SQL injection is a web security vulnerability that allows an attacker to execute arbitrary SQL statements on a database. This can lead to data theft, data manipulation, and even complete website compromise. PHP is a popular programming language used to develop web applications, and it is important to be aware of how to avoid SQL injection vulnerabilities in PHP code.
There are a number of ways to avoid SQL injection vulnerabilities in PHP. One way is to use prepared statements. Prepared statements are a way to send SQL statements to a database without the risk of SQL injection. When using prepared statements, the SQL statement is first compiled by the database server, and then the values for the parameters in the statement are bound to the statement. This prevents the attacker from being able to modify the SQL statement and execute arbitrary SQL code.