If you ship PHP for a living, you will meet this fatal error sooner or later:

PHP Fatal error: Allowed memory size of 134217728 bytes exhausted ( tried to allocate 4096 bytes ) in /var/www/app/Services/ReportBuilder.php on line 88

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In Laravel, the "allowed memory size exhausted" error usually hides inside storage/logs/laravel.log while your users just see a 500 page. In WordPress it is a white screen of death, or a 500 on admin-ajax during a backup, import, or page-builder save. In Composer it kills dependency installs mid-resolution. The error means one PHP process asked for more RAM than its memory_limit allows — and the fix is almost never just "raise the number and hope".…