Security¶
Security is a whole matter: it involves implementing measures and best practices to protect your application and its data from malicious attacks and vulnerabilities.
Security risks may be of different nature: data privacy, identity usurpation, resource abuse, privilege escalation, resource access.
Security applies to PHP itself, and also to the application written with it.
<?php
// classic example of a XSS injection
$a = echo $_GET['a'];
?>
