- var_dump: documentation ( source)
- explode: documentation ( source)
- trim: documentation ( source)
<?php
$parsedValue = trim(" 0% (0/44) ");
$exploded = explode(" ",$parsedValue);
$percentage = $exploded[0];
$parsedValue = trim($exploded[1], "()");
$parsedValue = explode("/", $parsedValue);
$parsedValue = (float) $parsedValue[0] / $parsedValue[1];
var_dump($parsedValue);