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<?php if ( ! defined( 'ABSPATH' ) ) exit;

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/**

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* Class WPN_Helper

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* The WP Ninjas Static Helper Class

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* Provides additional helper functionality to WordPress helper functions.

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final class WPN_Helper

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{

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/**

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* @param $value

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* @return array|string

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public static function addslashes( $value )

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{

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$value = is_array($value) ?

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array_map('WPN_Helper::addslashes' , $value) :

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addslashes($value);

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return $value;

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}

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/**

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* @param $input

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* @return array|string

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public static function utf8_encode( $input ){

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if ( is_array( $input ) ) {

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return array_map( 'WPN_Helper::utf8_encode' , $input );

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} elseif ( function_exists( 'utf8_encode' ) ) {

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return static::iso8859_1_to_utf8( $input );

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} else {

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return $input;

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}

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}

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/**

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* Replace utf8_encode with mimicked functionaliy

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* Deprecated in PHP8 and removed in PHP9

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* Replacement credit: https://php.watch/versions/8.2/utf8_encode-utf8_decode-deprecated

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* and https://github.com/symfony/polyfill-php72/blob/v1.26.0/Php72.php#L32-39

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* @param string $string

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* @return string

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public static function iso8859_1_to_utf8( $s) {

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if(!is_string($s)){

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return $s;

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}

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$s .= $s;

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$len = \strlen($s);

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for ($i = $len >> 1, $j = 0; $i < $len; ++$i, ++$j) {

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switch (true) {

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case $s[$i] < "\x80": $s[$j] = $s[$i]; break;

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case $s[$i] < "\xC0": $s[$j] = "\xC2"; $s[++$j] = $s[$i]; break;

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default: $s[$j] = "\xC3"; $s[++$j] = \chr(\ord($s[$i]) - 64); break;

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}

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}

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return substr($s, 0, $j);

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}

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/**

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* @param $input

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* @return array|string

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public static function utf8_decode( $input ){

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if ( is_array( $input ) ) {

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return array_map( 'WPN_Helper::utf8_decode' , $input );

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} elseif ( function_exists( 'utf8_decode' ) ) {

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return self::utf8_to_iso8859_1( $input );

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} else {

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return $input;

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}

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}

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/**

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* Replace utf8_decode with mimicked functionaliy

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* Deprecated in PHP8 and removed in PHP9

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* Replacement credit: https://php.watch/versions/8.2/utf8_encode-utf8_decode-deprecated

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* and https://github.com/symfony/polyfill-php72/blob/v1.26.0/Php72.php#L40-69

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* @param string $string

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* @return string

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public static function utf8_to_iso8859_1( $string)

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{

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if(!is_string($string)){

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return $string;

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}

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$s = (string) $string;

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$len = \strlen($s);

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for ($i = 0, $j = 0; $i < $len; ++$i, ++$j) {

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switch ($s[$i] & "\xF0") {

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case "\xC0":

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case "\xD0":

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$c = (\ord($s[$i] & "\x1F") << 6) | \ord($s[++$i] & "\x3F");

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$s[$j] = $c < 256 ? \chr($c) : '?';

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break;

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case "\xF0":

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++$i;

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// no break

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case "\xE0":

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$s[$j] = '?';

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$i += 2;

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break;

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default:

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$s[$j] = $s[$i];

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}

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}

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return substr($s, 0, $j);

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}

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/**

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* Function to clean json data before json_decode.

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* @since 3.2

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* @param $input String

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* @return String

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public static function json_cleanup( $input ) {

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* Remove any unwated (corrupted?) characters from either side of our object.

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$l_trim = strpos( $input, '{' );

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$r_trim = strrpos( $input, '}' ) - $l_trim + 1;

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return substr( $input, $l_trim, $r_trim );

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}

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/**

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* @param $search

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* @param $replace

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* @param $subject

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* @return mixed

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public static function str_replace( $search, $replace, $subject ){

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if( is_array( $subject ) ){

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foreach( $subject as &$oneSubject )

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$oneSubject = WPN_Helper::str_replace($search, $replace, $oneSubject);

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unset($oneSubject);

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return $subject;

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} else {

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return str_replace($search, $replace, $subject);

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}

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}

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/**

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* @param $value

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* @param int $flag

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* @return array|string

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public static function html_entity_decode( $value, $flag = ENT_COMPAT ){

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$value = is_array($value) ?

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array_map( 'WPN_Helper::html_entity_decode' , $value) :

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html_entity_decode( $value, $flag );

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return $value;

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}

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/**

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* @param $value

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* @return array|string

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public static function htmlspecialchars( $value ){

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$value = is_array($value) ?

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array_map( 'WPN_Helper::htmlspecialchars' , $value) :

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htmlspecialchars( $value );

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return $value;

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}

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/**

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* @param $value

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* @return array|string

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public static function stripslashes( $value ){

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$value = is_array($value) ?

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array_map( 'WPN_Helper::stripslashes' , $value) :

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stripslashes($value);

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return $value;

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}

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/**

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* @param $value

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* @return array|string

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public static function esc_html( $value )

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{

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$value = is_array($value) ?

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array_map( 'WPN_Helper::esc_html' , $value) :

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esc_html($value);

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return $value;

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}

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/**

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* @param $value

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* @return array|string

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public static function kses_post( $value )

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{

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$value = is_array( $value ) ?

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array_map( 'WPN_Helper::kses_post' , $value ) :

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wp_kses_post($value);

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return $value;

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}

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/**

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* @param $value

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* @return array|string

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public static function strip_tags( $value )

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{

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$value = is_array( $value ) ?

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array_map( 'WPN_Helper::strip_tags' , $value ) :

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strip_tags( $value );

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return $value;

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}

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/**

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* String to Bytes

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* Converts PHP settings from a string to bytes.

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* @param $size

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* @return float

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public static function string_to_bytes( $size )

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{

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// Remove the non-unit characters from the size.

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$unit = preg_replace('/[^bkmgtpezy]/i', '', $size);

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// Remove the non-numeric characters from the size.

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$size = preg_replace('/[^0-9\.]/', '', $size);

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if ( $unit && is_array( $unit ) ) {

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// Find the position of the unit in the ordered string which is the power of magnitude to multiply a kilobyte by.

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$size *= pow( 1024, stripos( 'bkmgtpezy', $unit[0] ) );

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}

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return round($size);

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}

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public static function str_putcsv( $array, $delimiter = ',', $enclosure = '"', $terminator = "\n" ) {

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// First convert associative array to numeric indexed array

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$workArray = array();

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foreach ($array as $key => $value) {

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$workArray[] = $value;

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}

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$returnString = ''; # Initialize return string

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$arraySize = count( $workArray ); # Get size of array

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for ( $i=0; $i<$arraySize; $i++ ) {

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// Nested array, process nest item

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if ( is_array( $workArray[$i] ) ) {

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$returnString .= self::str_putcsv( $workArray[$i], $delimiter, $enclosure, $terminator );

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} else {

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switch ( gettype( $workArray[$i] ) ) {

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// Manually set some strings

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case "NULL": $_spFormat = ''; break;

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case "boolean": $_spFormat = ($workArray[$i] == true) ? 'true': 'false'; break;

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// Make sure sprintf has a good datatype to work with

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case "integer": $_spFormat = '%i'; break;

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case "double": $_spFormat = '%0.2f'; break;

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case "string": $_spFormat = '%s'; $workArray[$i] = str_replace("$enclosure", "$enclosure$enclosure", $workArray[$i]); break;

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// Unknown or invalid items for a csv - note: the datatype of array is already handled above, assuming the data is nested

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case "object":

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case "resource":

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default: $_spFormat = ''; break;

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}

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$returnString .= sprintf('%2$s'.$_spFormat.'%2$s', $workArray[$i], $enclosure);

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$returnString .= ($i < ($arraySize-1)) ? $delimiter : $terminator;

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}

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}

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// Done the workload, return the output information

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return $returnString;

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}

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public static function get_query_string( $key, $default = FALSE )

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{

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if( ! isset( $_GET[ $key ] ) ) return $default;

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$value = self::htmlspecialchars( $_GET[ $key ] );

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if( is_array( $value ) ) $value = reset( $value );

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return $value;

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}

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public static function sanitize_text_field( $data )

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{

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if( is_array( $data ) ){

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return array_map( 'WPN_Helper::sanitize_text_field' , $data );

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}

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return sanitize_text_field( $data );

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}

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public static function get_plugin_version( $plugin )

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{

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$plugins = get_plugins();

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if( ! isset( $plugins[ $plugin ] ) ) return false;

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return $plugins[ $plugin ][ 'Version' ];

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}

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public static function is_func_disabled( $function )

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{

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if( ! function_exists( $function ) ) return true;

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$disabled = explode( ',', ini_get( 'disable_functions' ) );

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return in_array( $function, $disabled );

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}

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public static function maybe_unserialize( $original )

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{

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// Repalcement for https://codex.wordpress.org/Function_Reference/maybe_unserialize

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if ( is_serialized( $original ) ){

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// Ported with php5.2 support from https://magp.ie/2014/08/13/php-unserialize-string-after-non-utf8-characters-stripped-out/

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$parsed = preg_replace_callback( '!s:(\d+):"(.*?)";!s', 'WPN_Helper::parse_utf8_serialized' , $original );

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$parsed = @unserialize( $parsed );

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return ( $parsed ) ? $parsed : unserialize( $original ); // Fallback if parse error.

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}

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return $original;

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}

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/**

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* Function to fetch our cache from the upgrades table (if it exists there).

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* @param $id (int) The form ID.

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* @since 3.3.7

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public static function get_nf_cache( $id ) {

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// See if we have the data in our table already.

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global $wpdb;

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$sql = "SELECT cache FROM `{$wpdb->prefix}nf3_upgrades` WHERE id = " . intval( $id );

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$result = $wpdb->get_results( $sql, 'ARRAY_A' );

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// If so...

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if ( ! empty( $result ) ) {

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// Unserialize the result.

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$value = WPN_Helper::maybe_unserialize( $result[ 0 ][ 'cache' ] );

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// Return it.

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return $value;

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} // Otherwise... (We don't have the data.)

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else {

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// Get it from the options table.

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return get_option( 'nf_form_' . $id );

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}

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}

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/**

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* Function to insert or update our cache in the upgrades table (if it exists).

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* @param $id (int) The form ID.

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* @param $data (string) The form cache.

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* @param $stage (int) The target stage of this update. Default to the current max stage.

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* @since 3.3.7

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* @updated 3.4.0

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public static function update_nf_cache( $id, $data, $stage = 0 ) {

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$stage = ( $stage ) ? $stage : WPN_Helper::get_stage();

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// Serialize our data.

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$cache = serialize( $data );

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global $wpdb;

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// See if we've already got a record.

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$sql = "SELECT id FROM `{$wpdb->prefix}nf3_upgrades` WHERE id = " . intval( $id );

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$result = $wpdb->get_results( $sql, 'ARRAY_A' );

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// If we don't already have the data...

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if ( empty( $result ) ) {

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// Insert it.

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$sql = $wpdb->prepare( "INSERT INTO `{$wpdb->prefix}nf3_upgrades` (id, cache, stage) VALUES (%d, %s, %s)", intval( $id ), $cache, intval( $stage ) );

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} // Otherwise... (We do have the data.)

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else {

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// Update the existing record.

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$sql = $wpdb->prepare( "UPDATE `{$wpdb->prefix}nf3_upgrades` SET cache = %s, stage = %d WHERE id = %d", $cache, intval( $stage ), intval( $id ) );

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}

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$wpdb->query( $sql );

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}

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/**

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* Function to retrieve our upgrade stage.

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* Remove this after the cache has been resolved.

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* @return int

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* @since 3.4.0

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public static function get_stage() {

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$ver = Ninja_Forms::$db_version;

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$stack = explode( '.', $ver );

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return intval( array_pop( $stack ) );

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}

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/**

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* Function to build our form cache from the table.

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* @param $id (int) The form ID.

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* @since 3.3.18

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* @return $form_cache Array of form data.

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* @updated 3.4.0

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public static function build_nf_cache( $id ) {

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$form = Ninja_Forms()->form( $id )->get();

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$form_cache = array(

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'id' => $id,

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'fields' => array(),

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'actions' => array(),

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'settings' => $form->get_settings(),

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);

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$fields = Ninja_Forms()->form( $id )->get_fields();

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foreach( $fields as $field ){

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// If the field is set.

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if ( ! is_null( $field ) && ! empty( $field ) ) {

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array_push( $form_cache[ 'fields' ], array( 'settings' => $field->get_settings(), 'id' => $field->get_id() ) );

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}

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}

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$actions = Ninja_Forms()->form( $id )->get_actions();

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foreach( $actions as $action ){

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// If the action is set.

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if ( ! is_null( $action ) && ! empty( $action ) ) {

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array_push( $form_cache[ 'actions' ], array( 'settings' => $action->get_settings(), 'id' => $action->get_id() ) );

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}

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}

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WPN_Helper::update_nf_cache( $id, $form_cache );

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return $form_cache;

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}

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/**

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* Function to delete our cache.

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* @param $id (int) The form ID.

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* @since 3.3.7

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public static function delete_nf_cache( $id ) {

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global $wpdb;

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$sql = "DELETE FROM `{$wpdb->prefix}nf3_upgrades` WHERE id = " . intval( $id );

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$wpdb->query( $sql );

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delete_option( 'nf_form_' . intval( $id ) );

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}

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private static function parse_utf8_serialized( $matches )

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{

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if ( isset( $matches[2] ) ){

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return 's:'.strlen($matches[2]).':"'.$matches[2].'";';

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}

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}

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/**

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* This funtion gets/creates the Ninja Forms gate keeper( a random integer

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* between 1 and 100 ). We will use this number when deciding whether a

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* particular install is eligible for an upgrade or whatever else we decide

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* to use it for

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* @return int $zuul

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* @since 3.4.0

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public static function get_zuul() {

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$zuul = get_option( 'ninja_forms_zuul', -1 );

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if( -1 === $zuul ) {

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$zuul = rand( 1, 100 );

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update_option( 'ninja_forms_zuul', $zuul, false );

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}

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return $zuul;

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}

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/**

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* This function will return true/false based on an option( ninja_forms_zuul )

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* and a threshold that we set. We can use this to limit updates

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* @param $threshold

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* @return bool

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* @since 3.4.0

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