Never concatenate user input into SQL queries. Use PDO or MySQLi prepared statements:
: PHP is a widely used open-source scripting language that is especially suited for web development. The presence of "php" in a URL often indicates that the website is using PHP scripts to generate dynamic content. inurl php id 1 link
This query is primarily used by security researchers and "bug bounty" hunters to identify . Never concatenate user input into SQL queries
Specifically points to the first entry ("1") in that database table. Why is this Link Significant? inurl php id 1 link