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/**

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* Retrieves mail-tags that have been replaced by this instance.

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* @return array List of mail-tags replaced.

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public function get_replaced_tags() {

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return $this->replaced_tags;

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}

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/**

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* Replaces mail-tags based on regexp.

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public function replace_tags() {

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$regex = '/(\[?)\[[\t ]*'

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. '([a-zA-Z_][0-9a-zA-Z:._-]*)' // [2] = name

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. '((?:[\t ]+"[^"]*"|[\t ]+\'[^\']*\')*)' // [3] = values

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. '[\t ]*\](\]?)/';

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return preg_replace_callback( $regex, $this->callback, $this->content );

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}

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/**

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* Callback function for replacement. For HTML message body.

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private function replace_tags_callback_html( $matches ) {

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return $this->replace_tags_callback( $matches, true );

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}

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/**

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* Callback function for replacement.

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private function replace_tags_callback( $matches, $html = false ) {

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// allow [[foo]] syntax for escaping a tag

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if ( $matches[1] == '['

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and $matches[4] == ']' ) {

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return substr( $matches[0], 1, -1 );

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}

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$tag = $matches[0];

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$tagname = $matches[2];

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$values = $matches[3];

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$mail_tag = new WPCF7_MailTag( $tag, $tagname, $values );

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$field_name = $mail_tag->field_name();

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$submission = WPCF7_Submission::get_instance();

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$submitted = $submission

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? $submission->get_posted_data( $field_name )

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: null;

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if ( $mail_tag->get_option( 'do_not_heat' ) ) {

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$submitted = wp_unslash( $_POST[$field_name] ?? '' );

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}

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$replaced = $submitted;

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if ( null !== $replaced ) {

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if ( $format = $mail_tag->get_option( 'format' ) ) {

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$replaced = $this->format( $replaced, $format );

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}

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$separator = ( 'body' === WPCF7_Mail::get_current_component_name() )

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? wp_get_list_item_separator()

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: ', ';

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$replaced = wpcf7_flat_join( $replaced, array(

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'separator' => $separator,

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) );

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if ( $html ) {

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$replaced = esc_html( $replaced );

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$replaced = wptexturize( $replaced );

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}

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}

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if ( $form_tag = $mail_tag->corresponding_form_tag() ) {

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$type = $form_tag->type;

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$replaced = apply_filters(

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"wpcf7_mail_tag_replaced_{$type}", $replaced,

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$submitted, $html, $mail_tag

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);

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}

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$replaced = apply_filters(

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'wpcf7_mail_tag_replaced', $replaced,

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$submitted, $html, $mail_tag

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);

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if ( null !== $replaced ) {

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$replaced = trim( $replaced );

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$this->replaced_tags[$tag] = $replaced;

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return $replaced;

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}

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$special = apply_filters( 'wpcf7_special_mail_tags', null,

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$mail_tag->tag_name(), $html, $mail_tag

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);

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if ( null !== $special ) {

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$this->replaced_tags[$tag] = $special;

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return $special;

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}

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return $tag;

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}

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/**

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* Formats string based on the formatting option in the form-tag.

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public function format( $original, $format ) {

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$original = (array) $original;

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

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if ( preg_match( '/^[0-9]{4}-[0-9]{2}-[0-9]{2}$/', $value ) ) {

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$datetime = date_create( $value, wp_timezone() );

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if ( false !== $datetime ) {

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$original[$key] = wp_date( $format, $datetime->getTimestamp() );

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}

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}

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}

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return $original;

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}

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}

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