🐘 PHP errors

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

Code	Error	What it means
intl missing	Class "NumberFormatter" not found / The "intl" PHP extension is required	Code uses the intl extension (NumberFormatter, Collator, IntlDateFormatter) but it isn’t installed.
Composer memory	Composer: PHP Fatal error: Allowed memory size of 1610612736 bytes exhausted	Composer ran out of memory while resolving or installing dependencies.
cURL error 28	cURL error 28: Operation timed out after 30001 milliseconds with 0 bytes received	A PHP cURL (or Guzzle) request timed out before the remote server answered.
cURL error 35	cURL error 35: OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to host:443	The TLS handshake failed — protocol/cipher mismatch, a proxy interfering, or the server closed the connection.
cURL error 6	cURL error 6: Could not resolve host: api.example.com	PHP cURL couldn’t resolve the hostname via DNS.
Dynamic property deprecated	Deprecated: Creation of dynamic property Foo::$bar is deprecated	PHP 8.2+ deprecates creating properties that aren’t declared in the class.
Implicit float to int	Deprecated: Implicit conversion from float 2.5 to int loses precision	PHP 8.1+ warns when a float with a fractional part is silently converted to int (array keys, % operator, int…
Deprecated null to internal	Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated	PHP 8.1+ warns when null is passed to a built-in function that expects a string/int.
Primary script unknown	FastCGI sent in stderr: "Primary script unknown"	Nginx passed a script path to PHP-FPM that PHP-FPM couldn’t find — usually a wrong SCRIPT_FILENAME or root.
Cannot redeclare	Fatal error: Cannot redeclare function foo() (previously declared in …)	The same function (or class) was defined twice — usually a file included more than once.
Maximum function nesting	Fatal error: Maximum function nesting level of '256' reached, aborting!	Recursion went deeper than Xdebug’s max_nesting_level allows (or PHP crashed with a segfault without Xdebug).
ArgumentCountError	Fatal error: Uncaught ArgumentCountError: Too few arguments to function foo(), 1 passed and exactly 2 expected	A function was called with fewer arguments than it requires.
DivisionByZeroError	Fatal error: Uncaught DivisionByZeroError: Division by zero	Code divided by zero (or used modulo by zero) — PHP 8 throws instead of warning.
Call to member function on null	Fatal error: Uncaught Error: Call to a member function x() on null	Code called a method on a variable that is null instead of an object.
GD missing	Fatal error: Uncaught Error: Call to undefined function imagecreatefromjpeg()	The GD extension (or its JPEG/WebP support) isn’t installed for the PHP version serving the site.
Cannot use object as array	Fatal error: Uncaught Error: Cannot use object of type stdClass as array	Code used array syntax (`$x['key']`) on an object.
Uncaught Exception	Fatal error: Uncaught Exception: message in file.php:12	An exception was thrown and nothing caught it, so PHP stopped the script.
mysqli_sql_exception	Fatal error: Uncaught mysqli_sql_exception	A MySQLi query or connection failed; since PHP 8.1 MySQLi throws exceptions by default.
TypeError	Fatal error: Uncaught TypeError: foo(): Argument #1 ($x) must be of type int, string given	A function received a value of the wrong type for a typed parameter.
Unsupported operand types	Fatal error: Uncaught TypeError: Unsupported operand types: string + int	An arithmetic or array operator was used with incompatible types (PHP 8 is stricter than PHP 7).
json_decode null	json_decode() returns null / JSON_ERROR_SYNTAX: Syntax error	The string passed to json_decode isn’t valid JSON, so PHP returns null.
419 Page Expired	Laravel: 419 Page Expired (CSRF token mismatch)	Laravel rejected a POST because the CSRF token was missing, expired or didn’t match the session.
No application encryption key	Laravel: No application encryption key has been specified.	Laravel’s APP_KEY is missing, so it can’t encrypt sessions and cookies.
Laravel table not found	Laravel: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'db.sessions' doesn't exist	Laravel queried a table that hasn’t been created — usually sessions, cache, jobs or a new model’s table.
Target class does not exist	Laravel: Target class [App\Http\Controllers\X] does not exist.	Laravel’s container couldn’t find the controller or class named in a route or binding.
Laravel storage	Laravel: The stream or file "storage/logs/laravel.log" could not be opened in append mode: Failed to open stream: Permission denied	The web server can’t write to Laravel’s storage or bootstrap/cache directories.
Vite manifest not found	Laravel: Vite manifest not found at: public/build/manifest.json	Laravel’s @vite directive can’t find the compiled asset manifest because assets weren’t built.
could not find driver	PDOException: could not find driver	The PDO driver for your database (pdo_mysql, pdo_pgsql, pdo_sqlite) isn’t installed or enabled.
SQLSTATE[HY000] [2002]	PDOException: SQLSTATE[HY000] [2002] Connection refused	PHP couldn’t reach the database server at the host/port in your DSN.
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.
PHP mail	PHP mail() returns false / emails not delivered	PHP’s mail() function failed or emails never arrive (spam or rejected).
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…
OPcache stale code	PHP still runs old code after deploy (OPcache not reset)	OPcache keeps serving cached bytecode, so changes uploaded to the server don’t take effect.
UPLOAD_ERR_INI_SIZE	PHP upload error 1: The uploaded file exceeds the upload_max_filesize directive in php.ini	The uploaded file is bigger than PHP’s upload_max_filesize, so PHP discarded it.
BOM output	Unexpected characters at the top of the page / headers already sent by BOM	A UTF-8 byte-order mark (BOM) at the start of a PHP file is sent as output, breaking headers, JSON and images.
Array to string conversion	Warning: Array to string conversion	An array was used where a string is expected — echoing it, concatenating it, or passing it to a string functi…
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.
open_basedir	Warning: file_exists(): open_basedir restriction in effect. File(/x) is not within the allowed path(s)	PHP is configured to access only certain directories, and the script tried to touch a file outside them.
failed to open stream	Warning: include(x.php): Failed to open stream: No such file or directory	PHP couldn’t open a file for include/require/fopen — wrong path, missing file, or no permission.
session save path	Warning: session_start(): open(/var/lib/php/sessions/sess_x, O_RDWR) failed: Permission denied	PHP can’t write session files to the configured session.save_path.
session_start()	Warning: session_start(): Session cannot be started after headers have already been sent	session_start() ran after output was sent, so PHP can’t set the session cookie.
Array offset on null	Warning: Trying to access array offset on value of type null	Code used `$x['key']` where `$x` is null — usually a lookup or function that returned nothing.
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.
Undefined property	Warning: Undefined property: Class::$prop	Code read an object property that doesn’t exist on that object.
Undefined variable	Warning: Undefined variable $x	PHP read a variable that was never assigned in the current scope.
max_input_vars	Warning: Unknown: Input variables exceeded 1000. To increase the limit change max_input_vars in php.ini.	The form submitted more fields than PHP’s max_input_vars allows; extra fields were silently dropped.
Composer conflict	Your requirements could not be resolved to an installable set of packages.	Composer can’t find package versions that satisfy every constraint (PHP version, extensions, other packages).