Sorry for the trouble, you two, the past two days! Now that the upgrade work of the Linux server has been completed, here are the compiled and upgraded documents shared with everyone_PHP Tutorial

Linux server upgrade steps
1.​ Detect the installation mode of MySQL, Apache, and PHP:
The main purpose of this part is to understand the installation mode of MySQL, Apache, and PHP, so as to choose how to delete the previous old version.
1． MySQL:
# rpm

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