What considerations should be taken into account when setting up a PHP-based cron job for automated file deletion in a server directory?

When setting up a PHP-based cron job for automated file deletion in a server directory, it is important to ensure that the script is secure and only deletes the intended files. Considerations should include setting appropriate file permissions, validating input to prevent malicious file deletion, and testing the script thoroughly before scheduling it as a cron job. 

<?php
$directory = '/path/to/server/directory/';
$files = glob($directory . '*');
foreach($files as $file){
    if(is_file($file) && filemtime($file) < strtotime('-1 day')){
        unlink($file);
    }
}
?>

Keywords

cron job PHP automated file deletion server directory considerations

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