How to set up memory usage in php

How to set the memory used by php: 1. Set the memory by modifying php.ini; 2. By setting htaccess; 3. Modify the memory settings of php at runtime.

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer

How to set the memory used by php?

Set memory_limit

Method 1: php.ini

The simplest or most commonly used method is to modify php.ini

1. First find the php.ini file that is effective for your website. Since there are multiple places where you can set php parameters, finding the correct configuration file and making changes is the first step. If you created a php file using the above method to view its configuration parameters, you can find the "Loaded Configuration File" item.

For Linux users, you can find the corresponding configuration file by executing "php -i | grep Loaded Configuration File". For Windows users, you can try modifying php.ini in your php installation directory.

2. Edit php.ini In php.ini, find the "memory_limit" item. If not, you can add this parameter yourself at the end of the file. The following are some setting examples

memory_limit = 128M; You can change 128M to any value you want to set and save the file

3. Restart the web server. If the web server uses Apache, execute: service httpd restart

In some cases, you may not be allowed to modify php.ini privately. For example, if you purchased a virtual hosting service, but your service provider does not allow you to modify this file. Then, you may want to consider other methods to increase the value of memory_limit.

Method 2: .htaccess

Note: This method only takes effect when php is executed as the Apache module. Find the ".htaccess" file in the root directory of your website. If you don't have one, you can create one yourself. Then put the following configuration into it

php_value memory_limit 128M; you can change 128M to any value you want to set

Method 3: Modify the memory settings of php during runtime

Just add the following command line to your php code.

ini_set('memory_limit','128M');
ini_set('memory_limit',-1); //没有内存限制

Failed to modify memory_limit

If you use a virtual host, there may be a failure to modify the value of memory_limit. You need to contact your service provider to see how to deal with this. Usually they limit the maximum value that can be set or do not allow you to modify it at all. If their environment really cannot meet your requirements, then you may want to consider changing to another hosting provider.

Recommended learning: "PHP Video Tutorial"

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