What to do if modifying php.ini does not take effect under Linux

The solution for php.ini not taking effect: first reload the php.ini file and print out "phpinfo();"; then search for the modified configuration; then check the "php-fpm.conf" configuration file; Finally, modify the configuration of "php-fpm".

The main reasons why php.ini modification does not take effect are as follows:
1. After modifying the php.ini configuration file, php is not reloaded. ini configuration file.
2. There are multiple php.ini configuration files
3. The configuration in php.ini is overwritten by the configuration in other files
Problem troubleshooting:
1. After modifying the configuration, reload php.ini file, print out phpinfo(); Check which configuration file is read, and make sure the configuration file you modified is correct. As shown below.

2. Search for the configuration you modified in the printed phpinfo();. Pay attention to Local Value (local variable) and Master Value (main variable). Local Value will Override the value of Master Value. Master Value is the value of your php.ini configuration item, and Local Value may be the value set in the code, as shown below, eg: ini_set('display_errors',true); ,
In addition, Baidu said that the settings of php.ini can be rewritten in the Apache configuration file, which may be in conf/httpd.conf or conf.d/**.conf, usually in conf. d/php.conf, but the conf.d file is not found under Windows. There may be a conf.d file under the Linux version of apache.

3. In the Linux environment, php-fpm has not been included in php before php5.3.3. The configuration of php is basically in php.ini. In php5.3.3 and later, except in php.ini In addition to configuration, you can also configure it in php-fpm.conf, and php-fpm.conf has a higher priority than php.ini.
Check the php-fpm.conf configuration file, or whether the configuration in the php-fpm.d/.conf file covers the configuration in php.ini. The configuration example of php-fpm is as follows: php_value[ session.save_handler] = redis php_value[session.save_path] = "tcp://***.***.***.***:6379?auth=***"

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