- stripslashes: documentation ( source)
- unserialize: documentation ( source)
- serialize: documentation ( source)
<?php
$string = <<<STRING
a:6:{s:5:"width";s:4:"3000";s:6:"height";s:4:"2100";s:14:"hwstring_small";s:23:"height=\'89\' width=\'128\'";s:4:"file";s:25:"2012/02/sopa_nicearma.jpg";s:5:"sizes";a:3:{s:9:"thumbnail";a:3:{s:4:"file";s:23:"sopa_nicearma-15x10.jpg";s:5:"width";s:2:"15";s:6:"height";s:2:"10";}s:6:"medium";a:3:{s:4:"file";s:25:"sopa_nicearma-300x210.jpg";s:5:"width";s:3:"300";s:6:"height";s:3:"210";}s:5:"large";a:3:{s:4:"file";s:25:"sopa_nicearma-700x490.jpg";s:5:"width";s:3:"700";s:6:"height";s:3:"490";}}s:10:"image_meta";a:10:{s:8:"aperture";s:1:"0";s:6:"credit";s:0:"";s:6:"camera";s:0:"";s:7:"caption";s:0:"";s:17:"created_timestamp";s:1:"0";s:9:"copyright";s:0:"";s:12:"focal_length";s:1:"0";s:3:"iso";s:1:"0";s:13:"shutter_speed";s:1:"0";s:5:"title";s:0:"";}}
STRING;
$array = unserialize(stripslashes($string));
unset($array['sizes']['thumbnail']);
//print_r($array);
echo "Old: $string\n";
echo "New: " , serialize($array);