Allowed memory size of 33554432 bytes exhausted (t

Question

This error message is being presented, any suggestions?

Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php

Answer 1

It is unfortunately easy to program in PHP in a way that consumes memory faster than you realise. Copying strings, arrays and objects instead of using references will do it, though PHP 5 is supposed to do this more automatically than in PHP 4. But dealing with your data set in entirety over several steps is also wasteful compared to processing the smallest logical unit at a time. The classic example is working with large resultsets from a database: most programmers fetch the entire resultset into an array and then loop over it one or more times with foreach(). It is much more memory efficient to use a while() loop to fetch and process one row at a time. The same thing applies to processing a file.

Answer 2

I have faced same problem in php7.2 with laravel 5.6. I just increase the amount of variable memory_limit = 128M in php.ini as my applications demand. It might be 256M/512M/1048M.....Now it works fine.

Answer 3

We had a similar situation and we tried out given at the top of the answers ini_set('memory_limit', '-1'); and everything worked fine, compressed images files greater than 1MB to KBs.

Answer 4

I was also having the same problem, looked for phpinfo.ini, php.ini or .htaccess files to no avail. Finally I have looked at some php files, opened them and checked the codes inside for memory. Finally this solution was what I come out with and it worked for me. I was using wordpress, so this solution might only work for wordpress memory size limit problem. My solution, open default-constants.php file in /public_html/wp-includes folder. Open that file with code editor, and find memory settings under wp_initial_constants scope, or just Ctrl+F it to find the word "memory". There you will come over WP_MEMORY_LIMIT and WP_MAX_MEMORY_LIMIT. Just increase it, it was 64 MB in my case, I increased it to 128 MB and then to 200 MB.

// Define memory limits.
if ( ! defined( 'WP_MEMORY_LIMIT' ) ) {
    if ( false === wp_is_ini_value_changeable( 'memory_limit' ) ) {
        define( 'WP_MEMORY_LIMIT', $current_limit );
    } elseif ( is_multisite() ) {
        define( 'WP_MEMORY_LIMIT', '200M' );
    } else {
        define( 'WP_MEMORY_LIMIT', '128M' );
    }
}

if ( ! defined( 'WP_MAX_MEMORY_LIMIT' ) ) {
    if ( false === wp_is_ini_value_changeable( 'memory_limit' ) ) {
        define( 'WP_MAX_MEMORY_LIMIT', $current_limit );
    } elseif ( -1 === $current_limit_int || $current_limit_int > 268435456 /* = 256M */ ) {
        define( 'WP_MAX_MEMORY_LIMIT', $current_limit );
    } else {
        define( 'WP_MAX_MEMORY_LIMIT', '256M' );
    }
}

Btw, please don't do the following code, because that's bad practice:

ini_set('memory_limit', '-1');

Answer 5

If you want to read large files, you should read them bit by bit instead of reading them at once.
It’s simple math: If you read a 1 MB large file at once, than at least 1 MB of memory is needed at the same time to hold the data.

So you should read them bit by bit using fopen & fread.

Answer 6

I was receiving the same error message after switching to a new theme in Wordpress. PHP was running version 5.3 so I switched to 7.2. That fixed the issue.