MySQL – Sanitize Variables with PHP (filter_var) – Eli the Computer Guy
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filter_var(): Unknown filter with ID 1172747872 · Issue #9461 · php/php-src · GitHub
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Php
Sonar Research on Twitter: "Be careful when using filter_var() for validating user input. Can you spot the vulnerability? #PHP #coding #codechallenge https://t.co/NM8r7DLl0k" / Twitter
php - Does chaining filter_input() and filter_var() cause the problem? - Stack Overflow
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Email Validation in PHP Free Source code and Tutorial - iNetTutor.com
Email Address Format, PHP filter_var Function And RFC 5321 - DEV Community 👩💻👨💻
Code ABC's
PHP Filters are used to sanitize data coming from outside world inside your application.