PHP distinguishes testing and formal environments by setting system environment variables

1. Introduction

1. In PHP, you can use the getenv() function and $_ENVTo obtain the environment variables

2. The environment variables exist in the system and do not change when the code is submitted

3. If the company has both a test server and a formal server Taiwan, it is a good way to distinguish the test environment and the formal environment through environment variables

4. Safe, don’t worry about submission coverage

2. Setting method

1. Open the etc/profile file: vim ~/etc/profile

Add an environment variableexport PHP_ENV="test ", the official server is set to ="prod"

so that some different operations can be done through system environment variables, or there are different database account passwords

Reload after setting: source ~/etc/profile

2. Modify PHP’s php-fpm.conf file and set the PHP environment variable

Add at the bottom: env[PHP_ENV]=$PHP_ENV

Restart the PHP service, service php-fpm restart

3. What if getenv('PHP_ENV') cannot get the value?

It may be because php.ini does not load the $_ENV variable definition by default. If you check phpinfo() at this time, you will find the environment variables we set. Modify for "no value"

vim /etc/php/php.ini

Modify: variables_order: variables_order="EGPCS"

Restart the PHP service

4. Check phpinfo(), or use the getenv() function to obtain the variable

If you cannot obtain it, you can use$ _ENV; Because the getenv function is no longer supported in version 7.

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