How to Extract Query Parameters from a Url String in PHP

How can I get parameters from a URL string?

You can use the parse_url() and parse_str() for that.

$parts = parse_url($url);
parse_str($parts['query'], $query);
echo $query['email'];

If you want to get the $url dynamically with PHP, take a look at this question:

Get the full URL in PHP

How do I extract query parameters from a URL string in PHP?

You can use parse_url and parse_str like this:

$query = parse_url('http://www.example.com?test=123&random=abc', PHP_URL_QUERY);
parse_str($query, $params);
$test = $params['test'];

parse_url allows to split an URL in different parts (scheme, host, path, query, etc); here we use it to get only the query (test=123&random=abc). Then we can parse the query with parse_str.

Strip off URL parameter with PHP

The safest "correct" method would be:

1. Parse the url into an array with parse_url()
2. Extract the query portion, decompose that into an array using parse_str()
3. Delete the query parameters you want by unset() them from the array
4. Rebuild the original url using http_build_query()

Quick and dirty is to use a string search/replace and/or regex to kill off the value.

Get URL query string parameters

$_SERVER['QUERY_STRING'] contains the data that you are looking for.

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DOCUMENTATION

• php.net: $_SERVER - Manual

PHP - Get indexed URL query string parameters from URL

Try something like this

<?php

$param_names = [
    'amount',
    'category',
    'itemsku',
    'quantity',
];

$data = [];

foreach ($_GET as $key => $val) {

    foreach ($param_names as $param_name) {

        if (strpos($key, $param_name) === 0) {
            $idx = substr($key, strlen($param_name), 1);

            $data[$idx][$param_name] = $val;
        }
    }

}

var_dump($data);

This is the result

array (size=2)
  1 => 
    array (size=3)
      'amount' => string '233.55' (length=6)
      'category' => string 'clothing' (length=8)
      'itemsku' => string '01235654' (length=8)
      'quantity' => string '1' (length=1)
  2 => 
    array (size=4)
      'amount' => string '156.99' (length=6)
      'category' => string 'accessories' (length=11)
      'itemsku' => string '525124' (length=6)
      'quantity' => string '3' (length=1)

PHP - How to get $_GET Parameter without value

Based on your example, simply exploding the = might quickly suits your need.

$url = $_SERVER['REQUEST_URI'];
$parse_url = parse_url($url, PHP_URL_QUERY);
$queryparam = explode("=", $parse_url);
echo $queryparam[0];
/* OUTPUT query */

if (in_array($queryparam[0], $array_of_params)){ ... }

But you can simply achieve the same thing like this:

if (@$_GET["query"] != ""){ ... }

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