PHP Filters are used to sanitize data coming from outside world inside your application.
In the code you've been given, you'll notice a PHP | Chegg.com
PHP Validation Email: How to Check the Correctness of Email
PHP Filters - filter_var(), filter_list() | jobtensor
By default use filter_var() to valid email addresses in Validation. · Issue #3742 · cakephp/cakephp · GitHub
filter_var email php – Ruef
filter_var email php – Ruef
FILTER_VALIDATE_EMAIL is not 100% RFC-conform · Issue #1923 · FriendsOfSymfony/FOSUserBundle · GitHub
XSS in Limited Input Formats - Brute XSS
How To Filter Variable in PHP - filter_var() Function - Tech Fry
php validate email Code Example
How to Validate Email Address in PHP
Data Validation models
MySQL – HTML Form Validation with PHP (filter_var) – Eli the Computer Guy
How To Validate An Email Address Using Php? – Lotus RB
MySQL – HTML Form Validation with PHP (filter_var) – Eli the Computer Guy
How to validate and sanitize user input with PHP? - GeeksforGeeks
filter_var email php – Ruef
PHP Validation Email: How to Check the Correctness of Email
MySQL – HTML Form Validation with PHP (filter_var) – Eli the Computer Guy
How to Validate an Email in PHP | 3 Tips To Follow
GitHub - Xib3rR4dAr/filter-var-sqli: Bypassing FILTER_SANITIZE_EMAIL & FILTER_VALIDATE_EMAIL filters in filter_var for SQL Injection ( xD )
How to Validate an Email Address in PHP – StackHowTo
