Php/docs/function.parse-str
parse_str
(PHP 4, PHP 5, PHP 7)
parse_str — Parses the string into variables
Description
parse_str
( string $string
, array &$result
) : void
Parses 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
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 |
---|---|
8.0.0 | result is no longer optional.
|
7.2.0 | Usage of parse_str() without a second parameter
now emits an |
Examples
Example #1 Using parse_str()
<?php$str = "first=value&arr[]=foo+bar&arr[]=baz";// Recommendedparse_str($str, $output);echo $output['first']; // valueecho $output['arr'][0]; // foo barecho $output['arr'][1]; // baz// DISCOURAGEDparse_str($str);echo $first; // valueecho $arr[0]; // foo barecho $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
<?phpparse_str("My Value=Something");echo $My_Value; // Somethingparse_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