how can i extract and add the numbers from a string?

[slimboy007]

how can i extract and add together the numeric values from the string $numbers

 

$numbers = '{"val_a":7,"val_b":5,"val_c":4,"val_d":6,"val_e":5}';

 

[trq]

Considering that string is serialized data.

 

<?php
$numbers = '{"val_a":7,"val_b":5,"val_c":4,"val_d":6,"val_e":5}';
$array = unserialize($numbers);
echo array_sum($array);
?>