// must be ing format (no space). // By default htmlawed rewrites tags to this format. // if PHP supported conditional negative lookbehinds we could use this: // $r = preg_replace_callback('/(?"\'\!\(\),]+)/i', // // we can put , in the list of excluded char but need to keep . because of domain names. // it is removed in the callback. $r = preg_replace_callback('/(?"\'\!\(\),]+)/i', create_function( '$matches', ' $url = $matches[1]; $period = \'\'; if (substr($url, -1, 1) == \'.\') { $period = \'.\'; $url = trim($url, \'.\'); } $urltext = str_replace("/", "/", $url); return "$urltext$period"; ' ), $text); return $r; } /** * Create paragraphs from text with line spacing * Borrowed from Wordpress. * * @param string $pee The string * @param bool $br Add BRs? * * @todo Rewrite * @return string **/ function autop($pee, $br = 1) { $pee = $pee . "\n"; // just to make things a little easier, pad the end $pee = preg_replace('|
\s*
|', "\n\n", $pee); // Space things out a little $allblocks = '(?:table|thead|tfoot|caption|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|form|map|area|blockquote|address|math|style|input|p|h[1-6]|hr)'; $pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee); $pee = preg_replace('!()!', "$1\n\n", $pee); $pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-platform newlines if (strpos($pee, ']*)>\s*|', "", $pee); // no pee inside object/embed $pee = preg_replace('|\s*\s*|', '', $pee); } $pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of duplicates $pee = preg_replace('/\n?(.+?)(?:\n\s*\n|\z)/s', "

$1

\n", $pee); // make paragraphs, including one at the end $pee = preg_replace('|

\s*?

|', '', $pee); // under certain strange conditions it could create a P of entirely whitespace $pee = preg_replace('!

([^<]+)\s*?(]*>)!', "

$1

$2", $pee); $pee = preg_replace('|

|', "$1

", $pee); $pee = preg_replace('!

\s*(]*>)\s*

!', "$1", $pee); // don't pee all over a tag $pee = preg_replace("|

(|", "$1", $pee); // problem with nested lists $pee = preg_replace('|

]*)>|i', "

", $pee); $pee = str_replace('

', '

', $pee); $pee = preg_replace('!

\s*(]*>)!', "$1", $pee); $pee = preg_replace('!(]*>)\s*

!', "$1", $pee); if ($br) { $pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', create_function('$matches', 'return str_replace("\n", "", $matches[0]);'), $pee); $pee = preg_replace('|(?)\s*\n|', "
\n", $pee); // optionally make line breaks $pee = str_replace('', "\n", $pee); } $pee = preg_replace('!(]*>)\s*
!', "$1", $pee); $pee = preg_replace('!
(\s*]*>)!', '$1', $pee); //if (strpos($pee, '. Only there because of the comment. // $pee = preg_replace_callback('!()(.*?)!is', 'clean_pre', $pee ); //} $pee = preg_replace("|\n

$|", '

', $pee); return $pee; } /** * Returns an excerpt. * Will return up to n chars stopping at the nearest space. * If no spaces are found (like in Japanese) will crop off at the * n char mark. Adds ... if any text was chopped. * * @param string $text The full text to excerpt * @param int $num_chars Return a string up to $num_chars long * * @return string * @since 1.7.2 */ function elgg_get_excerpt($text, $num_chars = 250) { $text = trim(elgg_strip_tags($text)); $string_length = elgg_strlen($text); if ($string_length <= $num_chars) { return $text; } // handle cases $excerpt = elgg_substr($text, 0, $num_chars); $space = elgg_strrpos($excerpt, ' ', 0); // don't crop if can't find a space. if ($space === FALSE) { $space = $num_chars; } $excerpt = trim(elgg_substr($excerpt, 0, $space)); if ($string_length != elgg_strlen($excerpt)) { $excerpt .= '...'; } return $excerpt; } /** * Handles formatting of ampersands in urls * * @param string $url The URL * * @return string * @since 1.7.1 */ function elgg_format_url($url) { return preg_replace('/&(?!amp;)/', '&', $url); } /** * Converts an associative array into a string of well-formed attributes * * @note usually for HTML, but could be useful for XML too... * * @param array $attrs An associative array of attr => val pairs * * @return string HTML attributes to be inserted into a tag (e.g., ) */ function elgg_format_attributes(array $attrs) { $attrs = elgg_clean_vars($attrs); $attributes = array(); if (isset($attrs['js'])) { //@todo deprecated notice? if (!empty($attrs['js'])) { $attributes[] = $attrs['js']; } unset($attrs['js']); } foreach ($attrs as $attr => $val) { $attr = strtolower($attr); if ($val === TRUE) { $val = $attr; //e.g. checked => TRUE ==> checked="checked" } // ignore $vars['entity'] => ElggEntity stuff if ($val !== NULL && $val !== false && (is_array($val) || !is_object($val))) { // allow $vars['class'] => array('one', 'two'); // @todo what about $vars['style']? Needs to be semi-colon separated... if (is_array($val)) { $val = implode(' ', $val); } $val = htmlspecialchars($val, ENT_QUOTES, 'UTF-8', false); $attributes[] = "$attr=\"$val\""; } } return implode(' ', $attributes); } /** * Preps an associative array for use in {@link elgg_format_attributes()}. * * Removes all the junk that {@link elgg_view()} puts into $vars. * Maintains backward compatibility with attributes like 'internalname' and 'internalid' * * @note This function is called automatically by elgg_format_attributes(). No need to * call it yourself before using elgg_format_attributes(). * * @param array $vars The raw $vars array with all it's dirtiness (config, url, etc.) * * @return array The array, ready to be used in elgg_format_attributes(). * @access private */ function elgg_clean_vars(array $vars = array()) { unset($vars['config']); unset($vars['url']); unset($vars['user']); // backwards compatibility code if (isset($vars['internalname'])) { $vars['name'] = $vars['internalname']; unset($vars['internalname']); } if (isset($vars['internalid'])) { $vars['id'] = $vars['internalid']; unset($vars['internalid']); } if (isset($vars['__ignoreInternalid'])) { unset($vars['__ignoreInternalid']); } if (isset($vars['__ignoreInternalname'])) { unset($vars['__ignoreInternalname']); } return $vars; } /** * Converts shorthand urls to absolute urls. * * If the url is already absolute or protocol-relative, no change is made. * * @example * elgg_normalize_url(''); // 'http://my.site.com/' * elgg_normalize_url('dashboard'); // 'http://my.site.com/dashboard' * elgg_normalize_url('http://google.com/'); // no change * elgg_normalize_url('//google.com/'); // no change * * @param string $url The URL to normalize * * @return string The absolute url */ function elgg_normalize_url($url) { // see https://bugs.php.net/bug.php?id=51192 // from the bookmarks save action. $php_5_2_13_and_below = version_compare(PHP_VERSION, '5.2.14', '<'); $php_5_3_0_to_5_3_2 = version_compare(PHP_VERSION, '5.3.0', '>=') && version_compare(PHP_VERSION, '5.3.3', '<'); $validated = false; if ($php_5_2_13_and_below || $php_5_3_0_to_5_3_2) { $tmp_address = str_replace("-", "", $url); $validated = filter_var($tmp_address, FILTER_VALIDATE_URL); } else { $validated = filter_var($url, FILTER_VALIDATE_URL); } // work around for handling absoluate IRIs (RFC 3987) - see #4190 if (!$validated && (strpos($url, 'http:') === 0) || (strpos($url, 'https:') === 0)) { $validated = true; } if ($validated) { // all normal URLs including mailto: return $url; } elseif (preg_match("#^(\#|\?|//)#i", $url)) { // '//example.com' (Shortcut for protocol.) // '?query=test', #target return $url; } elseif (stripos($url, 'javascript:') === 0) { // 'javascript:' // Not covered in FILTER_VALIDATE_URL return $url; } elseif (preg_match("#^[^/]*\.php(\?.*)?$#i", $url)) { // 'install.php', 'install.php?step=step' return elgg_get_site_url() . $url; } elseif (preg_match("#^[^/]*\.#i", $url)) { // 'example.com', 'example.com/subpage' return "http://$url"; } else { // 'page/handler', 'mod/plugin/file.php' // trim off any leading / because the site URL is stored // with a trailing / return elgg_get_site_url() . ltrim($url, '/'); } } /** * When given a title, returns a version suitable for inclusion in a URL * * @param string $title The title * * @return string The optimised title * @since 1.7.2 */ function elgg_get_friendly_title($title) { // return a URL friendly title to short circuit normal title formatting $params = array('title' => $title); $result = elgg_trigger_plugin_hook('format', 'friendly:title', $params, NULL); if ($result) { return $result; } // @todo not using this because of locale concerns //$title = iconv('UTF-8', 'ASCII//TRANSLIT', $title); // @todo this uses a utf8 character class. can use if // we want to support utf8 in the url. //$title = preg_replace('/[^\p{L}\- ]/u', '', $title); // use A-Za-z0-9_ instead of \w because \w is locale sensitive $title = preg_replace("/[^A-Za-z0-9_\- ]/", "", $title); $title = str_replace(" ", "-", $title); $title = str_replace("--", "-", $title); $title = trim($title); $title = elgg_strtolower($title); return $title; } /** * Formats a UNIX timestamp in a friendly way (eg "less than a minute ago") * * @see elgg_view_friendly_time() * * @param int $time A UNIX epoch timestamp * * @return string The friendly time string * @since 1.7.2 */ function elgg_get_friendly_time($time) { // return a time string to short circuit normal time formatting $params = array('time' => $time); $result = elgg_trigger_plugin_hook('format', 'friendly:time', $params, NULL); if ($result) { return $result; } $diff = time() - (int)$time; $minute = 60; $hour = $minute * 60; $day = $hour * 24; if ($diff < $minute) { return elgg_echo("friendlytime:justnow"); } else if ($diff < $hour) { $diff = round($diff / $minute); if ($diff == 0) { $diff = 1; } if ($diff > 1) { return elgg_echo("friendlytime:minutes", array($diff)); } else { return elgg_echo("friendlytime:minutes:singular", array($diff)); } } else if ($diff < $day) { $diff = round($diff / $hour); if ($diff == 0) { $diff = 1; } if ($diff > 1) { return elgg_echo("friendlytime:hours", array($diff)); } else { return elgg_echo("friendlytime:hours:singular", array($diff)); } } else { $diff = round($diff / $day); if ($diff == 0) { $diff = 1; } if ($diff > 1) { return elgg_echo("friendlytime:days", array($diff)); } else { return elgg_echo("friendlytime:days:singular", array($diff)); } } } /** * Strip tags and offer plugins the chance. * Plugins register for output:strip_tags plugin hook. * Original string included in $params['original_string'] * * @param string $string Formatted string * * @return string String run through strip_tags() and any plugin hooks. */ function elgg_strip_tags($string) { $params['original_string'] = $string; $string = strip_tags($string); $string = elgg_trigger_plugin_hook('format', 'strip_tags', $params, $string); return $string; }