http://www.yahoo.com/'
| .'
Yahoo Server
Search Engine';
| $allowed_tags = array('
','');
| echo $ct->dropHTML($text,$allowed_tags);
| echo $ct->shortText($text,10); |
| ?>
-----------------------------------------------------------------------------------*/
class SDConvertText {
/**************************************************
* this function will activate all functions
* in this class except of shortText function
**************************************************/
function convertAll($str,$allowed_tags){
$str = $this->dropHTML($str,$allowed_tags);
$str = $this->activateLinks($str);
return $str;
}
/****************************************************
* Takes a string, and does the reverse of the PHP
* standard function htmlspecialchars().
****************************************************/
function undo_htmlspecialchars($string) {
$string = preg_replace("/>/i", ">", $string);
$string = preg_replace("/</i", "<", $string);
$string = preg_replace("/"/i", "\"", $string);
$string = preg_replace("/&/i", "&", $string);
return $string;
}
/**************************************************
* this function will activate all links and
* email addresses with tag
**************************************************/
function activateLinks($str) {
$str = eregi_replace('(((f|ht){1}tp://)[-a-zA-Z0-9@:%_\+.~#?&//=]+)', '\\1', $str);
$str = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_\+.~#?&//=]+)', '\\1\\2', $str);
$str = eregi_replace('([_\.0-9a-z-]+@([0-9a-z][0-9a-z-]+\.)+[a-z]{2,3})','\\1', $str);
return $str;
}
/**************************************************
* this function will drop HTML tags except of
* of tag in $allowed_tags varible
* can be also array of tags
**************************************************/
function dropHTML($str,$allowed_tags = ''){
if(is_array($allowed_tags)){
foreach($allowed_tags as $key => $value)
$tags .= $value;
return $str = strip_tags($str,$tags);
}else{
return strip_tags($str,$allowed_tags);
}
}
/**************************************************
* This function shortens text into $length at most.
* If the text is longer, puts an ellipsis at the end.
**************************************************/
function shortText($str,$length){
return strlen($str) > $length ? preg_replace('/\s\S*$/','...',substr($str,0,$length - 3)) : $str;
}
}
?>