- print_r: documentation ( source)
- explode: documentation ( source)
- array_unique: documentation ( source)
<?php
$phones = "89521632782,89521632782,89521632782,12";
$qwerty = array($phones);
$qqwe1 = explode(",", $qwerty);
$result = array_unique($qqwe1);
print_r($qwerty);
?>