PHP Tutorial – $_POST Function

The PHP built-in $_POST function is used to collect values in a form (as name says, you do this with the method=”post”) The information send with POST method is invisible to others (the opposite of the GET method.)

Another difference between the $_GET function and the $_POST function is that the $_POST function doesn’t limit the amount of information that you want to send. (Limit of $_GET is 100 characters.) But you should be aware of the following: by default there is an 8Mb maximum size for the post method. (If you want a larger size you can change it in the php.ini file. The setting is called post_max_size.)

Let’s look at an $_POST example:


<html>
<body>

<form action="test.php" method="post">
Your name: <input type="text" name="yourname" />
<input type="submit" />
</form>

</body>
</html>

If the user clicks on the submit button, the URL called will look like this:



http://www.codingunit.com/test.php

The names of the form fields will automatically be the keys in the $_POST array. So we can use the name “yourname” in the PHP file test.php. For example we can do this:


Welcome <?php echo $_POST["yourname"]; ?>!

That’s all for this tutorial.

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There are currently 5 responses to “PHP Tutorial – $_POST Function”

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  1. Ridip on March 8th, 2011:

    nice. helpful

  2. Pokaran on September 28th, 2011:

    Nice website and very much useful, helped me understanding the basic concept of $_POST function.

    Thanks

  3. Animesh Chandra Bain on March 25th, 2012:

    very helpful tor the basic php learner

  4. Simon's Reyes Blogs on June 11th, 2012:

    Thanks for sharing…

  5. Foroz farhat on February 25th, 2013:

    Thanks nice. helpful