PHP FILTERS

PHP FILTERS

• PHP filters are used to validate and sanitize external input.
• The PHP filter extension has many of the functions needed for checking user input, and is designed to make data validation easier and quicker. 

TYPES OF FILTERS IN PHP :

• Validate filters.
• Sanitize filters.
• Other filters.
• Filter flags.

IMPLEMENT FILTERS IN PHP :

• Create a Directory Structure. 
• Create MySQL Table.
• Insert Data into MySQL Table. 
• Setup MySQL Database Connection. 
• Create a Form to Filter Data. 
• Write Filtering data by Category Script in PHP.
• Display Filtered Data in Table. 
• Test yourself to filter data by Category.

EXAMPLE FOR FILTERS IN PHP :

<?php

$str = "<h1>Hello Nanba!</h1>";

$newstr = filter_var($str, FILTER_SANITIZE_STRING);

echo $newstr;

?>

OUTPUT :

Hello Nanba!