Php terms
The engine behind the web's most-used server-side language
PHP powers an enormous portion of the web — from WordPress and Laravel to custom e-commerce platforms. This category covers the language internals, core functions, OOP features, type system, performance patterns, and PHP-specific quirks that every serious PHP developer should understand deeply. Whether you are writing procedural scripts or building full-stack applications with modern PHP 8.x features, these terms form the foundation.
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Most referenced — PHP
ereg() / eregi() — POSIX Regex Removed in PHP 7 2Namespaces Introduced in PHP 5.3 1Division by Zero & DivisionByZeroError 1Exception Handling Introduced (PHP 5) 1Undefined Array Key / Offset Errors 1Null Coalescing ?? Operator (PHP 7.0) 1Safe Mode — What It Was & Why It Failed 1Exception Handling (try/catch/finally) 1
Division by Zero & DivisionByZeroError 10Undefined Array Key / Offset Errors 8PHP Execution Model — Shared-Nothing Architecture 6PDOStatement::bindParam() vs bindValue() 5ereg() / eregi() — POSIX Regex Removed in PHP 7 3PHP End-of-Life Schedule & Security Implications 2Composer & Dependency Management 2session_regenerate_id() 2
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Distinct agents12
HTTP Cookies in PHP PHP 7.3+
Cookies are small key-value pairs sent by the server via Set-Cookie and echoed back by the browser on every request — PHP sets them with setcookie() before any output, with Secure, HttpOnly, and SameSite flags controlling safety.
1mo ago
php beginner
MySQL charset=utf8mb4 PHP 5.1+
The correct MySQL character set for full Unicode support — including emoji and supplementary characters that the older utf8 charset cannot store.
2mo ago
php beginner
MySQL Connection Pooling PHP 5.1+
Reusing database connections across requests instead of opening and closing a new connection on every request.
2mo ago
php intermediate
MySQL DSN (Data Source Name) PHP 5.1+
The connection string passed to PDO specifying the database driver, host, port, database name, and charset.
2mo ago
php beginner
PDO Error Handling PHP 5.1+
PDO has three error modes — silent, warning, and exception — controlling how database errors surface.
2mo ago
php beginner
PDO Fetch Modes PHP 5.1+
Constants controlling how PDO returns rows — as arrays, objects, or custom classes.
2mo ago
php beginner
PDO lastInsertId() PHP 5.1+
Returns the auto-increment ID generated by the most recent INSERT statement.
2mo ago
php beginner
PDO Named Placeholders PHP 5.1+
Named parameters (:name) in prepared statements — more readable than positional ? placeholders for queries with multiple parameters.
2mo ago
php beginner
PDO query() vs prepare() PHP 5.1+
PDO query() executes raw SQL immediately — prepare() parameterises it. query() must never include user-controlled values.
CWE-89 OWASP A3:2021
2mo ago
php beginner
9.8
PDO Transactions PHP 5.1+ PDO wraps multiple queries in an atomic unit — either all succeed or all roll back.
2mo ago
php intermediate
PDO::ATTR_EMULATE_PREPARES PHP 5.1+
Controls whether PDO sends real prepared statements to the database or emulates them client-side in PHP.
CWE-89 OWASP A3:2021
2mo ago
php intermediate
PDOStatement::bindParam() vs bindValue() PHP 5.1+
Two PDO methods for binding variables to placeholders — bindParam() binds by reference (evaluated at execute), bindValue() binds by value (evaluated immediately).
2mo ago
php intermediate
PDOStatement::rowCount() PHP 5.1+
Returns the number of rows affected by the last DELETE, INSERT, or UPDATE — unreliable for SELECT.
2mo ago
php beginner
PHP Generators PHP 5.5+
Functions using yield that produce values lazily — one at a time — instead of building a complete array in memory.
2mo ago
php intermediate
PHP Fibers — Internals & Scheduler Patterns PHP 8.1+ How PHP Fibers work under the hood — stack allocation, suspension mechanics, and how to build a cooperative multitasking scheduler on top of the Fiber API introduced in PHP 8.1.
2mo ago
php advanced
#[Override] Attribute (PHP 8.3) PHP 8.3+
The #[Override] attribute tells PHP (and static analysers) that a method is intentionally overriding a parent class or interface method — if no such method exists in a parent, PHP throws an error at class load time.
2mo ago
php intermediate
Abstract readonly Properties PHP 8.4+
PHP 8.4 allows abstract readonly properties in abstract classes and interfaces — defining that implementations must provide a readonly property of a specific type.
2mo ago
php advanced
Anonymous Functions / Closures (PHP 5.3) PHP 5.3+
PHP 5.3 introduced anonymous functions (closures) — function() {} expressions assignable to variables, passable as callbacks, and able to capture outer scope with use().
2mo ago
php intermediate
array_column() — Plucking Values from Arrays PHP 5.5+
array_column() extracts a single column from a multi-dimensional array or array of objects — the idiomatic PHP replacement for foreach loops that build lookup arrays, and for creating ID-indexed maps.
2mo ago
php beginner
array_find() / array_find_key() (PHP 8.4) PHP 8.4+
PHP 8.4 adds array_find() and array_find_key() — built-in functions that return the first element (or key) matching a callback predicate, replacing verbose foreach loops or array_filter() + reset() patterns.
2mo ago
php beginner