- var_dump: documentation ( source)
- json_decode: documentation ( source)
<?php
$string = '{
"123": "application/vnd.lotus-1-2-3",
"3dml": "text/vnd.in3d.3dml",
"3g2": "video/3gpp2",
"3gp": "video/3gpp",
"7z": "application/x-7z-compressed",
"aab": "application/x-authorware-bin"
}';
var_dump(json_decode($string, 1));