Tag: errors
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Most referenced — #errors
Division by Zero & DivisionByZeroError 4Undefined Array Key / Offset Errors 3ReferenceError — Undefined Variables 2Null Reference Errors 2TypeError — Common Causes and Fixes 2Undefined Variable and Null Coalescing Fixes 2TypeError — When Type Declarations Throw 1Engine Exceptions — Error Hierarchy (PHP 7.0) 1
Undefined Array Key / Offset Errors 5Cannot Redeclare Function/Class Errors 2Engine Exceptions — Error Hierarchy (PHP 7.0) 2Call to Undefined Function/Method 1ArgumentCountError — Wrong Arg Count 1Parse Errors & Syntax Debugging 1Error.cause — Error Chaining 1
Undefined Array Key / Offset Errors 95Division by Zero & DivisionByZeroError 68Error Suppression Operator (@) 33TypeError — When Type Declarations Throw 27RangeError — Stack Overflow & Invalid Values 23Stack Overflow from Deep Recursion 21Engine Exceptions — Error Hierarchy (PHP 7.0) 20Class Not Found / Autoloader Failures 20
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Tag total523 pings
Terms pinged20 / 20
Distinct agents10
Engine Exceptions — Error Hierarchy (PHP 7.0) PHP 7.0+
PHP 7.0 made fatal engine errors catchable as Error subclasses — TypeError, ParseError, ArithmeticError, DivisionByZeroError — via the shared Throwable interface.
2mo ago
php intermediate
Error Logging PHP 4.0+
Recording application errors, exceptions, and diagnostic information to persistent storage — essential for diagnosing production issues where display_errors must be off and errors are invisible to users.
2mo ago
php beginner
Error Reporting & Display PHP 4.0+
PHP's error_reporting level and display_errors directive control which errors are shown and where — development needs E_ALL with display on; production needs E_ALL with display off and logging on.
2mo ago
php beginner
Error.cause — Error Chaining ES2022
ES2022 added a cause option to the Error constructor — 'new Error('message', { cause: originalError })' — enabling proper error chaining where a high-level error wraps its underlying cause, preserving the full error context across abstraction layers.
2mo ago
javascript beginner
Null Reference Errors PHP 5.0+
Errors caused by calling methods or accessing properties on null — PHP's 'Call to a member function X() on null' and JavaScript's 'Cannot read properties of null' are the most common runtime errors in both languages.
2mo ago
php beginner
ArgumentCountError — Wrong Arg Count PHP 7.1+
PHP 7.1+ throws ArgumentCountError when too few arguments are passed to a function — too many arguments are silently ignored (unless using strict_types).
2mo ago
php beginner
Call to Undefined Function/Method PHP 4.0+
'Call to undefined function' means the function wasn't declared, the file wasn't loaded, or the PHP extension providing it isn't installed.
2mo ago
php beginner
Cannot Redeclare Function/Class Errors PHP 4.0+
PHP throws a fatal error when a function or class is declared twice in the same request — use autoloading and function_exists() guards to prevent it.
2mo ago
php beginner
Class Not Found / Autoloader Failures PHP 5.3+
'Class not found' errors mean the autoloader couldn't locate the class file — usually a namespace mismatch, missing composer install, or PSR-4 misconfiguration.
2mo ago
php beginner
Division by Zero & DivisionByZeroError PHP 7.0+
PHP 7+ throws DivisionByZeroError for intdiv() and modulo with zero — but the / operator returns false or INF instead of throwing.
2mo ago
php beginner
Parse Errors & Syntax Debugging PHP 5.0+
A ParseError (E_PARSE) means PHP cannot tokenise your file — the script never runs. Common causes: missing semicolons, unclosed brackets, and typos.
2mo ago
php beginner
ReferenceError — Undefined Variables ES2015
ReferenceError is thrown when accessing a variable that hasn't been declared — unlike undefined which is a declared variable with no value.
2mo ago
javascript beginner
Stack Overflow from Deep Recursion PHP 5.0+
PHP has no configurable stack size limit — deep recursion causes a fatal segfault or memory exhaustion, not a catchable exception.
2mo ago
php intermediate
SyntaxError — Parse-Time Failures ES5
SyntaxError means JavaScript couldn't parse your code — the entire script fails to execute. Common causes: missing brackets, invalid JSON, reserved word misuse.
2mo ago
javascript beginner
TypeError — Common Causes and Fixes ES5
TypeError is thrown when a value is not of the expected type — most commonly 'Cannot read properties of undefined/null', the most frequent JavaScript runtime error.
2mo ago
javascript beginner
TypeError — When Type Declarations Throw PHP 7.0+
TypeError is thrown when a value passed to a typed parameter or return type doesn't match — strict_types=1 makes this happen at call sites too.
2mo ago
php intermediate
Undefined Array Key / Offset Errors PHP 4.0+
Accessing a non-existent array key triggers E_WARNING (PHP 7) or is silently null (PHP 8 with nullsafe) — use isset(), array_key_exists(), or ?? to guard access.
2mo ago
php beginner
Undefined Variable and Null Coalescing Fixes PHP 5.0+
Accessing an undefined variable in PHP returns null and triggers an E_WARNING — use isset(), empty(), or ?? to check safely before use.
2mo ago
php beginner
Error Suppression Operator (@) PHP 5.0+
Prefixing a PHP expression with @ silently suppresses all errors and warnings it generates — hiding bugs instead of handling them.
2mo ago
quality beginner
RangeError — Stack Overflow & Invalid Values ES5
RangeError is thrown when a value is outside its allowed range — most commonly from infinite recursion (stack overflow) or invalid array/string sizes.
javascript intermediate