Parse array in query string as array and not literally "array"

Question

I have come across a unusual scenario where I need to turn a query string into an array.

The query string comes across as:

?sort%5B0%5D%5Bfield%5D=type&sort%5B0%5D%5Bdir%5D=desc

Which decodes as:

sort[0][field]=type&sort[0][dir]=desc

How do I get this into my PHP as a usable array? i.e.

echo $sort[0][field] ; // Outputs "type"

I have tried evil eval() but with no luck.

I need to explain better, what I need is the literal string of sort%5B0%5D%5Bfield%5D=type&sort%5B0%5D%5Bdir%5D=desc to come into my script and stored as a variable, because it will be passed as a parameter in a function.

How do I do that?

You wouldnt want to run eval on a string you are pulling directly from the query string. That would be a massive security flaw. — gbtimmon
– gbtimmon, Commented Jan 10, 2013 at 14:49

Quentin · Accepted Answer · 2013-01-10 14:40:21Z

2

PHP will convert that format to an array for you.

header("content-type: text/plain");
print_r($_GET);

gives:

Array
(
    [sort] => Array
        (
            [0] => Array
                (
                    [field] => type
                    [dir] => desc
                )

        )

)

If you mean that you have that string as a string and not as the query string input into your webpage, then use the parse_str function to convert it.

header("content-type: text/plain");
$string = "sort%5B0%5D%5Bfield%5D=type&sort%5B0%5D%5Bdir%5D=desc";
$array = Array();
parse_str($string, $array);
print_r($array);

… gives the same output.

answered Jan 10, 2013 at 14:40

Quentin

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2 Comments

imperium2335 Over a year ago

How would i get parse_str() to ignore arrays in the query string?

Quentin Over a year ago

That's exactly the opposite of what you asked for… use $_SERVER['QUERY_STRING'] if you want to get the raw query string.

Christian Koch · Accepted Answer · 2013-01-10 14:45:09Z

0

Use parse_str()

http://php.net/manual/en/function.parse-str.php

<?php
$str = "first=value&arr[]=foo+bar&arr[]=baz";
parse_str($str);
vecho $first;  // value
echo $arr[0]; // foo bar
echo $arr[1]; // baz


parse_str($str, $output);
echo $output['first'];  // value
echo $output['arr'][0]; // foo bar
echo $output['arr'][1]; // baz

?>

answered Jan 10, 2013 at 14:45

Christian Koch

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