How to increase php memory?

When running a PHP program, you will usually encounter the error "Fatal Error: Allowed memory size of xxxxxx bytes exhausted". This means that the PHP script uses too much memory, and exceeds the maximum allowed memory set by the system. To solve this problem, you first need to check whether your program has allocated too much memory. If there are no problems with the program, you can increase PHP's memory limit (memory_limit) through the following methods.

Check the memory limit value of php
In order to check this value, you need to create an empty php file, such as view-php-info.php. Then paste the code inside.

<?php 
phpinfo(); 
?>

Put this script on your web server and call it in your browser. At this time you can see your PHP environment configuration information, part of which is about "memory_limit"

Note: You can use this method to view other parameter settings of PHP, not only is memory_limit.

What should the memory_limit be set to?

This completely depends on the requirements of your application. For example, WordPress requires 32MB to run the core code. Drupal 6 requires this value to be at least 16MB, and recommends setting it to 32MB. If you install a lot of plug-ins, especially those that require image processing, you may need 128MB or more memory.

How to set memory_limit?

Method 1: .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 2: Modify the memory settings of php during runtime
Just add the following command line to your php code.

ini_set('memory_limit','128M');
memory_limit修改失败

Method 3: php.ini
The simplest or most commonly used method is to modify php.ini
1. First find the php that is effective for your website .ini file Since there are multiple places where PHP parameters can be set, 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. The following is an example:

For Linux users, you can execute "php -i | grep Loaded Configuration File" to find the corresponding 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:

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.

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 help you handle this.

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