how to clean link using php

function clickable_link($var)
{
$text = $var;
$text = preg_replace('#(script|about|applet|activex|chrome):#is', "\\1:", $text);
$ret = ' ' . $text;
$ret = preg_replace("#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1\\2", $ret);
$ret = preg_replace("#(^|[\n ])((www|ftp)\.[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1\\2", $ret);
$ret = preg_replace("#(^|[\n ])([a-z0-9&\-_.]+?)@([\w\-]+\.([\w\-\.]+\.)*[\w]+)#i", "\\1\\2@\\3", $ret);
$ret = substr($ret, 1);
return $ret;
}

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how to check ban-word user in put using php

function banned_words_chk($phrase)
{
global $conn, $config;
$query = "SELECT word from bans_words";
$executequery = $conn->Execute($query);
$bwords = $executequery->getarray();
$found = 0;
$words = explode(" ", $phrase);
foreach($words as $word)
{
foreach($bwords as $bword)
{
if($word == $bword[0])
{
$found++;
}
else
{
$pos2 = strpos($word, $bword[0]);
if($pos2 !== false)
{
$found++;
}
}
}
}
if($found > 0)
{
return true;
}
else
{
return false;
}
}
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if you helpful my code please donate some few amount to
developing and free to post.
-------------------------------------------------------------