baoshi-was/public/t.php

<?php
$str = ',1, 2， 3,     4               5';
//$str=preg_replace('/([\s]*)|(，)/i',',',trim($str));
//$str=preg_replace('/[,]{2,}/i',',',$str);
//$str = trim($str,',');
$str=preg_split('/[,， ]+/is', $str);
var_dump($str);