PHP HOME
PHP Introduction
PHP SETUP
PHP Syntax
PHP Data Types
PHP Outputs
PHP Variable
PHP Constant
PHP Strings
PHP Operators
PHP if else if
PHP Switch
PHP while loop
PHP for loop
PHP Arrays
PHP Functions
PHP Sorting Array
PHP Form Handling
PHP Form Validation
PHP Form Required
PHP Form URL/EMAIL
PHP Form Submit
PHP Contact Form
PHP DATE & TIME
PHP INCLUDE
PHP FILE HANDLING
PHP FILE OPEN/READ
PHP FILE CREATE/WRITE
PHP FILE UPLOAD
PHP SESSION
PHP COOKIES
PHP FILTER
PHP ERROR HANDLING
PHP EXCEPTION
PHP Redirects
PHP with MySQL
PHP WITH MYSQL DB
MYSQL CONNECT
MYSQL CREATE DATABASE
SELECT DATABASE
MYSQL CREATE TABLE
MYSQL INSERT DATA
MYSQL SELECT DATA
MYSQL UPDATE DATA
MYSQL DELETE DATA
MYSQL ORDER
MYSQL LIMIT
MYSQL LAST ID
Form URL/EMAIL should validate that user enters proper format URL/EMAIL. The easiest way to validate the URL/EMAIL by using below function.
We can check each $_POST variable with the validate_input() function, and the script looks like this:
<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$email = validate_input($_POST["email"]);
$url = validate_input($_POST["url"]);
}
function validate_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
trim() function
Removes whitespace and other predefined characters from both sides of a string
stripslashes() function
Removes backslashes added. This function can be used to clean up data retrieved from an HTML form.
htmlspecialchars() function
convert the predefined charecters like < (less than), > (greater than) etc. in to HTML entities
