How to install mysqli extension in php7

Use the php mysqli extension to operate the mysql database. It is an enhanced version of the mysql extension library. It has improved efficiency and security. It supports object-oriented programming and also provides a process-oriented programming style.

1. Installation steps

1. Find mysqli

2 in the php7.2 ext directory. Enter /usr/local/php7.2/bin/phpize

3 and execute ./configure --with-php-config=/usr/local/php/bin/php-config in the mysqli folder --with-mysqli=/usr/bin/mysql_config

4, make

5, make install

2. Pitfalls encountered

Question 1: If mysql_config cannot be found, it may be that mysql-devel is not installed

Solution steps

1. You need to install the source of MySQL

2. At this time, the relevant repo of MySQL will appear in the /etc/yum.repos.d/ directory

3. yum install mysql-devel

Question 2: When installing mysqli, an error occurs: ext/mysqlnd/mysql_float_to_double.h: No such file or directory

Solution steps

1. vim /home/tmp/php-7.2.11/ext/mysqli/mysqli_api.c (find your installation directory here )

2. Modify the path on line 36 of the file

/ext/mysqlnd/mysql_float_to_double.h

Modify it to

/home/tmp/php -7.2.11/ext/mysqlnd/mysql_float_to_double.h

Recommended learning: php video tutorial

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