What potential issues could arise when using system commands in PHP?

One potential issue when using system commands in PHP is the risk of command injection, where an attacker can manipulate input to execute arbitrary commands on the server. To mitigate this risk, it is important to sanitize and validate user input before passing it to system commands. 

$user_input = $_POST['user_input'];
$validated_input = escapeshellarg($user_input);
system("command $validated_input");

Keywords

system commands PHP security vulnerabilities shell injection escapeshellarg

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