w3resource

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

php-string-parse_str()

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 Function Reference

Previous: ord
Next: print



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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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