How does PHPExcel lock columns?

the class library used by the development language: PHP,: PHPExcel
purpose: one of the exported excel, columns does not want to be modified by the user.
Action: the code $objPHPExcel- > getActiveSheet ()-> freezePane ("D1") is used;
result: it is not easy to use. The current column can still be modified at will.

Php
Nov.07,2021
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-64f5-1e4bad4-44e3f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e4bad4-44e3f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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