Compilation failed: invalid range in character class at offset 12 [closed] - php

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My WordPress website has a Warning on a grid article saying:
preg_match(): Compilation failed: invalid range in character class at offset 12 in wp-content/plugins/js_composer/include/classes/shortcodes/vc-basic-grid.php on line 177
<?php
if ( ! defined( 'ABSPATH' ) ) {
die( '-1' );
}
require_once vc_path_dir( 'SHORTCODES_DIR', 'paginator/class-vc-pageable.php' );
require_once vc_path_dir( 'SHORTCODES_DIR', 'vc-btn.php' );
class WPBakeryShortCode_VC_Basic_Grid extends WPBakeryShortCode_Vc_Pageable {
public $pagable_type = 'grid';
public $items = array();
public static $excluded_ids = array();
protected $element_template = '';
protected static $default_max_items = 1000;
public $post_id = false;
protected $filter_terms;
public $attributes_defaults = array(
'initial_loading_animation' => 'zoomIn',
'full_width' => '',
'layout' => '',
'element_width' => '4',
'items_per_page' => '5',
'gap' => '',
'style' => 'all',
'show_filter' => '',
'filter_default_title' => 'all',
'exclude_filter' => '',
'filter_style' => '',
'filter_size' => 'md',
'filter_align' => '',
'filter_color' => '',
'arrows_design' => '',
'arrows_position' => '',
'arrows_color' => '',
'paging_design' => '',
'paging_color' => '',
'paging_animation_in' => '',
'paging_animation_out' => '',
'loop' => '',
'autoplay' => '',
'post_type' => 'post',
'filter_source' => 'category',
'orderby' => '',
'order' => 'DESC',
'meta_key' => '',
'max_items' => '10',
'offset' => '0',
'taxonomies' => '',
'custom_query' => '',
'data_type' => 'query',
'include' => '',
'exclude' => '',
'item' => 'none',
'grid_id' => '',
// disabled, needed for-BC:
'button_style' => '',
'button_color' => '',
'button_size' => '',
// New button3:
'btn_title' => '',
'btn_style' => 'modern',
'btn_el_id' => '',
'btn_custom_background' => '#ededed',
'btn_custom_text' => '#666',
'btn_outline_custom_color' => '#666',
'btn_outline_custom_hover_background' => '#666',
'btn_outline_custom_hover_text' => '#fff',
'btn_shape' => 'rounded',
'btn_color' => 'blue',
'btn_size' => 'md',
'btn_align' => 'inline',
'btn_button_block' => '',
'btn_add_icon' => '',
'btn_i_align' => 'left',
'btn_i_type' => 'fontawesome',
'btn_i_icon_fontawesome' => 'fa fa-adjust',
'btn_i_icon_openiconic' => 'vc-oi vc-oi-dial',
'btn_i_icon_typicons' => 'typcn typcn-adjust-brightness',
'btn_i_icon_entypo' => 'entypo-icon entypo-icon-note',
'btn_i_icon_linecons' => 'vc_li vc_li-heart',
'btn_i_icon_pixelicons' => 'vc_pixel_icon vc_pixel_icon-alert',
'btn_custom_onclick' => '',
'btn_custom_onclick_code' => '',
// fix template
'page_id' => '',
);
protected $grid_settings = array();
protected $grid_id_unique_name = 'vc_gid'; // if you change this also change in hook-vc-grid.php
function __construct( $settings ) {
parent::__construct( $settings );
$this->attributes_defaults['btn_title'] = __( 'Load more', 'js_composer' );
$this->shortcodeScripts();
}
public function shortcodeScripts() {
parent::shortcodeScripts();
wp_register_script( 'vc_grid-js-imagesloaded', vc_asset_url( 'lib/bower/imagesloaded/imagesloaded.pkgd.min.js' ) );
wp_register_script( 'vc_grid', vc_asset_url( 'js/dist/vc_grid.min.js' ), array(
'jquery',
'underscore',
'vc_pageable_owl-carousel',
'waypoints',
//'isotope',
'vc_grid-js-imagesloaded',
), WPB_VC_VERSION, true );
}
public function enqueueScripts() {
parent::enqueueScripts();
wp_enqueue_script( 'vc_grid-js-imagesloaded' );
wp_enqueue_script( 'vc_grid' );
}
public static function addExcludedId( $id ) {
self::$excluded_ids[] = $id;
}
public static function excludedIds() {
return self::$excluded_ids;
}
/**
* Get shortcode hash by it content and attributes
*
* #param $atts
* #param $content
*
* #deprecated 4.4.3
* #return string
*/
public function getHash( $atts, $content ) {
if ( vc_is_page_editable() || is_preview() ) {
_deprecated_function( 'WPBakeryShortCode_VC_Basic_Grid::getHash', '4.4.3 (will be removed in 4.10)', 'getId resave your grid' );
/* We are in Frontend editor
* We need to send RAW shortcode data, so hash is just json_encode of atts and content
*/
return urlencode( json_encode( array(
'tag' => $this->shortcode,
'atts' => $atts,
'content' => $content,
) ) );
}
/** Else
* We are in preview mode (viewing page).
* So hash is shortcode atts and content hash
*/
return sha1( serialize( array(
'tag' => $this->shortcode,
'atts' => $atts,
'content' => $content,
) ) );
}
public function getId( $atts, $content ) {
if ( vc_is_page_editable() || is_preview() ) {
/* We are in Frontend editor
* We need to send RAW shortcode data, so hash is just json_encode of atts and content
*/
return urlencode( json_encode( array(
'tag' => $this->shortcode,
'atts' => $atts,
'content' => $content,
) ) );
}
$id_pattern = '/' . $this->grid_id_unique_name . '\:([\w\_-]+)/';
$id_value = isset( $atts['grid_id'] ) ? $atts['grid_id'] : '';
preg_match( $id_pattern, $id_value, $id_matches );
$id_to_save = json_encode( array( 'failed_to_get_id' => esc_attr( $id_value ) ) );
if ( ! empty( $id_matches ) ) {
$id_to_save = $id_matches[1];
}
return $id_to_save;
}
/**
* Search in post meta vc_post_settings value
* For shortcode data by hash
*
* #param $page_id
* #param $hash
*
* #deprecated 4.4.3
* #return bool|array
*/
public function findPostShortcodeByHash( $page_id, $hash ) {
_deprecated_function( 'WPBakeryShortCode_VC_Basic_Grid::findPostShortcodeByHash', '4.4.3 (will be removed in 5.3)', 'findPostShortcodeById resave your grid to renew' );
if ( $hash ) {
if ( $this->currentUserCanManage( $page_id ) && preg_match( '/\"tag\"\:/', urldecode( $hash ) ) ) {
return json_decode( urldecode( $hash ), true ); // if frontend, no hash exists - just RAW data
}
$post_meta = get_post_meta( (int) $page_id, '_vc_post_settings' );
if ( is_array( $post_meta ) ) {
foreach ( $post_meta as $meta ) {
if ( isset( $meta['vc_grid'] ) && ! empty( $meta['vc_grid']['shortcodes'] ) && isset( $meta['vc_grid']['shortcodes'][ $hash ] ) ) {
return $meta['vc_grid']['shortcodes'][ $hash ];
}
}
}
}
return false;
}
public function findPostShortcodeById( $page_id, $grid_id ) {
if ( $this->currentUserCanManage( $page_id ) && preg_match( '/\"tag\"\:/', urldecode( $grid_id ) ) ) {
return json_decode( urldecode( $grid_id ), true ); // if frontend, no hash exists - just RAW data
}
$post_meta = get_post_meta( (int) $page_id, '_vc_post_settings' );
if ( is_array( $post_meta ) ) {
foreach ( $post_meta as $meta ) {
if ( isset( $meta['vc_grid_id'] ) && ! empty( $meta['vc_grid_id']['shortcodes'] ) && isset( $meta['vc_grid_id']['shortcodes'][ $grid_id ] ) ) {
return $meta['vc_grid_id']['shortcodes'][ $grid_id ];
}
}
}
return false;
}
private function renderItems() {
$output = $items = '';
$this->buildGridSettings();
$atts = $this->atts;
$settings = $this->grid_settings;
$filter_terms = $this->filter_terms;
$is_end = isset( $this->is_end ) && $this->is_end;
$css_classes = 'vc_grid vc_row' . esc_attr( $atts['gap'] > 0 ? ' vc_grid-gutter-' . (int) $atts['gap'] . 'px' : '' );
if ( is_array( $this->items ) && ! empty( $this->items ) ) {
require_once vc_path_dir( 'PARAMS_DIR', 'vc_grid_item/class-vc-grid-item.php' );
$grid_item = new Vc_Grid_Item();
$grid_item->setGridAttributes( $atts );
$grid_item->setIsEnd( $is_end );
$grid_item->setTemplateById( $atts['item'] );
$output .= $grid_item->addShortcodesCustomCss();
ob_start();
wp_print_styles();
$output .= ob_get_clean();
$attributes = array(
'filter_terms' => $filter_terms,
'atts' => $atts,
'grid_item',
$grid_item,
);
$output .= apply_filters( 'vc_basic_grid_template_filter', vc_get_template( 'shortcodes/vc_basic_grid_filter.php', $attributes ), $attributes );
while ( have_posts() ) {
the_post();
$items .= $grid_item->renderItem( get_post() );
}
wp_reset_postdata();
}
$items = apply_filters( $this->shortcode . '_items_list', $items );
$output .= $this->renderPagination( $atts['style'], $settings, $items, $css_classes );
return $output;
}
public function setContentLimits() {
$atts = $this->atts;
if ( 'ids' === $this->atts['post_type'] ) {
$this->atts['max_items'] = 0;
$this->atts['offset'] = 0;
$this->atts['items_per_page'] = apply_filters( 'vc_basic_grid_max_items', self::$default_max_items );
} else {
$this->atts['offset'] = $offset = isset( $atts['offset'] ) ? (int) $atts['offset'] : $this->attributes_defaults['offset'];
$this->atts['max_items'] = isset( $atts['max_items'] ) ? (int) $atts['max_items'] : (int) $this->attributes_defaults['max_items'];
$this->atts['items_per_page'] = ! isset( $atts['items_per_page'] ) ? (int) $this->attributes_defaults['items_per_page'] : (int) $atts['items_per_page'];
if ( $this->atts['max_items'] < 1 ) {
$this->atts['max_items'] = apply_filters( 'vc_basic_grid_max_items', self::$default_max_items );
}
}
$this->setPagingAll( $this->atts['max_items'] );
}
protected function setPagingAll( $max_items ) {
$atts = $this->atts;
$this->atts['items_per_page'] = $this->atts['query_items_per_page'] = $max_items > 0 ? $max_items : apply_filters( 'vc_basic_grid_items_per_page_all_max_items', self::$default_max_items );
$this->atts['query_offset'] = isset( $atts['offset'] ) ? (int) $atts['offset'] : $this->attributes_defaults['offset'];
}
public function renderAjax( $vc_request_param ) {
$this->items = array(); // clear this items array (if used more than once);
$id = isset( $vc_request_param['shortcode_id'] ) ? $vc_request_param['shortcode_id'] : false;
if ( ! isset( $vc_request_param['page_id'] ) ) {
return json_encode( array( 'status' => 'Nothing found' ) );
}
if ( $id ) {
$shortcode = $this->findPostShortcodeById( $vc_request_param['page_id'], $id );
} else {
/**
* #deprecated since 4.4.3 due to invalid logic in hash algorithm
*/
$hash = isset( $vc_request_param['shortcode_hash'] ) ? $vc_request_param['shortcode_hash'] : false;
$shortcode = $this->findPostShortcodeByHash( $vc_request_param['page_id'], $hash );
}
if ( ! is_array( $shortcode ) ) {
return json_encode( array( 'status' => 'Nothing found' ) );
}
visual_composer()->registerAdminCss();
visual_composer()->registerAdminJavascript();
// Set post id
$this->post_id = (int) $vc_request_param['page_id'];
$shortcode_atts = $shortcode['atts'];
$this->shortcode_content = $shortcode['content'];
$this->buildAtts( $shortcode_atts, $shortcode['content'] );
$this->buildItems();
return $this->renderItems();
}
public function postID() {
if ( false == $this->post_id ) {
$this->post_id = get_the_ID();
}
return $this->post_id;
}
public function buildAtts( $atts, $content ) {
$arr_keys = array_keys( $atts );
for ( $i = 0; $i < count( $atts ); $i ++ ) {
$atts[ $arr_keys[ $i ] ] = html_entity_decode( $atts[ $arr_keys[ $i ] ], ENT_QUOTES, 'utf-8' );
}
if ( isset( $atts['grid_id'] ) && ! empty( $atts['grid_id'] ) ) {
$id_to_save = $this->getId( $atts, $content );
} else {
$hash = $this->getHash( $atts, $content );
}
$atts = $this->convertButton2ToButton3( $atts );
$atts = shortcode_atts( $this->attributes_defaults, vc_map_get_attributes( $this->getShortcode(), $atts ) );
$this->atts = $atts;
if ( isset( $id_to_save ) ) {
$this->atts['shortcode_id'] = $id_to_save;
} else if ( isset( $hash ) ) {
$this->atts['shortcode_hash'] = $hash;
}
$this->atts['page_id'] = $this->postID();
$this->element_template = $content;
// #since 4.4.3
if ( 'custom' === $this->attr( 'post_type' ) ) {
$this->atts['style'] = 'all';
}
}
/**
* Getter attribute.
*
* #param $key
*
* #return mixed|null
*/
public function attr( $key ) {
return isset( $this->atts[ $key ] ) ? $this->atts[ $key ] : null;
}
public function buildGridSettings() {
$this->grid_settings = array(
'page_id' => $this->atts['page_id'],
// used in basic grid for initialization
'style' => $this->atts['style'],
'action' => 'vc_get_vc_grid_data',
);
// used in ajax request for items
if ( isset( $this->atts['shortcode_id'] ) && ! empty( $this->atts['shortcode_id'] ) ) {
$this->grid_settings['shortcode_id'] = $this->atts['shortcode_id'];
} elseif ( isset( $this->atts['shortcode_hash'] ) && ! empty( $this->atts['shortcode_hash'] ) ) {
// #deprecated since 4.4.3
$this->grid_settings['shortcode_hash'] = $this->atts['shortcode_hash'];
}
if ( 'load-more' === $this->atts['style'] ) {
$this->grid_settings = array_merge( $this->grid_settings, array(
// used in dispaly style load more button, lazy, pagination
'items_per_page' => $this->atts['items_per_page'],
'btn_data' => vc_map_integrate_parse_atts( $this->shortcode, 'vc_btn', $this->atts, 'btn' . '_' ),
) );
} elseif ( 'lazy' === $this->atts['style'] ) {
$this->grid_settings = array_merge( $this->grid_settings, array(
'items_per_page' => $this->atts['items_per_page'],
) );
} elseif ( 'pagination' === $this->atts['style'] ) {
$this->grid_settings = array_merge( $this->grid_settings, array(
'items_per_page' => $this->atts['items_per_page'],
// used in pagination style
'auto_play' => $this->atts['autoplay'] > 0 ? true : false,
'gap' => (int) $this->atts['gap'],
// not used yet, but can be used in isotope..
'speed' => (int) $this->atts['autoplay'] * 1000,
'loop' => $this->atts['loop'],
'animation_in' => $this->atts['paging_animation_in'],
'animation_out' => $this->atts['paging_animation_out'],
'arrows_design' => $this->atts['arrows_design'],
'arrows_color' => $this->atts['arrows_color'],
'arrows_position' => $this->atts['arrows_position'],
'paging_design' => $this->atts['paging_design'],
'paging_color' => $this->atts['paging_color'],
) );
}
$this->grid_settings['tag'] = $this->shortcode;
}
// TODO: setter & getter to attributes
public function buildQuery( $atts ) {
// Set include & exclude
if ( 'ids' !== $atts['post_type'] && ! empty( $atts['exclude'] ) ) {
$atts['exclude'] .= ',' . implode( ',', $this->excludedIds() );
} else {
$atts['exclude'] = implode( ',', $this->excludedIds() );
}
if ( 'ids' !== $atts['post_type'] ) {
$settings = array(
'posts_per_page' => $atts['query_items_per_page'],
'offset' => $atts['query_offset'],
'orderby' => $atts['orderby'],
'order' => $atts['order'],
'meta_key' => in_array( $atts['orderby'], array(
'meta_value',
'meta_value_num',
) ) ? $atts['meta_key'] : '',
'post_type' => $atts['post_type'],
'exclude' => $atts['exclude'],
);
if ( ! empty( $atts['taxonomies'] ) ) {
$vc_taxonomies_types = get_taxonomies( array( 'public' => true ) );
$terms = get_terms( array_keys( $vc_taxonomies_types ), array(
'hide_empty' => false,
'include' => $atts['taxonomies'],
) );
$settings['tax_query'] = array();
$tax_queries = array(); // List of taxnonimes
foreach ( $terms as $t ) {
if ( ! isset( $tax_queries[ $t->taxonomy ] ) ) {
$tax_queries[ $t->taxonomy ] = array(
'taxonomy' => $t->taxonomy,
'field' => 'id',
'terms' => array( $t->term_id ),
'relation' => 'IN',
);
} else {
$tax_queries[ $t->taxonomy ]['terms'][] = $t->term_id;
}
}
$settings['tax_query'] = array_values( $tax_queries );
$settings['tax_query']['relation'] = 'OR';
}
} else {
if ( empty( $atts['include'] ) ) {
$atts['include'] = - 1;
} elseif ( ! empty( $atts['exclude'] ) ) {
$include = array_map( 'trim', explode( ',', $atts['include'] ) );
$exclude = array_map( 'trim', explode( ',', $atts['exclude'] ) );
$diff = array_diff( $include, $exclude );
$atts['include'] = implode( ', ', $diff );
}
$settings = array(
'include' => $atts['include'],
'posts_per_page' => $atts['query_items_per_page'],
'offset' => $atts['query_offset'],
'post_type' => 'any',
'orderby' => 'post__in',
);
$this->atts['items_per_page'] = - 1;
}
return $settings;
}
public function buildItems() {
$this->filter_terms = $this->items = array();
$this->setContentLimits();
$this->addExcludedId( $this->postID() );
if ( 'custom' === $this->atts['post_type'] && ! empty( $this->atts['custom_query'] ) ) {
$query = html_entity_decode( vc_value_from_safe( $this->atts['custom_query'] ), ENT_QUOTES, 'utf-8' );
$post_data = query_posts( $query );
$this->atts['items_per_page'] = - 1;
} elseif ( false !== $this->atts['query_items_per_page'] ) {
$settings = $this->filterQuerySettings( $this->buildQuery( $this->atts ) );
$post_data = query_posts( $settings );
} else {
return;
}
if ( $this->atts['items_per_page'] > 0 && count( $post_data ) > $this->atts['items_per_page'] ) {
$post_data = array_slice( $post_data, 0, $this->atts['items_per_page'] );
}
foreach ( $post_data as $post ) {
$post->filter_terms = wp_get_object_terms( $post->ID, $this->atts['filter_source'], array( 'fields' => 'ids' ) );
$this->filter_terms = wp_parse_args( $this->filter_terms, $post->filter_terms );
$this->items[] = $post;
}
}
public function filterQuerySettings( $args ) {
$defaults = array(
'numberposts' => 5,
'offset' => 0,
'category' => 0,
'orderby' => 'date',
'order' => 'DESC',
'include' => array(),
'exclude' => array(),
'meta_key' => '',
'meta_value' => '',
'post_type' => 'post',
'suppress_filters' => apply_filters( 'vc_basic_grid_filter_query_suppress_filters', true ),
'public' => true,
);
$r = wp_parse_args( $args, $defaults );
if ( empty( $r['post_status'] ) ) {
$r['post_status'] = ( 'attachment' === $r['post_type'] ) ? 'inherit' : 'publish';
}
if ( ! empty( $r['numberposts'] ) && empty( $r['posts_per_page'] ) ) {
$r['posts_per_page'] = $r['numberposts'];
}
if ( ! empty( $r['category'] ) ) {
$r['cat'] = $r['category'];
}
if ( ! empty( $r['include'] ) ) {
$incposts = wp_parse_id_list( $r['include'] );
$r['posts_per_page'] = count( $incposts ); // only the number of posts included
$r['post__in'] = $incposts;
} elseif ( ! empty( $r['exclude'] ) ) {
$r['post__not_in'] = wp_parse_id_list( $r['exclude'] );
}
$r['ignore_sticky_posts'] = true;
$r['no_found_rows'] = true;
return $r;
}
public static function convertButton2ToButton3( $atts ) {
if ( isset( $atts['button_style'] ) || isset( $atts['button_size'] ) || isset( $atts['button_color'] ) ) {
// we use old button 2 attributes:
$style = isset( $atts['button_style'] ) ? $atts['button_style'] : 'rounded';
$size = isset( $atts['button_size'] ) ? $atts['button_size'] : 'md';
$color = isset( $atts['button_color'] ) ? $atts['button_color'] : 'blue';
$oldData = array(
'style' => $style,
'size' => $size,
'color' => str_replace( '_', '-', $color ),
);
// remove attributes on save
$atts['button_style'] = '';
$atts['button_size'] = '';
$atts['button_color'] = '';
$newData = WPBakeryShortCode_VC_Btn::convertAttributesToButton3( $oldData );
foreach ( $newData as $key => $value ) {
$atts[ 'btn_' . $key ] = $value;
}
}
return $atts;
}
}
By removing hyphen the warning disappears but the article grid not display

Answer 1

just place this code ([\w-]+) instead of ([\w_-]+)
it will work.

Answer 2

$id_pattern = '/' . $this->grid_id_unique_name . '\:([\w\_-]+)/';
preg_match( $id_pattern, $id_value, $id_matches );
Apart from the issue you mentioned (or maybe the cause of the issue you mentioned), there is an issue in the way you generate $id_pattern.
It is used as the first argument of preg_match that expects it to be a string containing a valid regular . But, because its value is generated and $this->grid_id_unique_name may contain anything, including characters that have special meaning in regex, $id_pattern may end up containing a string that is not a valid regex.
When you build a regex using dynamic values (user input, values from persistence etc) you need to use preg_quote() to encode the special regex characters properly.
The code should be:
$id_pattern = '/' . preg_quote($this->grid_id_unique_name, '/') . '\:([\w\_-]+)/';
There are other small issues (that does not cause errors) in the fixed part of the regex.
The underscore (_) is not a special character, there is no need to escape it. Even more the underscore is already included in \w (the class word characters - it contains the digits, the letters and the underscore). This renders _ (escaped or not) completely useless.
Other than that, : is a special character in regex only in subpatterns. It does not have any special meaning in this combination. You can safely leave it unescaped.
In the end, the correct generation of $id_pattern is:
$id_pattern = '/' . preg_quote($this->grid_id_unique_name, '/') . ':([\w-]+)/';