<?php
/**
* Replaces double line breaks with paragraph elements.
*
* This is a variant of wpautop() that is specifically tuned for
* form content uses.
*
* @param string $pee The text which has to be formatted.
* @param bool $br Optional. If set, this will convert all remaining
* line breaks after paragraphing. Default true.
* @return string Text which has been converted into correct paragraph tags.
*/
function wpcf7_autop( $pee, $br = 1 ) {
if ( trim( $pee ) === '' ) {
return '';
}
$pee = $pee . "\n"; // just to make things a little easier, pad the end
$pee = preg_replace( '|<br />\s*<br />|', "\n\n", $pee );
// Space things out a little
/* wpcf7: remove select and input */
$allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|form|map|area|blockquote|address|math|style|p|h[1-6]|hr|fieldset|legend|section|article|aside|hgroup|header|footer|nav|figure|figcaption|details|menu|summary)';
$pee = preg_replace( '!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee );
$pee = preg_replace( '!(</' . $allblocks . '>)!', "$1\n\n", $pee );
/* wpcf7: take care of [response], [recaptcha], and [hidden] tags */
$form_tags_manager = WPCF7_FormTagsManager::get_instance();
$block_hidden_form_tags = $form_tags_manager->collect_tag_types(
array( 'display-block', 'display-hidden' ) );
$block_hidden_form_tags = sprintf( '(?:%s)',
implode( '|', $block_hidden_form_tags ) );
$pee = preg_replace( '!(\[' . $block_hidden_form_tags . '[^]]*\])!',
"\n$1\n\n", $pee );
$pee = str_replace( array( "\r\n", "\r" ), "\n", $pee ); // cross-platform newlines
if ( strpos( $pee, '<object' ) !== false ) {
$pee = preg_replace( '|\s*<param([^>]*)>\s*|', "<param$1>", $pee ); // no pee inside object/embed
$pee = preg_replace( '|\s*</embed>\s*|', '</embed>', $pee );
}
$pee = preg_replace( "/\n\n+/", "\n\n", $pee ); // take care of duplicates
// make paragraphs, including one at the end
$pees = preg_split( '/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY );
$pee = '';
foreach ( $pees as $tinkle ) {
$pee .= '<p>' . trim( $tinkle, "\n" ) . "</p>\n";
}
$pee = preg_replace( '!<p>([^<]+)</(div|address|form|fieldset)>!', "<p>$1</p></$2>", $pee );
$pee = preg_replace( '|<p>\s*</p>|', '', $pee ); // under certain strange conditions it could create a P of entirely whitespace
$pee = preg_replace( '!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee ); // don't pee all over a tag
$pee = preg_replace( "|<p>(<li.+?)</p>|", "$1", $pee ); // problem with nested lists
$pee = preg_replace( '|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $pee );
$pee = str_replace( '</blockquote></p>', '</p></blockquote>', $pee );
$pee = preg_replace( '!<p>\s*(</?' . $allblocks . '[^>]*>)!', "$1", $pee );
$pee = preg_replace( '!(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee );
/* wpcf7: take care of [response], [recaptcha], and [hidden] tag */
$pee = preg_replace( '!<p>\s*(\[' . $block_hidden_form_tags . '[^]]*\])!',
"$1", $pee );
$pee = preg_replace( '!(\[' . $block_hidden_form_tags . '[^]]*\])\s*</p>!',
"$1", $pee );
if ( $br ) {
/* wpcf7: add textarea */
$pee = preg_replace_callback(
'/<(script|style|textarea).*?<\/\\1>/s',
'wpcf7_autop_preserve_newline_callback', $pee );
$pee = preg_replace( '|(?<!<br />)\s*\n|', "<br />\n", $pee ); // optionally make line breaks
$pee = str_replace( '<WPPreserveNewline />', "\n", $pee );
/* wpcf7: remove extra <br /> just added before [response], [recaptcha], and [hidden] tags */
$pee = preg_replace( '!<br />\n(\[' . $block_hidden_form_tags . '[^]]*\])!',
"\n$1", $pee );
}
$pee = preg_replace( '!(</?' . $allblocks . '[^>]*>)\s*<br />!', "$1", $pee );
$pee = preg_replace( '!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee );
if ( strpos( $pee, '<pre' ) !== false ) {
$pee = preg_replace_callback( '!(<pre[^>]*>)(.*?)</pre>!is',
'clean_pre', $pee );
}
$pee = preg_replace( "|<br />$|", '', $pee );
$pee = preg_replace( "|\n</p>$|", '</p>', $pee );
return $pee;
}
/**
* Newline preservation help function for wpcf7_autop().
*
* @param array $matches preg_replace_callback() matches array.
* @return string Text including newline placeholders.
*/
function wpcf7_autop_preserve_newline_callback( $matches ) {
return str_replace( "\n", '<WPPreserveNewline />', $matches[0] );
}
/**
* Sanitizes the query variables.
*
* @param string $text Query variable.
* @return string Text sanitized.
*/
function wpcf7_sanitize_query_var( $text ) {
$text = wp_unslash( $text );
$text = wp_check_invalid_utf8( $text );
if ( false !== strpos( $text, '<' ) ) {
$text = wp_pre_kses_less_than( $text );
$text = wp_strip_all_tags( $text );
}
$text = preg_replace( '/%[a-f0-9]{2}/i', '', $text );
$text = preg_replace( '/ +/', ' ', $text );
$text = trim( $text, ' ' );
return $text;
}
/**
* Strips quote characters surrounding the input.
*
* @param string $text Input text.
* @return string Processed output.
*/
function wpcf7_strip_quote( $text ) {
$text = trim( $text );
if ( preg_match( '/^"(.*)"$/s', $text, $matches ) ) {
$text = $matches[1];
} elseif ( preg_match( "/^'(.*)'$/s", $text, $matches ) ) {
$text = $matches[1];
}
return $text;
}
/**
* Navigates through an array, object, or scalar, and
* strips quote characters surrounding the each value.
*
* @param mixed $arr The array or string to be processed.
* @return mixed Processed value.
*/
function wpcf7_strip_quote_deep( $arr ) {
if ( is_string( $arr ) ) {
return wpcf7_strip_quote( $arr );
}
if ( is_array( $arr ) ) {
$result = array();
foreach ( $arr as $key => $text ) {
$result[$key] = wpcf7_strip_quote_deep( $text );
}
return $result;
}
}
/**
* Normalizes newline characters.
*
* @param string $text Input text.
* @param string $to Optional. The newline character that is used in the output.
* @return string Normalized text.
*/
function wpcf7_normalize_newline( $text, $to = "\n" ) {
if ( ! is_string( $text ) ) {
return $text;
}
$nls = array( "\r\n", "\r", "\n" );
if ( ! in_array( $to, $nls ) ) {
return $text;
}
return str_replace( $nls, $to, $text );
}
/**
* Navigates through an array, object, or scalar, and
* normalizes newline characters in the each value.
*
* @param mixed $arr The array or string to be processed.
* @param string $to Optional. The newline character that is used in the output.
* @return mixed Processed value.
*/
function wpcf7_normalize_newline_deep( $arr, $to = "\n" ) {
if ( is_array( $arr ) ) {
$result = array();
foreach ( $arr as $key => $text ) {
$result[$key] = wpcf7_normalize_newline_deep( $text, $to );
}
return $result;
}
return wpcf7_normalize_newline( $arr, $to );
}
/**
* Strips newline characters.
*
* @param string $str Input text.
* @return string Processed one-line text.
*/
function wpcf7_strip_newline( $str ) {
$str = (string) $str;
$str = str_replace( array( "\r", "\n" ), '', $str );
return trim( $str );
}
/**
* Canonicalizes text.
*
* @param string $text Input text.
* @param string|array|object $args Options.
* @return string Canonicalized text.
*/
function wpcf7_canonicalize( $text, $args = '' ) {
// for back-compat
if ( is_string( $args ) and '' !== $args
and false === strpos( $args, '=' ) ) {
$args = array(
'strto' => $args,
);
}
$args = wp_parse_args( $args, array(
'strto' => 'lower',
'strip_separators' => false,
) );
static $charset = null;
if ( ! isset( $charset ) ) {
$charset = get_option( 'blog_charset' );
$is_utf8 = in_array(
$charset,
array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' )
);
if ( $is_utf8 ) {
$charset = 'UTF-8';
}
}
$text = html_entity_decode( $text, ENT_QUOTES | ENT_HTML5, $charset );
if ( function_exists( 'mb_convert_kana' ) ) {
$text = mb_convert_kana( $text, 'asKV', $charset );
}
if ( $args['strip_separators'] ) {
$text = preg_replace( '/[\r\n\t ]+/', '', $text );
} else {
$text = preg_replace( '/[\r\n\t ]+/', ' ', $text );
}
if ( 'lower' == $args['strto'] ) {
if ( function_exists( 'mb_strtolower' ) ) {
$text = mb_strtolower( $text, $charset );
} else {
$text = strtolower( $text );
}
} elseif ( 'upper' == $args['strto'] ) {
if ( function_exists( 'mb_strtoupper' ) ) {
$text = mb_strtoupper( $text, $charset );
} else {
$text = strtoupper( $text );
}
}
$text = trim( $text );
return $text;
}
/**
* Sanitizes Contact Form 7's form unit-tag.
*
* @param string $tag Unit-tag.
* @return string Sanitized unit-tag.
*/
function wpcf7_sanitize_unit_tag( $tag ) {
$tag = preg_replace( '/[^A-Za-z0-9_-]/', '', $tag );
return $tag;
}
/**
* Converts a file name to one that is not executable as a script.
*
* @param string $filename File name.
* @return string Converted file name.
*/
function wpcf7_antiscript_file_name( $filename ) {
$filename = wp_basename( $filename );
$filename = preg_replace( '/[\r\n\t -]+/', '-', $filename );
$filename = preg_replace( '/[\pC\pZ]+/iu', '', $filename );
$parts = explode( '.', $filename );
if ( count( $parts ) < 2 ) {
return $filename;
}
$script_pattern = '/^(php|phtml|pl|py|rb|cgi|asp|aspx)\d?$/i';
$filename = array_shift( $parts );
$extension = array_pop( $parts );
foreach ( (array) $parts as $part ) {
if ( preg_match( $script_pattern, $part ) ) {
$filename .= '.' . $part . '_';
} else {
$filename .= '.' . $part;
}
}
if ( preg_match( $script_pattern, $extension ) ) {
$filename .= '.' . $extension . '_.txt';
} else {
$filename .= '.' . $extension;
}
return $filename;
}
/**
* Masks a password with asterisks (*).
*
* @param int $right Length of right-hand unmasked text. Default 0.
* @param int $left Length of left-hand unmasked text. Default 0.
* @return string Text of masked password.
*/
function wpcf7_mask_password( $text, $right = 0, $left = 0 ) {
$length = strlen( $text );
$right = absint( $right );
$left = absint( $left );
if ( $length < $right + $left ) {
$right = $left = 0;
}
if ( $length <= 48 ) {
$masked = str_repeat( '*', $length - ( $right + $left ) );
} elseif ( $right + $left < 48 ) {
$masked = str_repeat( '*', 48 - ( $right + $left ) );
} else {
$masked = '****';
}
$left_unmasked = $left ? substr( $text, 0, $left ) : '';
$right_unmasked = $right ? substr( $text, -1 * $right ) : '';
$text = $left_unmasked . $masked . $right_unmasked;
return $text;
}
/**
* Returns an array of allowed HTML tags and attributes for a given context.
*
* @param string $context Context used to decide allowed tags and attributes.
* @return array Array of allowed HTML tags and their allowed attributes.
*/
function wpcf7_kses_allowed_html( $context = 'form' ) {
static $allowed_tags = array();
if ( isset( $allowed_tags[$context] ) ) {
return apply_filters(
'wpcf7_kses_allowed_html',
$allowed_tags[$context],
$context
);
}
$allowed_tags[$context] = wp_kses_allowed_html( 'post' );
if ( 'form' === $context ) {
$additional_tags_for_form = array(
'button' => array(
'disabled' => true,
'name' => true,
'type' => true,
'value' => true,
),
'datalist' => array(),
'fieldset' => array(
'disabled' => true,
'name' => true,
),
'input' => array(
'accept' => true,
'alt' => true,
'capture' => true,
'checked' => true,
'disabled' => true,
'list' => true,
'max' => true,
'maxlength' => true,
'min' => true,
'minlength' => true,
'multiple' => true,
'name' => true,
'placeholder' => true,
'readonly' => true,
'size' => true,
'step' => true,
'type' => true,
'value' => true,
),
'label' => array(
'for' => true,
),
'legend' => array(),
'meter' => array(
'value' => true,
'min' => true,
'max' => true,
'low' => true,
'high' => true,
'optimum' => true,
),
'optgroup' => array(
'disabled' => true,
'label' => true,
),
'option' => array(
'disabled' => true,
'label' => true,
'selected' => true,
'value' => true,
),
'output' => array(
'for' => true,
'name' => true,
),
'progress' => array(
'max' => true,
'value' => true,
),
'select' => array(
'disabled' => true,
'multiple' => true,
'name' => true,
'size' => true,
),
'textarea' => array(
'cols' => true,
'disabled' => true,
'maxlength' => true,
'minlength' => true,
'name' => true,
'placeholder' => true,
'readonly' => true,
'rows' => true,
'spellcheck' => true,
'wrap' => true,
),
);
$additional_tags_for_form = array_map(
function ( $elm ) {
$global_attributes = array(
'aria-atomic' => true,
'aria-checked' => true,
'aria-describedby' => true,
'aria-details' => true,
'aria-disabled' => true,
'aria-hidden' => true,
'aria-invalid' => true,
'aria-label' => true,
'aria-labelledby' => true,
'aria-live' => true,
'aria-relevant' => true,
'aria-required' => true,
'aria-selected' => true,
'class' => true,
'data-*' => true,
'id' => true,
'inputmode' => true,
'role' => true,
'style' => true,
'tabindex' => true,
'title' => true,
);
return array_merge( $global_attributes, (array) $elm );
},
$additional_tags_for_form
);
$allowed_tags[$context] = array_merge(
$allowed_tags[$context],
$additional_tags_for_form
);
}
return apply_filters(
'wpcf7_kses_allowed_html',
$allowed_tags[$context],
$context
);
}
/**
* Sanitizes content for allowed HTML tags for the specified context.
*
* @param string $input Content to filter.
* @param string $context Context used to decide allowed tags and attributes.
* @return string Filtered text with allowed HTML tags and attributes intact.
*/
function wpcf7_kses( $input, $context = 'form' ) {
$output = wp_kses(
$input,
wpcf7_kses_allowed_html( $context )
);
return $output;
}