PHP $_POST Function
The built-in $_POST function is used to collect values in a form with
method="post".
The $_POST Function
The built-in $_POST function is used to collect values from a form sent with
method="post".
Information sent from a form with the POST method is invisible to others and
has no limits on the amount of information to send.
Note: However, there is an 8 Mb max size for the POST method, by default
(can be changed by setting the post_max_size in the php.ini file).
Example
<form action="welcome.php" method="post">
Name: <input type="text" name="fname" />
Age: <input type="text" name="age" />
<input type="submit" />
</form>
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When the user clicks the "Submit" button, the URL will look
like this:
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http://www.w3schools.com/welcome.php
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The "welcome.php" file can now use the $_POST function to collect form data
(the names of the form fields will automatically be the keys in the $_POST
array):
Welcome <?php echo $_POST["fname"]; ?>!<br />
You are <?php echo $_POST["age"]; ?> years old. |
When to use method="post"?
Information sent from a form with the POST method is invisible to others and
has no limits on the amount of information to send.
However, because the variables are not displayed in the URL, it is not
possible to bookmark the page.
The PHP $_REQUEST Function
The PHP built-in $_REQUEST function contains the contents of both $_GET, $_POST, and $_COOKIE.
The $_REQUEST function can be used to collect form data sent
with both the GET and POST methods.
Example
Welcome <?php echo $_REQUEST["fname"]; ?>!<br />
You are <?php echo $_REQUEST["age"]; ?> years old. |
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