X-Frame-Options is not allowed to use

set

<meta http-equiv="X-Frame-Options" content="deny" />

error

X-Frame-Options may only be set via an HTTP header sent along with a document. It may not be set inside <meta>.

what is the reason

Apr.09,2021

this error is very clear. This header can only be set through HTTP header, not in the meta tag

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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-64f5-1bef5fb-313f4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bef5fb-313f4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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