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486 lines
11 KiB
PHTML
486 lines
11 KiB
PHTML
7 months ago
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<?php
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/**
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* Helper functions to clean and sanitize data, escape it and prepare the output.
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*
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* @since 1.8.0
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*/
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use WPForms\Helpers\Templates;
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/**
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* Decode special characters, both alpha- (<) and numeric-based (').
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* Sanitize recursively, preserve new lines.
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* Handle all the possible mixed variations of < and `<` that can be processed into tags.
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*
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* @since 1.4.1
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* @since 1.6.0 Sanitize recursively, preserve new lines.
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*
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* @param string $string Raw string to decode.
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*
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* @return string
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*/
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function wpforms_decode_string( $string ) {
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if ( ! is_string( $string ) ) {
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return $string;
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}
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/*
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* Sanitization should be done first, so tags are stripped and < is converted to < etc.
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* This iteration may do nothing when the string already comes with < and > only.
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*/
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$string = wpforms_sanitize_text_deeply( $string, true );
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// Now we need to convert the string without tags: < back to < (same for quotes).
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$string = wp_kses_decode_entities( html_entity_decode( $string, ENT_QUOTES ) );
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// And now we need to sanitize AGAIN, to avoid unwanted tags that appeared after decoding.
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return wpforms_sanitize_text_deeply( $string, true );
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}
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/**
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* Sanitize key, primarily used for looking up options.
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*
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* @since 1.3.9
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*
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* @param string $key Key name.
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*
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* @return string
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*/
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function wpforms_sanitize_key( $key = '' ) {
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return preg_replace( '/[^a-zA-Z0-9_\-\.\:\/]/', '', $key );
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}
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/**
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* Sanitize hex color.
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*
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* @since 1.2.1
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*
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* @param string $color Color value.
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*
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* @return string
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*/
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function wpforms_sanitize_hex_color( $color ) {
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if ( empty( $color ) ) {
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return '';
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}
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// 3 or 6 hex digits, or the empty string.
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if ( preg_match( '|^#([A-Fa-f0-9]{3}){1,2}$|', $color ) ) {
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return $color;
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}
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return '';
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}
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/**
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* Sanitize error message, primarily used during form frontend output.
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*
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* @since 1.3.7
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* @since 1.7.6 Expand list of allowed HTML tags and attributes.
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*
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* @param string $error Error message.
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*
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* @return string
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*/
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function wpforms_sanitize_error( $error = '' ) {
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$allow = [
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'a' => [
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'href' => [],
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'title' => [],
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'target' => [],
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'rel' => [],
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],
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'br' => [],
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'em' => [],
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'strong' => [],
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'del' => [],
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'p' => [
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'style' => [],
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],
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'blockquote' => [],
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'ul' => [],
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'ol' => [],
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'li' => [],
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'span' => [
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'style' => [],
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],
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];
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return wp_kses( $error, $allow );
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}
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/**
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* Sanitize a string, that can be a multiline.
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*
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* @uses wpforms_sanitize_text_deeply()
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*
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* @since 1.4.1
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*
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* @param string $string String to deeply sanitize.
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*
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* @return string Sanitized string, or empty string if not a string provided.
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*/
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function wpforms_sanitize_textarea_field( $string ) {
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return wpforms_sanitize_text_deeply( $string, true );
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}
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/**
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* Deeply sanitize the string, preserve newlines if needed.
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* Prevent maliciously prepared strings from containing HTML tags.
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*
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* @since 1.6.0
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*
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* @param string $string String to deeply sanitize.
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* @param bool $keep_newlines Whether to keep newlines. Default: false.
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*
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* @return string Sanitized string, or empty string if not a string provided.
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*/
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function wpforms_sanitize_text_deeply( $string, $keep_newlines = false ) {
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if ( is_object( $string ) || is_array( $string ) ) {
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return '';
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}
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$string = (string) $string;
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$keep_newlines = (bool) $keep_newlines;
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$new_value = _sanitize_text_fields( $string, $keep_newlines );
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if ( strlen( $new_value ) !== strlen( $string ) ) {
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$new_value = wpforms_sanitize_text_deeply( $new_value, $keep_newlines );
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}
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return $new_value;
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}
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/**
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* Sanitize an HTML string with a set of allowed HTML tags.
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*
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* @since 1.7.0
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*
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* @param string $value String to sanitize.
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*
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* @return string Sanitized string.
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*/
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function wpforms_sanitize_richtext_field( $value ) {
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$count = 1;
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$value = convert_invalid_entities( $value );
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// Remove 'script' and 'style' tags recursively.
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while ( $count ) {
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$value = preg_replace( '@<(script|style)[^>]*?>.*?</\\1>@si', '', $value, - 1, $count );
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}
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// Make sure we have allowed tags only.
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$value = wp_kses( $value, wpforms_get_allowed_html_tags_for_richtext_field() );
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// Make sure that all tags are balanced.
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return force_balance_tags( $value );
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}
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/**
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* Escaping for Rich Text field values.
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*
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* @since 1.7.0
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*
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* @param string $value Text to escape.
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*
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* @return string Escaped text.
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*/
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function wpforms_esc_richtext_field( $value ) {
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return wpautop( wpforms_sanitize_richtext_field( $value ) );
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}
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/**
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* Retrieve allowed HTML tags for Rich Text field.
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*
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* @since 1.7.0
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*
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* @return array Array of allowed tags.
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*/
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function wpforms_get_allowed_html_tags_for_richtext_field() {
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$allowed_tags = array_fill_keys(
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[
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'img',
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'h1',
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'h2',
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'h3',
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'h4',
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'h5',
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'h6',
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'p',
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'a',
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'ul',
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'ol',
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'li',
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'dl',
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'dt',
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'dd',
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'hr',
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'br',
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'code',
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'pre',
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'strong',
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'b',
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'em',
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'i',
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'blockquote',
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'cite',
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'q',
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'del',
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'span',
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'small',
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'table',
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'thead',
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'tbody',
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'th',
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'tr',
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'td',
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'abbr',
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'address',
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'sub',
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'sup',
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'ins',
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'figure',
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'figcaption',
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'div',
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],
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array_fill_keys(
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[ 'align', 'class', 'id', 'style', 'src', 'rel', 'alt', 'href', 'target', 'width', 'height', 'title', 'cite', 'start', 'reversed', 'datetime' ],
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[]
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)
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);
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/**
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* Allowed HTML tags for Rich Text field.
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*
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* @since 1.7.0
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*
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* @param array $allowed_tags Allowed HTML tags.
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*/
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$tags = (array) apply_filters( 'wpforms_get_allowed_html_tags_for_richtext_field', $allowed_tags );
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// Force unset iframes, script and style no matter when we get back
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// from apply_filters, as they are a huge security risk.
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unset( $tags['iframe'], $tags['script'], $tags['style'] );
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return $tags;
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}
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/**
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* Sanitize an array, that consists of values as strings.
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* After that - merge all array values into multiline string.
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*
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* @since 1.4.1
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*
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* @param array $array Data to sanitize.
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*
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* @return mixed If not an array is passed (or empty var) - return unmodified var. Otherwise - a merged array into multiline string.
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*/
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function wpforms_sanitize_array_combine( $array ) {
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if ( empty( $array ) || ! is_array( $array ) ) {
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return $array;
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}
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return implode( "\n", array_map( 'sanitize_text_field', $array ) );
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}
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/**
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* Format, sanitize, and return/echo HTML element ID, classes, attributes,
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* and data attributes.
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*
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* @since 1.3.7
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*
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* @param string $id HTML id attribute value.
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* @param array $class A list of classnames for the class attribute.
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* @param array $datas Data attributes.
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* @param array $atts Any additional HTML attributes and their values.
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* @param bool $echo Whether to echo the output or just return it. Defaults to return.
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*
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* @return string|void
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*/
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function wpforms_html_attributes( $id = '', $class = [], $datas = [], $atts = [], $echo = false ) {
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$id = trim( $id );
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$parts = [];
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if ( ! empty( $id ) ) {
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$id = sanitize_html_class( $id );
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if ( ! empty( $id ) ) {
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$parts[] = 'id="' . $id . '"';
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}
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}
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if ( ! empty( $class ) ) {
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$class = wpforms_sanitize_classes( $class, true );
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if ( ! empty( $class ) ) {
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$parts[] = 'class="' . $class . '"';
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}
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}
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if ( ! empty( $datas ) ) {
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foreach ( $datas as $data => $val ) {
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$parts[] = 'data-' . sanitize_html_class( $data ) . '="' . esc_attr( $val ) . '"';
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}
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}
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if ( ! empty( $atts ) ) {
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foreach ( $atts as $att => $val ) {
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if ( '0' === (string) $val || ! empty( $val ) ) {
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if ( $att[0] === '[' ) {
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// Handle special case for bound attributes in AMP.
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$escaped_att = '[' . sanitize_html_class( trim( $att, '[]' ) ) . ']';
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} else {
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$escaped_att = sanitize_html_class( $att );
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}
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$parts[] = $escaped_att . '="' . esc_attr( $val ) . '"';
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}
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}
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}
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$output = implode( ' ', $parts );
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if ( $echo ) {
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echo trim( $output ); // phpcs:ignore
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} else {
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return trim( $output );
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}
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}
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/**
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* Sanitize string of CSS classes.
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*
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* @since 1.2.1
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*
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* @param array|string $classes CSS classes.
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* @param bool $convert True will convert strings to array and vice versa.
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*
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* @return string|array
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*/
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function wpforms_sanitize_classes( $classes, $convert = false ) {
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$array = is_array( $classes );
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$css = [];
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if ( ! empty( $classes ) ) {
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if ( ! $array ) {
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$classes = explode( ' ', trim( $classes ) );
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}
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foreach ( array_unique( $classes ) as $class ) {
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if ( ! empty( $class ) ) {
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$css[] = sanitize_html_class( $class );
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}
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}
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}
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if ( $array ) {
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return $convert ? implode( ' ', $css ) : $css;
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}
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return $convert ? $css : implode( ' ', $css );
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}
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/**
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||
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* Include a template - alias to \WPForms\Helpers\Template::get_html.
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||
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* Use 'require' if $args are passed or 'load_template' if not.
|
||
|
|
*
|
||
|
|
* @since 1.5.6
|
||
|
|
*
|
||
|
|
* @param string $template_name Template name.
|
||
|
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* @param array $args Arguments.
|
||
|
|
* @param bool $extract Extract arguments.
|
||
|
|
*
|
||
|
|
* @throws RuntimeException If extract() tries to modify the scope.
|
||
|
|
*
|
||
|
|
* @return string Compiled HTML.
|
||
|
|
*/
|
||
|
|
function wpforms_render( $template_name, $args = [], $extract = false ) {
|
||
|
|
|
||
|
|
return Templates::get_html( $template_name, $args, $extract );
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Alias for default readonly function.
|
||
|
|
*
|
||
|
|
* @since 1.6.9
|
||
|
|
*
|
||
|
|
* @param mixed $readonly One of the values to compare.
|
||
|
|
* @param mixed $current The other value to compare if not just true.
|
||
|
|
* @param bool $echo Whether to echo or just return the string.
|
||
|
|
*
|
||
|
|
* @return string HTML attribute or empty string.
|
||
|
|
*/
|
||
|
|
function wpforms_readonly( $readonly, $current = true, $echo = true ) {
|
||
|
|
|
||
|
|
if ( function_exists( 'wp_readonly' ) ) {
|
||
|
|
return wp_readonly( $readonly, $current, $echo );
|
||
|
|
}
|
||
|
|
|
||
|
|
return __checked_selected_helper( $readonly, $current, $echo, 'readonly' );
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the required label text, with a filter.
|
||
|
|
*
|
||
|
|
* @since 1.4.4
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
function wpforms_get_required_label() {
|
||
|
|
|
||
|
|
return apply_filters( 'wpforms_required_label', esc_html__( 'This field is required.', 'wpforms-lite' ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the required field label HTML, with a filter.
|
||
|
|
*
|
||
|
|
* @since 1.4.8
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
function wpforms_get_field_required_label() {
|
||
|
|
|
||
|
|
$label_html = apply_filters_deprecated(
|
||
|
|
'wpforms_field_required_label',
|
||
|
|
[ ' <span class="wpforms-required-label">*</span>' ],
|
||
|
|
'1.4.8 of the WPForms plugin',
|
||
|
|
'wpforms_get_field_required_label'
|
||
|
|
);
|
||
|
|
|
||
|
|
return apply_filters( 'wpforms_get_field_required_label', $label_html );
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Escape unselected choices for radio/checkbox fields.
|
||
|
|
*
|
||
|
|
* @since 1.8.3
|
||
|
|
*
|
||
|
|
* @param string $formatted_field HTML field.
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
function wpforms_esc_unselected_choices( $formatted_field ) {
|
||
|
|
|
||
|
|
$allowed_html = wp_kses_allowed_html( 'post' );
|
||
|
|
|
||
|
|
$allowed_html['input'] = [
|
||
|
|
'type' => [],
|
||
|
|
'disabled' => [],
|
||
|
|
'checked' => [],
|
||
|
|
];
|
||
|
|
$allowed_html['label'] = [];
|
||
|
|
|
||
|
|
return wp_kses( $formatted_field, $allowed_html );
|
||
|
|
}
|