Running php files on cron results in 644 permissions for files created

If you set up crontab and run cron on Amazon Linux, the file created will have 644 permissions.I'd like to create 664 files, which Linux settings should I change?I can do it by specifying permission and umask in the php file, but I would like to change it to Linux settings.

If you change the umask of the cron running user to 002, the file created after cron running will be permission 644.

I don't understand why the file created by running the php file through cron does not become the umask002 that I set first.

crontab

 2701**/usr/bin/php/aaa/index.php

index.php

<?php
    $file="/data/bbb.txt";
    $string = "Hello, PHP";
    file_put_contents($file,$string);