🐘 PHP errors

PHP fatal errors, warnings, parse errors and configuration limits.

Code	Error	What it means
Allowed memory size exhausted	PHP Fatal error: Allowed memory size of X bytes exhausted	The script tried to use more memory than PHP’s `memory_limit` allows.
Maximum execution time	PHP Fatal error: Maximum execution time of 30 seconds exceeded	The script ran longer than `max_execution_time` and PHP stopped it.
Call to undefined function	PHP Fatal error: Uncaught Error: Call to undefined function	PHP can’t find the function you called — usually a missing extension, missing include, or namespace issue.
Class not found	PHP Fatal error: Uncaught Error: Class "X" not found	PHP couldn’t load the class — autoloading failed, the namespace is wrong, or the dependency isn’t installed.
Parse error	PHP Parse error: syntax error, unexpected …	PHP can’t parse the file because of a syntax mistake — the real error is often on the line before the one rep…
Headers already sent	Warning: Cannot modify header information - headers already sent	You called `header()`, `setcookie()` or `session_start()` after output had already been sent to the browser.
Undefined array key	Warning: Undefined array key / Undefined index	Your code reads an array key that doesn’t exist — common with `$_GET`, `$_POST` and decoded JSON.