GET URL parameter in PHP

by

$_GET is not a function or language construct—it’s just a variable (an array). Try:

<?php
echo $_GET['link'];

In particular, it’s a superglobal: a built-in variable that’s populated by PHP and is available in all scopes (you can use it from inside a function without the global keyword).

Since the variable might not exist, you could (and should) ensure your code does not trigger notices with:

<?php
if (isset($_GET['link'])) {
    echo $_GET['link'];
} else {
    // Fallback behaviour goes here
}

Alternatively, if you want to skip manual index checks and maybe add further validations you can use the filter extension:

<?php
echo filter_input(INPUT_GET, 'link', FILTER_SANITIZE_URL);

Last but not least, you can use the null coalescing operator (available since PHP/7.0) to handle missing parameters:

echo $_GET['link'] ?? 'Fallback value';

More Related Contents:

  1. nginx redirect loop, remove index.php from url
  2. Change WordPress Admin URL
  3. How do I send to the current page? [closed]
  4. How can I check if a URL exists via PHP?
  5. PHP generate file for download then redirect
  6. Why is the hash part of the URL not available on the server side?
  7. PHP Session timeout
  8. PHP Redirect to another page after form submit
  9. How to get URL of current page in PHP [duplicate]
  10. Check whether image exists on remote URL
  11. What is the best way to check if a URL exists in PHP?
  12. How to get the value after the hash in “somepage.php#name”?
  13. Extract URL from string
  14. Redirect to page and send custom HTTP headers
  15. Need a good regex to convert URLs to links but leave existing links alone
  16. Using PHP Replace SPACES in URLS with %20
  17. What are fragment URLs and why to use them?
  18. PHP Header Redirect in a new window?
  19. Redirect after Login on WordPress
  20. Get current URL path with query string in PHP [duplicate]
  21. Get parts of URL in PHP
  22. How to redirect back to form with input – Laravel 5
  23. What is the best way to notify a user after an access_control rule redirects?
  24. URL Decoding in PHP
  25. get url content PHP [duplicate]
  26. How to properly create HTML links in PHP?
  27. Redirect to ‘www’ before ssl requirement
  28. How to cause a redirect to occur before php script finishes?
  29. How do I apply URL normalization rules in PHP?
  30. Detecting a url using preg_match? without http:// in the string

Leave a Comment