# parse_str

(PHP 4, PHP 5, PHP 7)

parse_str — Parses the string into variables

### Description

parse_str ( string `$encoded_string` [, array `&$result` ] ) : void

Parses `encoded_string` as if it were the query string passed via a URL and sets variables in the current scope (or in the array if `result` is provided).

### Parameters

`encoded_string`

  The input string.

`result`

  If the second parameter `result` is present, variables are stored in this variable as array elements instead.

  Warning

  Using this function without the `result` parameter is highly DISCOURAGED and DEPRECATED as of PHP 7.2.

  Dynamically setting variables in function's scope suffers from exactly same problems as register_globals.

  Read section on security of Using Register Globals explaining why it is dangerous.

### Return Values

No value is returned.

### Changelog

Version | Description
--- | ---
7.2.0 | Usage of parse_str() without a second parameter now emits an `E_DEPRECATED` notice.

### Examples

Example #1 Using parse_str()

`<?php
$str = "first=value&arr[]=foo+bar&arr[]=baz";
// Recommended
parse_str($str, $output);
echo $output['first']; // value
echo $output['arr'][0]; // foo bar
echo $output['arr'][1]; // baz
// DISCOURAGED
parse_str($str);
echo $first; // value
echo $arr[0]; // foo bar
echo $arr[1]; // baz
?>`

Because variables in PHP can't have dots and spaces in their names, those are converted to underscores. Same applies to naming of respective key names in case of using this function with `result` parameter.

Example #2 parse_str() name mangling

`<?php
parse_str("My Value=Something");
echo $My_Value; // Something
parse_str("My Value=Something", $output);
echo $output['My_Value']; // Something
?>`

### Notes

> Note:

> All variables created (or values returned into array if second parameter is set) are already urldecode()d.

> Note:

> To get the current `QUERY_STRING`, you may use the variable $_SERVER['QUERY_STRING']. Also, you may want to read the section on variables from external sources.

> Note:

> The magic_quotes_gpc setting affects the output of this function, as parse_str() uses the same mechanism that PHP uses to populate the $_GET, $_POST, etc. variables.

### See Also

- parse_url() - Parse a URL and return its components
- pathinfo() - Returns information about a file path
- http_build_query() - Generate URL-encoded query string
- urldecode() - Decodes URL-encoded string