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/**

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* Replace 3rd-party form provider tags/shortcodes with our own Smart Tags.

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* @since 1.6.6

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* @param string $string Text to look for Smart Tags in.

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* @param array $fields List of fields to process Smart Tags in.

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* @return string

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public function get_smarttags( $string, $fields ) {

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preg_match_all( '/\{(.+?)\}/', $string, $tags );

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if ( empty( $tags[1] ) ) {

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return $string;

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}

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foreach ( $tags[1] as $tag ) {

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$tag_formatted = str_replace( 'field:', '', $tag );

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foreach ( $fields as $field ) {

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if ( ! empty( $field['nf_key'] ) && $field['nf_key'] === $tag_formatted ) {

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$string = str_replace( '{' . $tag . '}', '{field_id="' . $field['id'] . '"}', $string );

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}

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}

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if ( in_array( $tag, [ 'wp:admin_email', 'system:admin_email' ], true ) ) {

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$string = str_replace( [ '{wp:admin_email}', '{system:admin_email}' ], '{admin_email}', $string );

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}

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if ( $tag === 'all_fields_table' || $tag === 'fields_table' ) {

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$string = str_replace( '{' . $tag . '}', '{all_fields}', $string );

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}

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}

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return $string;

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}

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}

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