parse_str

<?

$string = "key=value";

parse_str($string, $result);

echo $result["key"];

?>

value

<?

$string = "my key=value";

parse_str($string, $result);

echo $result["my_key"];

?>

value

<?

$string = "key[]=value1&key[]=value2+value3+value4&key[]=value5";

parse_str($string, $result);

print_r($result["key"]);

echo $result["key"][0] . PHP_EOL;
echo $result["key"][1] . PHP_EOL;
echo $result["key"][2];

?>

Array
(
    [0] => value1
    [1] => value2 value3 value4
    [2] => value5
)
value1
value2 value3 value4
value5