Generally speaking, the file permissions are 755, which means that all permissions are open to you, and other users have read and execute rights but no write rights. If you ask whether the directory needs execution permissions, of course, it does. If the directory does not have execution permissions, you cannot enter the directory at all (you can open the directory as an execution directory). If the PHP file you are referring to does not require execution permissions, or the one above, 755 is enough.
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Generally speaking, the file permissions are 755, which means that all permissions are open to you, and other users have read and execute rights but no write rights.
If you ask whether the directory needs execution permissions, of course, it does. If the directory does not have execution permissions, you cannot enter the directory at all (you can open the directory as an execution directory).
If the PHP file you are referring to does not require execution permissions, or the one above, 755 is enough.