Get Parameters From a URL String in PHP

  1. Use parse_url() and parse_str() Functions to Get Parameters From a URL String in PHP
  2. Use $_GET Variable to Get Parameters From a URL String in PHP

This article will introduce methods to get parameters from a URL string in PHP.

  • Using parse_url() function
  • Using parse_str() function
  • Using $_GET variable

Use parse_url() and parse_str() Functions to Get Parameters From a URL String in PHP

We can use the built-in functions parse_url() and parse_str() functions to get parameters from a URL string. These functions are used together to get the parameters. The function parse_url will divide the URL into different parameters. After that parse_string will get the required parameter.

The correct syntax to use parse_url() functions is as follows

parse_url( $url, $component);

The built-in function parse_url has two parameters. The details of its parameters are as follows

Parameters Description
$url mandatory It is the URL we want to get parameter from.
$component optional It is used to get a specific URL component.

This function returns components of a URL. If our URL is not correctly formatted, the function may return False.

The correct syntax to use the parse_str() function is as follows

parse_str( $string, $result);

The built-in function parse_str has two parameters. The details of its parameters are as follows.

Parameters Description
$string mandatory It is the input string that is converted to the variables.
$result mandatory If this parameter is passed, the variables are stored in it.

This function returns nothing.

The program below shows how we can use these functions to get parameters from a URL string.

<?php 
$url = "https://testurl.com/test/1234?email=abc@test.com&name=sarah";
$components = parse_url($url);
parse_str($components['query'], $results);
print_r($results); 
?> 

Output:

Array
(
    [email] => abc@test.com
    [name] => sarah
)

Now, if we want to get the email parameter only, we will do the following changes in our program:

<?php 
$url = "https://testurl.com/test/1234?email=abc@test.com&name=sarah";
$components = parse_url($url);
parse_str($components['query'], $results);
echo($results['email']); 
?> 

Output:

abc@test.com

We can also pass $component parameter to parse_url() function.

<?php 
$url = "https://testurl.com/test/1234?email=abc@test.com&name=sarah";
$components = parse_url($url, PHP_URL_QUERY);
//$component parameter is PHP_URL_QUERY
parse_str($components, $results);
print_r($results); 
?> 

Output:

Array
(
    [email] => abc@test.com
    [name] => sarah
)

Use $_GET Variable to Get Parameters From a URL String in PHP

In PHP, we can also use the $_GET variable to get parameters from a URL string. It is a superglobals variable, which means that it is available in all scopes. This variable gets the data i.e URL, from an HTML form.

Assuming that the URL from form is https://testurl.com/test/1234?email=abc@test.com&name=sarah . The program that uses this variable to get parameters from a URL string is as follows.

<?php 
echo $_GET['email'] . $_GET['name']
?> 

Output:

abc@test.com
sarah
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