Linux-root, use Crontab to execute PHP script, 777 folder is_writable but return not writable, command line run this script no problem?

Linux root, using crontab to execute PHP script, 777 folder is_writable but return is not writable, command line directly run this script no problem, how is this going?

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Linux root, using crontab to execute PHP script, 777 folder is_writable but return is not writable, command line directly run this script no problem, how is this going?

You're using crontab, which means that permissions should be crontab!
You first write the file with root, and then write the same file with Crontab no permissions.

You can use Curl to execute PHP

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