Türkiye Telefon Numarası Formatı ve Doğrulama

<html><head>
 <meta http-equiv="content-type" content="text/html; charset=UTF-8">
 <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
 <script type="text/javascript" src="http://cloud.github.com/downloads/digitalBush/jquery.maskedinput/jquery.maskedinput-1.3.min.js"></script>
<script type="text/javascript">//<![CDATA[ 
$(window).load(function(){
$("#phone").mask("+?99 (999)-999-99-99");
$("#phone").on("blur", function() {
 var last = $(this).val().substr( $(this).val().indexOf("-") + 1 );
 
 if( last.length == 3 ) {
 var move = $(this).val().substr( $(this).val().indexOf("-") - 1, 1 );
 var lastfour = move + last;
 
 var first = $(this).val().substr( 0, 9 );
 
 $(this).val( first + '-' + lastfour );
 }
});
});//]]> 
</script>
</head>
<body>
<form action="" method="get">
 <input type="text" name="tel" id="phone" value="90">
 </form>
</body></html>

<?php
function tel($num) {
$nums=str_replace(array("+"," ","(",")","-"),array("00","","","",""),$num);
if(is_numeric($nums) AND strlen($nums) == 14){
return $num;
}else{
return false;
}
}
function num($num) {
$num=str_replace(array("+"," ","(",")","-"),array("00","","","",""),$num);
if(is_numeric($num) AND strlen($num) == 14){
$num = preg_replace('/[^0-9]/', '', $num);
return $num;
}else{
return false;
}
}
echo tel($_GET["tel"]);
echo "<br>";
echo num($_GET["tel"]);
?>