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PHP $_POST

The $_POST variable is used to collect values from a form with method="post".

The $_POST Variable

The $_POST variable is an array of variable names and values sent by the HTTP POST method.

The $_POST variable is used to collect values from a form 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.

Example

<form action="welcome.php" method="post">
Enter your name: <input type="text" name="name" />
Enter your age: <input type="text" name="age" />
<input type="submit" />
</form>

When the user clicks the "Submit" button, the URL will not contain any form data, and will look something like this:

http://www.hamidschool.com/welcome.php

The "welcome.php" file can now use the $_POST variable to catch the form data (notice that the names of the form fields will automatically be the ID keys in the $_POST array):

Welcome <?php echo $_POST["name"]; ?>.<br />
You are <?php echo $_POST["age"]; ?> years old!

Why use $_POST?

• Variables sent with HTTP POST are not shown in the URL
• Variables have no length limit

However, because the variables are not displayed in the URL, it is not possible to bookmark the page.

The $_REQUEST Variable

The PHP $_REQUEST variable contains the contents of both $_GET, $_POST, and $_COOKIE.

The PHP $_REQUEST variable can be used to get the result from form data sent with both the GET and POST methods.

Example

Welcome <?php echo $_REQUEST["name"]; ?>.<br />
You are <?php echo $_REQUEST["age"]; ?> years old!

• Introduction to PHP
• PHP Installation
• PHP Syntax
• PHP Variables
• PHP String
• PHP Operators
• PHP If...Else Statements
• PHP Switch Statement
• PHP Arrays
• PHP Looping
• PHP Functions
• PHP Forms and User Input
• PHP $_GET
• PHP Date
• PHP Include File
• PHP File Handling
• PHP File Upload
• PHP Cookies
• PHP Sessions
• PHP Sending E-mails
• PHP Secure E-mails
• PHP Error Handling
• PHP Exception Handling
• PHP Filter
• PHP MySQL Introduction
• PHP MySQL Connect to a Database
• PHP MySQL Create Database and Tables
• PHP MySQL Insert Into
• PHP MySQL Select
• PHP MySQL The Where Clause
• PHP MySQL Order By Keyword
• PHP MySQL Update
• PHP MySQL Delete From
• PHP Database ODBC

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