get method

When using HTML forms you can set the form method parameter to either "GET" (default) or "POST". So, which one to use?

When working with GET method you can access all form variables with the $GET array in PHP and when using POST you can access the variables using $POST as shown in our PHP forms tutorial. No matter which method used you can also access all variables using $_REQUEST array.

When using GET all the submitted information is displayed in the address bar as part of the URL. You will see that as information shown after ? (called a query string), something like:

http://domain.com/script.php?name1=value1&name2=value2

This can be useful for example where you want to be able to bookmark a page with specific query string values. However, the GET method is limited by the length of the URL (2083 characters in Internet Explorer according to Microsoft) and each of the input values must not exceed 100 chars. Obviously you also don't want to use GET when submitting sensitive information like passwords or credit card details as they would show up in the address bar.

The POST method can send a lot of data (usually limited by the server settings) and should be used for every form unless the specific application benefits from the query string in the URL when using GET. No submitted data is shown in the address bar so most browser cannot correctly bookmark pages shown after a HTTP POST method.

There you have it. Unless you need the query string that you get when using the GET method (and aren't effected by it's limits) you should use POST for your forms. If you are submitting any sensitive information that should not be displayed in the address bar the only way to go is with the POST method.

The get method is a SEO friendly method. It makes easier to set up for small, non-secure data. The variables get passed through the URL string, so you don't have to try to attach it to headers or worry about forms.

Request of get method can be bookmarked, can be cached, are faster and have known consequences, so visiting them multiple times is not a problem.