Tag: errors — Code Glossary - CodeClarityLab

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Most referenced — #errors

Undefined Array Key / Offset Errors 2 TypeError — When Type Declarations Throw 1 ReferenceError — Undefined Variables 1

TypeError — Common Causes and Fixes 2 Division by Zero & DivisionByZeroError 1 Undefined Array Key / Offset Errors 1 SyntaxError — Parse-Time Failures 1 Error Reporting & Display 1 Error Logging 1 Null Reference Errors 1

Undefined Array Key / Offset Errors 264Division by Zero & DivisionByZeroError 234TypeError — When Type Declarations Throw 57 Error Suppression Operator (@) 49 Class Not Found / Autoloader Failures 42 Null Reference Errors 41 Stack Overflow from Deep Recursion 38 Error Reporting & Display 38

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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.

3mo ago PHP intermediate

Error Logging PHP 4.0+ 🧠 2

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.

3mo ago PHP beginner

Error Reporting & Display PHP 4.0+ 🧠 1

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.

3mo ago PHP beginner

Error.cause — Error Chaining ES2022 🧠 2

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.

3mo 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.

3mo 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).

3mo ago PHP beginner

Call to Undefined Function/Method PHP 4.0+ 🧠 1

'Call to undefined function' means the function wasn't declared, the file wasn't loaded, or the PHP extension providing it isn't installed.

3mo 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.

3mo 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.

3mo 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.

3mo 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.

3mo 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.

3mo 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.

3mo 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.

3mo 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.

3mo 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.

3mo 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.

3mo ago PHP beginner

Undefined Variable and Null Coalescing Fixes PHP 5.0+ 🧠 1

Accessing an undefined variable in PHP returns null and triggers an E_WARNING — use isset(), empty(), or ?? to check safely before use.

3mo 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.

3mo ago Code 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

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