- strpos: documentation ( source)
<?php
$string='produk_kemeja';
$pos=0;
$count=0;
while(($pos = strpos($string, 'produk_',$pos)) !== FALSE){
$count++;
$pos++;
if((strpos($string, 'produk_')) !== FALSE){
echo $pos;
}
// This ends
}
echo $count;