.

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*

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* @since 3.9.6

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*

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* @var array

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*/

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private static $temp_cache = array();

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/**

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* WPMUDEV Logger lib.

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*

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* @access private

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*

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* @var null|WDEV_Logger

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*/

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private static $logger;

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/**

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* Get WDEV_Logger instance.

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*

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* @return WDEV_Logger

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*/

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public static function logger() {

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if ( null === self::$logger ) {

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$swiched_blog = false;

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// On MU site, move all log files into the log folder [wp-content/uploads/smush] on the main site.

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if ( is_multisite() && ! is_main_site() ) {

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switch_to_blog( get_main_site_id() );

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$swiched_blog = true;

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}

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$upload_dir = wp_get_upload_dir();

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$log_dir = 'smush';

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if ( false !== strpos( $upload_dir['basedir'], WP_CONTENT_DIR ) ) {

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$log_dir = str_replace( trailingslashit( WP_CONTENT_DIR ), '', $upload_dir['basedir'] ) . '/smush';

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}

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if ( $swiched_blog ) {

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restore_current_blog();

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}

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self::$logger = WDEV_Logger::create(

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array(

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'log_dir' => $log_dir,

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'is_private' => true,

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'modules' => array(

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'smush' => array(

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'is_global_module' => true,

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),

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'cdn' => array(),

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'lazy' => array(),

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'webp' => array(),

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'png2jpg' => array(),

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'resize' => array(),

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'dir' => array(),

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'backup' => array(),

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'api' => array(),

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'integrations' => array(),

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'track' => array(),

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),

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)

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);

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}

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return self::$logger;

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}

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/**

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* Clean file path.

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*

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* @param string $file File path.

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* @return string

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*/

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public static function clean_file_path( $file ) {

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return str_replace( WP_CONTENT_DIR, '', $file );

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}

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/**

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* Get value from temporary cache.

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*

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* @param string $key Key name.

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* @param string|null $group Group name.

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* @param mixed $default Default value, default is NULL.

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*

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* Uses:

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* if( null !== Helper::cache_get( 'your_key', 'your_group' ) ){

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* // Do your something with temporary cache value.

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* }

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* // Maybe setting it with Helper::cache_set.

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*

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* @since 3.9.6

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*

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* @return mixed The cached result.

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*/

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public static function cache_get( $key, $group = null, $default = null ) {

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// Add current blog id to support MU site.

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$current_blog_id = get_current_blog_id();

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// Get cache for current blog.

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$temp_cache = array();

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if ( isset( self::$temp_cache[ $current_blog_id ] ) ) {

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$temp_cache = self::$temp_cache[ $current_blog_id ];

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}

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/**

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* Add a filter to force cache.

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* It might be helpful when we debug.

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*/

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if ( apply_filters( 'wp_smush_force_cache', false, $key, $group, $temp_cache ) ) {

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$locked_groups = array(

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// Required for cache png2jpg()->can_be_converted() before resizing.

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'png2jpg_can_be_converted',

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// Required for cache unique file name of png2jpg()->convert_to_jpg().

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'convert_to_jpg',

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);

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if ( ! in_array( $group, $locked_groups, true ) ) {

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return null;

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}

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}

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$value = $default;

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if ( isset( $group ) ) {

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if ( isset( $temp_cache[ $group ][ $key ] ) ) {

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$value = $temp_cache[ $group ][ $key ];

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} elseif ( isset( $temp_cache[ $group ] ) ) {

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// Get a new key, reset group.

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unset( $temp_cache[ $group ] );

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}

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} elseif ( isset( $temp_cache[ $key ] ) ) {

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// Get the value by key.

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$value = $temp_cache[ $key ];

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}

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return $value;

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}

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/**

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* Save value to temporary cache.

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*

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* @since 3.9.6

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*

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* @param string $key Key name.

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* @param mixed $value Data to cache.

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* @param string|null $group Group name.

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*

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* Note, we return the provided value to use it inside some methods.

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* @return mixed Returns the provided value.

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*/

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public static function cache_set( $key, $value, $group = null ) {

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// Add current blog id to support MU site.

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$current_blog_id = get_current_blog_id();

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if ( isset( $group ) ) {

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// Reset group and set the value.

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self::$temp_cache[ $current_blog_id ][ $group ] = array( $key => $value );

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} else {

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// Save value by unique key.

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self::$temp_cache[ $current_blog_id ][ $key ] = $value;

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}

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return $value;

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}

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/**

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* Clear cache by group or key.

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*

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* @since 3.9.6

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*

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* @param string $cache_key Group name or unique key name.

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*/

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public static function cache_delete( $cache_key ) {

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// Add current blog id to support MU site.

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$current_blog_id = get_current_blog_id();

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// Delete temp cache by cache key.

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if ( isset( $cache_key, self::$temp_cache[ $current_blog_id ][ $cache_key ] ) ) {

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unset( self::$temp_cache[ $current_blog_id ][ $cache_key ] );

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}

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return true;

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}

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/**

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* Get mime type for file.

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*

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* @since 3.1.0 Moved here as a helper function.

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*

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* @param string $path Image path.

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*

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* @return bool|string

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*/

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public static function get_mime_type( $path ) {

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// These mime functions only work on local files/streams.

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if ( ! stream_is_local( $path ) ) {

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return false;

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}

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// Get the File mime.

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if ( class_exists( 'finfo' ) ) {

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$file_info = new finfo( FILEINFO_MIME_TYPE );

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} else {

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$file_info = false;

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}

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if ( $file_info ) {

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$mime = file_exists( $path ) ? $file_info->file( $path ) : '';

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} elseif ( function_exists( 'mime_content_type' ) ) {

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$mime = mime_content_type( $path );

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} else {

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$mime = false;

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}

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return $mime;

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}

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/**

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* Filter the Posts object as per mime type.

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*

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* @param array $posts Object of Posts.

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*

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* @return array Array of post IDs.

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*/

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public static function filter_by_mime( $posts ) {

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if ( empty( $posts ) ) {

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return $posts;

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}

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foreach ( $posts as $post_k => $post ) {

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if ( ! isset( $post->post_mime_type ) || ! in_array( $post->post_mime_type, Core::$mime_types, true ) ) {

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unset( $posts[ $post_k ] );

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} else {

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$posts[ $post_k ] = $post->ID;

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}

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}

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return $posts;

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}

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/**

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* Iterate over PNG->JPG Savings to return cummulative savings for an image

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*

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* @param string $attachment_id Attachment ID.

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*

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* @return array

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*/

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public static function get_pngjpg_savings( $attachment_id = '' ) {

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$media_item = Media_Item_Cache::get_instance()->get( $attachment_id );

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$png2jpg_optimization = new Png2Jpg_Optimization( $media_item );

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$stats = $png2jpg_optimization->is_optimized()

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? $png2jpg_optimization->get_stats() :

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new Media_Item_Stats();

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return $stats->to_array();

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}

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/**

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* Get the link to the media library page for the image.

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*

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* @since 2.9.0

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*

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* @param int $id Image ID.

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* @param string $name Image file name.

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* @param bool $src Return only src. Default - return link.

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*

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* @return string

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*/

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public static function get_image_media_link( $id, $name, $src = false ) {

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$mode = get_user_option( 'media_library_mode' );

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if ( 'grid' === $mode ) {

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$link = admin_url( "upload.php?item=$id" );

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} else {

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$link = admin_url( "post.php?post=$id&action=edit" );

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}

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if ( ! $src ) {

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return "<a href='$link'>$name</a>";

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}

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return $link;

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}

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/**

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* Returns current user name to be displayed

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*

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* @return string

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*/

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public static function get_user_name() {

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$current_user = wp_get_current_user();

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return ! empty( $current_user->first_name ) ? $current_user->first_name : $current_user->display_name;

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}

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/**

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* Allows to filter the error message sent to the user

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*

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* @param string $error Error message.

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* @param string $attachment_id Attachment ID.

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*

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* @return mixed|null|string

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*/

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public static function filter_error( $error = '', $attachment_id = '' ) {

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if ( empty( $error ) ) {

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return null;

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}

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/**

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* Replace the 500 server error with a more appropriate error message.

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*/

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if ( false !== strpos( $error, '500 Internal Server Error' ) ) {

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$error = esc_html__( "Couldn't process image due to bad headers. Try re-saving the image in an image editor, then upload it again.", 'wp-smushit' );

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} elseif ( strpos( $error, 'timed out' ) ) {

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$error = esc_html__( "Timeout error. You can increase the request timeout to make sure Smush has enough time to process larger files. `define('WP_SMUSH_TIMEOUT', 150);`", 'wp-smushit' );

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}

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/**

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* Used internally to modify the error message

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*/

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return apply_filters( 'wp_smush_error', $error, $attachment_id );

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}

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/**

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* Format metadata from $_POST request.

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*

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* Post request in WordPress will convert all values

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* to string. Make sure image height and width are int.

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* This is required only when Async requests are used.

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* See - https://wordpress.org/support/topic/smushit-overwrites-image-meta-crop-sizes-as-string-instead-of-int/

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*

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* @since 2.8.0

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*

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* @param array $meta Metadata of attachment.

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*

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* @return array

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*/

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public static function format_meta_from_post( $meta = array() ) {

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// Do not continue in case meta is empty.

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if ( empty( $meta ) ) {

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return $meta;

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}

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// If metadata is array proceed.

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if ( is_array( $meta ) ) {

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// Walk through each items and format.

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array_walk_recursive( $meta, array( self::class, 'format_attachment_meta_item' ) );

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}

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return $meta;

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}

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/**

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* If current item is width or height, make sure it is int.

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*

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* @since 2.8.0

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*

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* @param mixed $value Meta item value.

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* @param string $key Meta item key.

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*/

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public static function format_attachment_meta_item( &$value, $key ) {

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if ( 'height' === $key || 'width' === $key ) {

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$value = (int) $value;

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}

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/**

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* Allows to format single item in meta.

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*

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* This filter will be used only for Async, post requests.

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*

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* @param mixed $value Meta item value.

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* @param string $key Meta item key.

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*/

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$value = apply_filters( 'wp_smush_format_attachment_meta_item', $value, $key );

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}

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/**

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* Check to see if file is animated.

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*

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* @since 3.0 Moved from class-resize.php

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* @since 3.9.6 Add a new param $mime_type.

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*

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* @param string $file_path Image file path.

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* @param int $id Attachment ID.

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* @param false|string $mime_type Mime type.

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*

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* @return bool|int

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*/

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public static function check_animated_status( $file_path, $id, $mime_type = false ) {

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$media_item = Media_Item_Cache::get_instance()->get( $id );

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return $media_item->is_animated();

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}

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public static function check_animated_file_contents( $file_path ) {

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$filecontents = file_get_contents( $file_path ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents

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$str_loc = 0;

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$count = 0;

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// There is no point in continuing after we find a 2nd frame.

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while ( $count < 2 ) {

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$where1 = strpos( $filecontents, "\x00\x21\xF9\x04", $str_loc );

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if ( false === $where1 ) {

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break;

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} else {

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$str_loc = $where1 + 1;

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$where2 = strpos( $filecontents, "\x00\x2C", $str_loc );

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if ( false === $where2 ) {

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break;

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} else {

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if ( $where2 === $where1 + 8 ) {

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$count ++;

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}

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$str_loc = $where2 + 1;

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}

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}

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}

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return $count > 1;

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}

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/**

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* Verify the file size limit.

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*

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* @param int $attachment_id Attachment ID.

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*

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* Note: We only use this method to verify an image before smushing it,

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* we still need to verify the file size of every thumbnail files while smushing them.

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*

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* @return bool|int Return the file size if the size limit is exceeded, otherwise return FALSE.

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*/

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public static function size_limit_exceeded( $attachment_id ) {

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$original_file_path = self::get_attached_file( $attachment_id, 'original' );

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if ( ! file_exists( $original_file_path ) ) {

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$original_file_path = self::get_attached_file( $attachment_id );

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}

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if ( ! file_exists( $original_file_path ) ) {

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return false;

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}

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$max_file_size = WP_Smush::is_pro() ? WP_SMUSH_PREMIUM_MAX_BYTES : WP_SMUSH_MAX_BYTES;

[477] Fix | Delete

$file_size = filesize( $original_file_path );

[478] Fix | Delete

[479] Fix | Delete

return $file_size > $max_file_size ? $file_size : false;

[480] Fix | Delete

}

[481] Fix | Delete

[482] Fix | Delete

/**

[483] Fix | Delete

* Original File path

[484] Fix | Delete

*

[485] Fix | Delete

* @param string $original_file Original file.

[486] Fix | Delete

*

[487] Fix | Delete

* @return string File Path

[488] Fix | Delete

*/

[489] Fix | Delete

public static function original_file( $original_file = '' ) {

[490] Fix | Delete

$uploads = wp_get_upload_dir();

[491] Fix | Delete

$upload_path = $uploads['basedir'];

[492] Fix | Delete

[493] Fix | Delete

return path_join( $upload_path, $original_file );

[494] Fix | Delete

}

[495] Fix | Delete

[496] Fix | Delete

/**

[497] Fix | Delete

* Gets the WPMU DEV API key.

[498] Fix | Delete

*

[499] Fix | Delete