http://php.net/manual/en/function.json-decode.php
It's an JSON object which you would like to convert to an array.
$string = '{ "Age":30, "Weight":80, "Height":180 }';
$array = json_decode($string, true);
echo $array['Age']; // returns 30
Provided that the given string is a valid JSON.
UPDATE
If that doesn't work because the string doesn't contain a valid JSON object (because I see the keys are missing double quotes), you could execute this regex function first:
$string = "{ Age:30, Weight:80, Height:180 }";
$json = preg_replace('/(?<!")(?<!\w)(\w+)(?!")(?!\w)/u', '"$1"', $string); // fix missing quotes
$obj = json_decode($json, true);
echo $obj['Age']; // returns 30
When using the regex above, make sure the string doesn't contain any quotes at all. So make sure that not some keys have quotes and some not. If so, first get rid of all quotes before executing the regex:
str_replace('"', "", $string);
str_replace("'", "", $string);