Are there any security considerations to keep in mind when using shell_exec in PHP?

When using shell_exec in PHP, it is important to be cautious of potential security vulnerabilities. This function allows for the execution of shell commands, which can be exploited if user input is not properly sanitized. To mitigate this risk, always validate and sanitize user input before passing it to shell_exec to prevent command injection attacks. 

$user_input = $_POST['user_input'];
$sanitized_input = escapeshellarg($user_input);
$output = shell_exec("command " . $sanitized_input);

Keywords

shell_exec security considerations PHP command execution vulnerabilities

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