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[SOLVED] Using de-hacking functions


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Im trying to filter hacking attempts on this form but keep getting this error message:


Fatal error: Call to undefined function safe_ouput() in \get_post.php on line 14


What am I doing wrong??



function safe_output($string) {

$string = trim($string);
$string = strip_tags($string);
$string = htmlspecialchars($string);
return $string;

if ($_GET ['action'] == 'send') {

echo ('Data = '.safe_ouput($_GET['keyword']));


<form method="get" action ="get_post.php">
<legend>Programming Form</legend><br>
<input type="text" name ="keyword" size ="25"><br><br>
<input type="submit" name ="action" value ="send">

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