PHP Decode

<?php 
function UserLine($file, $searchfor, $option){ 
	$contents = file_get_contents($file); 
	$pattern = preg_quote($searchfor, '/'); 
	$pattern = "/^.*$pattern.*\$/m"; 
	 
	if(preg_match_all($pattern, $contents, $matches)){ 
		$Line = $matches[0][0]; 
		if($option == "Check"){ 
			return true; 
		} 
		elseif($option == "line"){ 
			return $Line; 
		} 
		elseif($option == "pwd"){ 
			$pwd = explode(" ", $Line); 
			return $pwd[2]; 
		} 
		elseif($option == "exp"){ 
			$exp = explode("enddate=", $Line); 
			$exp2 = explode(";", $exp[1]); 
			return strtotime($exp2[0]); 
		} 
	} 
	else{ 
		return false; 
	} 
} 
 
function UpdateFile($file, $searchfor){ 
	$contents = file_get_contents($file); 
	$lines = explode("
", $contents); 
	$exclude = array(); 
	$pattern = '/('.$searchfor.')/im'; 
 
	foreach ($lines as $key => $value) { 
		if (!preg_match($pattern, $value)) { 
			$exclude[] = $value; 
		} 
	} 
	$res = implode("
", $exclude); 
	return file_put_contents($file, $res); 
} 
 
function DisplayError($errMsg){ 
	echo '<div class="row"><div class="input-group input-group-icon referer-warning"> '.$errMsg.'</div></div>'; 
} 
 
function clean($var){ 
	$nvar = trim(htmlspecialchars($var)); 
	$banned_chars = array("ports", "port", "cccam", "mgcamd", "http", "default", "editor", "restart", "yes", "cache", "profiles", "profile" , "enddate", "quot"); 
	return str_ireplace($banned_chars, "", preg_replace("![^a-z0-9]+!i", "", $nvar)); 
} 
?>