The script used more memory than permitted.
WHAT IT MEANS
PHP reached its memory limit and stopped.
THE IMMEDIATE FIX
cPanel > MultiPHP INI Editor. Raise memory_limit to 256M.
For WordPress, also add to wp-config.php:
define('WP_MEMORY_LIMIT', '256M');WHAT USUALLY CAUSES IT
A heavy plugin Image processing, which is memory-intensive A large import or export A query loading an enormous result set Too many plugins together
THE REAL FIX
Raising the limit treats the symptom. If an ordinary page load needs 512M, something is wrong.
Find what consumes it: a profiling tool shows memory use per plugin.
IF IT HAPPENS DURING A SPECIFIC OPERATION
An import, a backup, a bulk update. Raise the limit temporarily for that operation, then investigate why it needs so much.
IF IT HAPPENS ON ORDINARY PAGES
Something is genuinely wrong. Disable plugins to find which, or profile the site.
THE ERROR NAMES A FILE
That file is where memory ran out, not necessarily what consumed it. The cause is usually earlier.
