What potential issue is the user facing with passing variables through links in the PHP script?

The potential issue the user is facing with passing variables through links in a PHP script is that the variables may not be properly sanitized, leading to security vulnerabilities such as SQL injection or cross-site scripting attacks. To solve this issue, it is important to sanitize and validate any user input before using it in the script. 

// Example of sanitizing and validating input before passing variables through links
$id = isset($_GET['id']) ? intval($_GET['id']) : 0; // Sanitize the 'id' parameter as an integer
$name = isset($_GET['name']) ? htmlspecialchars($_GET['name']) : ''; // Sanitize the 'name' parameter as HTML entities

// Use the sanitized variables in the link
echo "<a href='example.php?id=$id&name=$name'>Link</a>";

Keywords

variable passing links PHP script GET method URL parameters

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