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<?php |
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/** |
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* Output functions |
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* Processing text for output such as pulling out URLs and extracting excerpts |
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* |
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* @package Elgg |
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* @subpackage Core |
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*/ |
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/** |
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* Takes a string and turns any URLs into formatted links |
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* |
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* @param string $text The input string |
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* |
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* @return string The output string with formatted links |
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*/ |
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function parse_urls($text) { |
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// URI specification: http://www.ietf.org/rfc/rfc3986.txt |
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// This varies from the specification in the following ways: |
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// * Supports non-ascii characters |
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// * Does not allow parentheses and single quotes |
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// * Cuts off commas, exclamation points, and periods off as last character |
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// @todo this causes problems with <attr = "val"> |
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// must be in <attr="val"> format (no space). |
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// By default htmlawed rewrites tags to this format. |
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// if PHP supported conditional negative lookbehinds we could use this: |
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// $r = preg_replace_callback('/(?<!=)(?<![ ])?(?<!["\'])((ht|f)tps?:\/\/[^\s\r\n\t<>"\'\!\(\),]+)/i', |
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$r = preg_replace_callback('/(?<![=\/"\'])((ht|f)tps?:\/\/[^\s\r\n\t<>"\']+)/i', |
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create_function( |
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'$matches', |
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' |
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$url = $matches[1]; |
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$punc = ""; |
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$last = substr($url, -1, 1); |
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if (in_array($last, array(".", "!", ",", "(", ")"))) { |
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$punc = $last; |
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$url = rtrim($url, ".!,()"); |
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} |
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$urltext = str_replace("/", "/<wbr />", $url); |
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return "<a href=\"$url\" rel=\"nofollow\">$urltext</a>$punc"; |
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' |
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), $text); |
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return $r; |
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} |
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/** |
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* Create paragraphs from text with line spacing |
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* |
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* @param string $string The string |
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* |
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* @return string |
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**/ |
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function elgg_autop($string) { |
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return _elgg_services()->autoP->process($string); |
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} |
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/** |
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* Returns an excerpt. |
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* Will return up to n chars stopping at the nearest space. |
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* If no spaces are found (like in Japanese) will crop off at the |
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* n char mark. Adds ... if any text was chopped. |
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* |
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* @param string $text The full text to excerpt |
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* @param int $num_chars Return a string up to $num_chars long |
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* |
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* @return string |
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* @since 1.7.2 |
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*/ |
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function elgg_get_excerpt($text, $num_chars = 250) { |
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$text = trim(elgg_strip_tags($text)); |
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$string_length = elgg_strlen($text); |
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if ($string_length <= $num_chars) { |
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return $text; |
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} |
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// handle cases |
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$excerpt = elgg_substr($text, 0, $num_chars); |
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$space = elgg_strrpos($excerpt, ' ', 0); |
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// don't crop if can't find a space. |
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if ($space === false) { |
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$space = $num_chars; |
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} |
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$excerpt = trim(elgg_substr($excerpt, 0, $space)); |
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if ($string_length != elgg_strlen($excerpt)) { |
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$excerpt .= '...'; |
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} |
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return $excerpt; |
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} |
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/** |
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* Handles formatting of ampersands in urls |
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* |
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* @param string $url The URL |
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* |
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* @return string |
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* @since 1.7.1 |
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*/ |
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function elgg_format_url($url) { |
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return preg_replace('/&(?!amp;)/', '&', $url); |
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} |
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/** |
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* Format bytes to a human readable format |
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* |
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* @param int $size File size in bytes to format |
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* |
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* @param int $precision Precision to round formatting bytes to |
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* |
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* @return string |
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* @since 1.9.0 |
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*/ |
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function elgg_format_bytes($size, $precision = 2) { |
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if (!$size || $size < 0) { |
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return false; |
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} |
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$base = log($size) / log(1024); |
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$suffixes = array('B', 'kB', 'MB', 'GB', 'TB'); |
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return round(pow(1024, $base - floor($base)), $precision) . ' ' . $suffixes[floor($base)]; |
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} |
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/** |
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* Converts an associative array into a string of well-formed attributes |
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* |
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* @note usually for HTML, but could be useful for XML too... |
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* |
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* @param array $attrs An associative array of attr => val pairs |
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* |
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* @return string HTML attributes to be inserted into a tag (e.g., <tag $attrs>) |
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*/ |
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function elgg_format_attributes(array $attrs = array()) { |
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if (!is_array($attrs) || !count($attrs)) { |
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return ''; |
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} |
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$attrs = _elgg_clean_vars($attrs); |
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$attributes = array(); |
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if (isset($attrs['js'])) { |
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elgg_deprecated_notice('Use associative array of attr => val pairs instead of $vars[\'js\']', 1.8); |
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if (!empty($attrs['js'])) { |
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$attributes[] = $attrs['js']; |
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} |
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unset($attrs['js']); |
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} |
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foreach ($attrs as $attr => $val) { |
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$attr = strtolower($attr); |
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if ($val === true) { |
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$val = $attr; //e.g. checked => true ==> checked="checked" |
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} |
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/** |
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* Ignore non-array values and allow attribute values to be an array |
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* <code> |
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* $attrs = array( |
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* 'entity' => <\ElggObject>, // will be ignored |
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* 'class' => array('elgg-input', 'elgg-input-text'), // will be imploded with spaces |
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* 'style' => array('margin-left:10px;', 'color: #666;'), // will be imploded with spaces |
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* 'alt' => 'Alt text', // will be left as is |
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* ); |
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* </code> |
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*/ |
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if ($val !== NULL && $val !== false && (is_array($val) || !is_object($val))) { |
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if (is_array($val)) { |
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$val = implode(' ', $val); |
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} |
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$val = htmlspecialchars($val, ENT_QUOTES, 'UTF-8', false); |
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$attributes[] = "$attr=\"$val\""; |
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} |
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} |
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return implode(' ', $attributes); |
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} |
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/** |
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* Format an HTML element |
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* |
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* @param string $tag_name The element tagName. e.g. "div". This will not be validated. |
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* |
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* @param array $attributes The element attributes. This is passed to elgg_format_attributes(). |
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* |
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* @param string $text The contents of the element. Assumed to be HTML unless encode_text is true. |
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* |
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* @param array $options Options array with keys: |
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* |
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* encode_text => (bool, default false) If true, $text will be HTML-escaped. Already-escaped entities |
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* will not be double-escaped. |
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* |
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* double_encode => (bool, default false) If true, the $text HTML escaping will be allowed to double |
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* encode HTML entities: '×' will become '&times;' |
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* |
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* is_void => (bool) If given, this determines whether the function will return just the open tag. |
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* Otherwise this will be determined by the tag name according to this list: |
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* http://www.w3.org/html/wg/drafts/html/master/single-page.html#void-elements |
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* |
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* is_xml => (bool, default false) If true, void elements will be formatted like "<tag />" |
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* |
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* @return string |
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* @throws InvalidArgumentException |
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* @since 1.9.0 |
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*/ |
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function elgg_format_element($tag_name, array $attributes = array(), $text = '', array $options = array()) { |
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if (!is_string($tag_name)) { |
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throw new \InvalidArgumentException('$tag_name is required'); |
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} |
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if (isset($options['is_void'])) { |
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$is_void = $options['is_void']; |
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} else { |
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// from http://www.w3.org/TR/html-markup/syntax.html#syntax-elements |
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$is_void = in_array(strtolower($tag_name), array( |
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'area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input', 'keygen', 'link', 'menuitem', |
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'meta', 'param', 'source', 'track', 'wbr' |
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)); |
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} |
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if (!empty($options['encode_text'])) { |
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$double_encode = empty($options['double_encode']) ? false : true; |
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$text = htmlspecialchars($text, ENT_QUOTES, 'UTF-8', $double_encode); |
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} |
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if ($attributes) { |
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$attrs = elgg_format_attributes($attributes); |
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if ($attrs !== '') { |
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$attrs = " $attrs"; |
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} |
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} else { |
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$attrs = ''; |
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} |
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if ($is_void) { |
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return empty($options['is_xml']) ? "<{$tag_name}{$attrs}>" : "<{$tag_name}{$attrs} />"; |
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} else { |
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return "<{$tag_name}{$attrs}>$text</$tag_name>"; |
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} |
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} |
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/** |
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* Preps an associative array for use in {@link elgg_format_attributes()}. |
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* |
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* Removes all the junk that {@link elgg_view()} puts into $vars. |
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* Maintains backward compatibility with attributes like 'internalname' and 'internalid' |
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* |
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* @note This function is called automatically by elgg_format_attributes(). No need to |
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* call it yourself before using elgg_format_attributes(). |
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* |
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* @param array $vars The raw $vars array with all it's dirtiness (config, url, etc.) |
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* |
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* @return array The array, ready to be used in elgg_format_attributes(). |
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* @access private |
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*/ |
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function _elgg_clean_vars(array $vars = array()) { |
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unset($vars['config']); |
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unset($vars['url']); |
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unset($vars['user']); |
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// backwards compatibility code |
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if (isset($vars['internalname'])) { |
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if (!isset($vars['__ignoreInternalname'])) { |
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$vars['name'] = $vars['internalname']; |
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} |
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unset($vars['internalname']); |
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} |
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if (isset($vars['internalid'])) { |
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if (!isset($vars['__ignoreInternalid'])) { |
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$vars['id'] = $vars['internalid']; |
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} |
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unset($vars['internalid']); |
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} |
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if (isset($vars['__ignoreInternalid'])) { |
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unset($vars['__ignoreInternalid']); |
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} |
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if (isset($vars['__ignoreInternalname'])) { |
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unset($vars['__ignoreInternalname']); |
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} |
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return $vars; |
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} |
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/** |
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* Converts shorthand urls to absolute urls. |
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* |
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* If the url is already absolute or protocol-relative, no change is made. |
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* |
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* @example |
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* elgg_normalize_url(''); // 'http://my.site.com/' |
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* elgg_normalize_url('dashboard'); // 'http://my.site.com/dashboard' |
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* elgg_normalize_url('http://google.com/'); // no change |
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* elgg_normalize_url('//google.com/'); // no change |
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* |
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* @param string $url The URL to normalize |
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* |
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* @return string The absolute url |
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*/ |
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function elgg_normalize_url($url) { |
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// see https://bugs.php.net/bug.php?id=51192 |
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// from the bookmarks save action. |
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26 |
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$php_5_2_13_and_below = version_compare(PHP_VERSION, '5.2.14', '<'); |
|
315
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26 |
|
$php_5_3_0_to_5_3_2 = version_compare(PHP_VERSION, '5.3.0', '>=') && |
|
316
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26 |
|
version_compare(PHP_VERSION, '5.3.3', '<'); |
|
317
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318
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26 |
View Code Duplication |
if ($php_5_2_13_and_below || $php_5_3_0_to_5_3_2) { |
|
319
|
|
|
$tmp_address = str_replace("-", "", $url); |
|
320
|
|
|
$validated = filter_var($tmp_address, FILTER_VALIDATE_URL); |
|
321
|
|
|
} else { |
|
322
|
26 |
|
$validated = filter_var($url, FILTER_VALIDATE_URL); |
|
323
|
|
|
} |
|
324
|
|
|
|
|
325
|
|
|
// work around for handling absoluate IRIs (RFC 3987) - see #4190 |
|
326
|
26 |
|
if (!$validated && (strpos($url, 'http:') === 0) || (strpos($url, 'https:') === 0)) { |
|
327
|
|
|
$validated = true; |
|
328
|
|
|
} |
|
329
|
|
|
|
|
330
|
26 |
|
if ($validated) { |
|
331
|
|
|
// all normal URLs including mailto: |
|
332
|
1 |
|
return $url; |
|
333
|
|
|
|
|
334
|
26 |
|
} elseif (preg_match("#^(\#|\?|//)#i", $url)) { |
|
335
|
|
|
// '//example.com' (Shortcut for protocol.) |
|
336
|
|
|
// '?query=test', #target |
|
337
|
1 |
|
return $url; |
|
338
|
|
|
|
|
339
|
25 |
|
} elseif (stripos($url, 'javascript:') === 0 || stripos($url, 'mailto:') === 0) { |
|
340
|
|
|
// 'javascript:' and 'mailto:' |
|
341
|
|
|
// Not covered in FILTER_VALIDATE_URL |
|
342
|
|
|
return $url; |
|
343
|
|
|
|
|
344
|
25 |
|
} elseif (preg_match("#^[^/]*\.php(\?.*)?$#i", $url)) { |
|
345
|
|
|
// 'install.php', 'install.php?step=step' |
|
346
|
|
|
return elgg_get_site_url() . $url; |
|
347
|
|
|
|
|
348
|
25 |
|
} elseif (preg_match("#^[^/?]*\.#i", $url)) { |
|
349
|
|
|
// 'example.com', 'example.com/subpage' |
|
350
|
|
|
return "http://$url"; |
|
351
|
|
|
|
|
352
|
|
|
} else { |
|
353
|
|
|
// 'page/handler', 'mod/plugin/file.php' |
|
354
|
|
|
|
|
355
|
|
|
// trim off any leading / because the site URL is stored |
|
356
|
|
|
// with a trailing / |
|
357
|
25 |
|
return elgg_get_site_url() . ltrim($url, '/'); |
|
358
|
|
|
} |
|
359
|
|
|
} |
|
360
|
|
|
|
|
361
|
|
|
/** |
|
362
|
|
|
* When given a title, returns a version suitable for inclusion in a URL |
|
363
|
|
|
* |
|
364
|
|
|
* @param string $title The title |
|
365
|
|
|
* |
|
366
|
|
|
* @return string The optimized title |
|
367
|
|
|
* @since 1.7.2 |
|
368
|
|
|
*/ |
|
369
|
|
|
function elgg_get_friendly_title($title) { |
|
370
|
|
|
|
|
371
|
|
|
// return a URL friendly title to short circuit normal title formatting |
|
372
|
|
|
$params = array('title' => $title); |
|
373
|
|
|
$result = elgg_trigger_plugin_hook('format', 'friendly:title', $params, null); |
|
374
|
|
|
if ($result) { |
|
375
|
|
|
return $result; |
|
376
|
|
|
} |
|
377
|
|
|
|
|
378
|
|
|
// titles are often stored HTML encoded |
|
379
|
|
|
$title = html_entity_decode($title, ENT_QUOTES, 'UTF-8'); |
|
380
|
|
|
|
|
381
|
|
|
$title = \Elgg\Translit::urlize($title); |
|
382
|
|
|
|
|
383
|
|
|
return $title; |
|
384
|
|
|
} |
|
385
|
|
|
|
|
386
|
|
|
/** |
|
387
|
|
|
* Formats a UNIX timestamp in a friendly way (eg "less than a minute ago") |
|
388
|
|
|
* |
|
389
|
|
|
* @see elgg_view_friendly_time() |
|
390
|
|
|
* |
|
391
|
|
|
* @param int $time A UNIX epoch timestamp |
|
392
|
|
|
* @param int $current_time Current UNIX epoch timestamp (optional) |
|
393
|
|
|
* |
|
394
|
|
|
* @return string The friendly time string |
|
395
|
|
|
* @since 1.7.2 |
|
396
|
|
|
*/ |
|
397
|
|
|
function elgg_get_friendly_time($time, $current_time = null) { |
|
398
|
|
|
|
|
399
|
|
|
if (!$current_time) { |
|
|
|
|
|
|
400
|
|
|
$current_time = time(); |
|
401
|
|
|
} |
|
402
|
|
|
|
|
403
|
|
|
// return a time string to short circuit normal time formatting |
|
404
|
|
|
$params = array('time' => $time, 'current_time' => $current_time); |
|
405
|
|
|
$result = elgg_trigger_plugin_hook('format', 'friendly:time', $params, null); |
|
406
|
|
|
if ($result) { |
|
407
|
|
|
return $result; |
|
408
|
|
|
} |
|
409
|
|
|
|
|
410
|
|
|
$diff = abs((int)$current_time - (int)$time); |
|
411
|
|
|
|
|
412
|
|
|
$minute = 60; |
|
413
|
|
|
$hour = $minute * 60; |
|
414
|
|
|
$day = $hour * 24; |
|
415
|
|
|
|
|
416
|
|
|
if ($diff < $minute) { |
|
417
|
|
|
return elgg_echo("friendlytime:justnow"); |
|
418
|
|
|
} |
|
419
|
|
|
|
|
420
|
|
|
if ($diff < $hour) { |
|
421
|
|
|
$granularity = ':minutes'; |
|
422
|
|
|
$diff = round($diff / $minute); |
|
423
|
|
|
} else if ($diff < $day) { |
|
424
|
|
|
$granularity = ':hours'; |
|
425
|
|
|
$diff = round($diff / $hour); |
|
426
|
|
|
} else { |
|
427
|
|
|
$granularity = ':days'; |
|
428
|
|
|
$diff = round($diff / $day); |
|
429
|
|
|
} |
|
430
|
|
|
|
|
431
|
|
|
if ($diff == 0) { |
|
432
|
|
|
$diff = 1; |
|
433
|
|
|
} |
|
434
|
|
|
|
|
435
|
|
|
$future = ((int)$current_time - (int)$time < 0) ? ':future' : ''; |
|
436
|
|
|
$singular = ($diff == 1) ? ':singular' : ''; |
|
437
|
|
|
|
|
438
|
|
|
return elgg_echo("friendlytime{$future}{$granularity}{$singular}", array($diff)); |
|
439
|
|
|
} |
|
440
|
|
|
|
|
441
|
|
|
/** |
|
442
|
|
|
* Returns a human-readable message for PHP's upload error codes |
|
443
|
|
|
* |
|
444
|
|
|
* @param int $error_code The code as stored in $_FILES['name']['error'] |
|
445
|
|
|
* @return string |
|
446
|
|
|
*/ |
|
447
|
|
|
function elgg_get_friendly_upload_error($error_code) { |
|
448
|
|
|
switch ($error_code) { |
|
449
|
|
|
case UPLOAD_ERR_OK: |
|
450
|
|
|
return ''; |
|
451
|
|
|
|
|
452
|
|
|
case UPLOAD_ERR_INI_SIZE: |
|
453
|
|
|
$key = 'ini_size'; |
|
454
|
|
|
break; |
|
455
|
|
|
|
|
456
|
|
|
case UPLOAD_ERR_FORM_SIZE: |
|
457
|
|
|
$key = 'form_size'; |
|
458
|
|
|
break; |
|
459
|
|
|
|
|
460
|
|
|
case UPLOAD_ERR_PARTIAL: |
|
461
|
|
|
$key = 'partial'; |
|
462
|
|
|
break; |
|
463
|
|
|
|
|
464
|
|
|
case UPLOAD_ERR_NO_FILE: |
|
465
|
|
|
$key = 'no_file'; |
|
466
|
|
|
break; |
|
467
|
|
|
|
|
468
|
|
|
case UPLOAD_ERR_NO_TMP_DIR: |
|
469
|
|
|
$key = 'no_tmp_dir'; |
|
470
|
|
|
break; |
|
471
|
|
|
|
|
472
|
|
|
case UPLOAD_ERR_CANT_WRITE: |
|
473
|
|
|
$key = 'cant_write'; |
|
474
|
|
|
break; |
|
475
|
|
|
|
|
476
|
|
|
case UPLOAD_ERR_EXTENSION: |
|
477
|
|
|
$key = 'extension'; |
|
478
|
|
|
break; |
|
479
|
|
|
|
|
480
|
|
|
default: |
|
481
|
|
|
$key = 'unknown'; |
|
482
|
|
|
break; |
|
483
|
|
|
} |
|
484
|
|
|
|
|
485
|
|
|
return elgg_echo("upload:error:$key"); |
|
486
|
|
|
} |
|
487
|
|
|
|
|
488
|
|
|
|
|
489
|
|
|
/** |
|
490
|
|
|
* Strip tags and offer plugins the chance. |
|
491
|
|
|
* Plugins register for output:strip_tags plugin hook. |
|
492
|
|
|
* Original string included in $params['original_string'] |
|
493
|
|
|
* |
|
494
|
|
|
* @param string $string Formatted string |
|
495
|
|
|
* @param string $allowable_tags Optional parameter to specify tags which should not be stripped |
|
496
|
|
|
* |
|
497
|
|
|
* @return string String run through strip_tags() and any plugin hooks. |
|
498
|
|
|
*/ |
|
499
|
|
|
function elgg_strip_tags($string, $allowable_tags = null) { |
|
500
|
|
|
$params['original_string'] = $string; |
|
|
|
|
|
|
501
|
|
|
$params['allowable_tags'] = $allowable_tags; |
|
502
|
|
|
|
|
503
|
|
|
$string = strip_tags($string, $allowable_tags); |
|
504
|
|
|
$string = elgg_trigger_plugin_hook('format', 'strip_tags', $params, $string); |
|
505
|
|
|
|
|
506
|
|
|
return $string; |
|
507
|
|
|
} |
|
508
|
|
|
|
|
509
|
|
|
/** |
|
510
|
|
|
* Apply html_entity_decode() to a string while re-entitising HTML |
|
511
|
|
|
* special char entities to prevent them from being decoded back to their |
|
512
|
|
|
* unsafe original forms. |
|
513
|
|
|
* |
|
514
|
|
|
* This relies on html_entity_decode() not translating entities when |
|
515
|
|
|
* doing so leaves behind another entity, e.g. &gt; if decoded would |
|
516
|
|
|
* create > which is another entity itself. This seems to escape the |
|
517
|
|
|
* usual behaviour where any two paired entities creating a HTML tag are |
|
518
|
|
|
* usually decoded, i.e. a lone > is not decoded, but <foo> would |
|
519
|
|
|
* be decoded to <foo> since it creates a full tag. |
|
520
|
|
|
* |
|
521
|
|
|
* Note: This function is poorly explained in the manual - which is really |
|
522
|
|
|
* bad given its potential for misuse on user input already escaped elsewhere. |
|
523
|
|
|
* Stackoverflow is littered with advice to use this function in the precise |
|
524
|
|
|
* way that would lead to user input being capable of injecting arbitrary HTML. |
|
525
|
|
|
* |
|
526
|
|
|
* @param string $string |
|
527
|
|
|
* |
|
528
|
|
|
* @return string |
|
529
|
|
|
* |
|
530
|
|
|
* @author Pádraic Brady |
|
531
|
|
|
* @copyright Copyright (c) 2010 Pádraic Brady (http://blog.astrumfutura.com) |
|
532
|
|
|
* @license Released under dual-license GPL2/MIT by explicit permission of Pádraic Brady |
|
533
|
|
|
* |
|
534
|
|
|
* @access private |
|
535
|
|
|
*/ |
|
536
|
|
|
function _elgg_html_decode($string) { |
|
537
|
|
|
$string = str_replace( |
|
538
|
|
|
array('>', '<', '&', '"', '''), |
|
539
|
|
|
array('&gt;', '&lt;', '&amp;', '&quot;', '&#039;'), |
|
540
|
|
|
$string |
|
541
|
|
|
); |
|
542
|
|
|
$string = html_entity_decode($string, ENT_NOQUOTES, 'UTF-8'); |
|
543
|
|
|
$string = str_replace( |
|
544
|
|
|
array('&gt;', '&lt;', '&amp;', '&quot;', '&#039;'), |
|
545
|
|
|
array('>', '<', '&', '"', '''), |
|
546
|
|
|
$string |
|
547
|
|
|
); |
|
548
|
|
|
return $string; |
|
549
|
|
|
} |
|
550
|
|
|
|
|
551
|
|
|
/** |
|
552
|
|
|
* Prepares query string for output to prevent CSRF attacks. |
|
553
|
|
|
* |
|
554
|
|
|
* @param string $string |
|
555
|
|
|
* @return string |
|
556
|
|
|
* |
|
557
|
|
|
* @access private |
|
558
|
|
|
*/ |
|
559
|
|
|
function _elgg_get_display_query($string) { |
|
560
|
|
|
//encode <,>,&, quotes and characters above 127 |
|
561
|
|
View Code Duplication |
if (function_exists('mb_convert_encoding')) { |
|
562
|
|
|
$display_query = mb_convert_encoding($string, 'HTML-ENTITIES', 'UTF-8'); |
|
563
|
|
|
} else { |
|
564
|
|
|
// if no mbstring extension, we just strip characters |
|
565
|
|
|
$display_query = preg_replace("/[^\x01-\x7F]/", "", $string); |
|
566
|
|
|
} |
|
567
|
|
|
return htmlspecialchars($display_query, ENT_QUOTES, 'UTF-8', false); |
|
568
|
|
|
} |
|
569
|
|
|
|
|
570
|
|
|
return function(\Elgg\EventsService $events, \Elgg\HooksRegistrationService $hooks) { |
|
571
|
|
|
|
|
572
|
|
|
}; |
|
573
|
|
|
|
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.