The php page specifies the source page execution?

as the title: there is a js button in the a.php page that triggers the execution of b.php
Q: how to write code in b.php to prevent browsing that is not triggered by the js button in a.php? (without session)

Mar.10,2021

encrypt a regular random parameter from a to b, and decrypt it on b, as long as the decryption key is not made public.

  

check the variable $_ SERVER ['HTTP_REFERER'], but this is not so reliable because it comes from the browser, is easily tampered with (or not sent), and is more reliable than session.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b31dd7-2b546.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b31dd7-2b546.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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