PHP: parse_str() function
Description
The parse_str() function parses a query string into variables.
Version:
(PHP 4 and above)
Syntax:
parse_str(input_string, var_array)
Parameter:
Name | Description | Required / Optional |
Type |
---|---|---|---|
input_string | The input string. | Required | String |
var_array | If present, it stores variables as array elements. | Optional | Array |
Return value:
No value is returned.
Pictorial Presentation
Example:
<?php
parse_str('id=100&name=nicholas%20haddin');
echo $id.'<br>';
echo $name;
?>
Output:
100 nicholas haddin
View the example in the browser
See also
PHP: Tips of the Day
Getting all defined constants
To get all defined constants including those created by PHP use the get_defined_constants function:
Example:
<?php $constants = get_defined_constants(); var_dump($constants); // pretty large list
Output:
array(2250) { ["E_ERROR"]=> int(1) ["E_RECOVERABLE_ERROR"]=> int(4096) ["E_WARNING"]=> ..... ..... resource(1) of type (stream) ["STDOUT"]=> resource(2) of type (stream) ["STDERR"]=> resource(3) of type (stream) }
To get only those constants that were defined by your app call the function at the beginning and at the end of your script (normally after the bootstrap process):
<?php $constants = get_defined_constants(); define("HELLO", "hello"); define("WORLD", "world"); $new_constants = get_defined_constants(); $myconstants = array_diff_assoc($new_constants, $constants); var_export($myconstants);
Output:
array ( 'HELLO' => 'hello', 'WORLD' => 'world', )
It's sometimes useful for debugging
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