Tag: php7
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each() & list() — Deprecated Iteration PHP 3.0+
each() was deprecated in PHP 7.2 and removed in PHP 8 — replace while(list($k,$v)=each($arr)) with foreach. list() itself is still valid as [] destructuring.
2mo ago
php beginner
Engine Exceptions — Error Hierarchy (PHP 7.0) PHP 7.0+
PHP 7.0 made fatal engine errors catchable as Error subclasses — TypeError, ParseError, ArithmeticError, DivisionByZeroError — via the shared Throwable interface.
2mo ago
php intermediate
ereg() / eregi() — POSIX Regex Removed in PHP 7 PHP 3.0+
ereg() and eregi() were POSIX regex functions removed in PHP 7.0 — replace with preg_match() (PCRE) which is faster, more powerful, and the standard since PHP 4.
2mo ago
php beginner
mcrypt Deprecation — Migrate to OpenSSL PHP 5.0+
mcrypt was deprecated in PHP 7.1 and removed in PHP 7.2 — migrate all encryption to OpenSSL (openssl_encrypt) or libsodium (sodium_crypto_secretbox).
2mo ago
php intermediate
Migrating from PHP 7 to PHP 8 PHP 7.0+
PHP 7→8 migration: fix type coercion changes (stricter), remove deprecated functions (each(), create_function()), update match/constructor promotion, check third-party compatibility.
2mo ago
php intermediate
Null Coalescing ?? Operator (PHP 7.0) PHP 7.0+
PHP 7.0's ?? operator returns the left side if it exists and isn't null, otherwise the right — replacing isset($x) ? $x : $default with $x ?? $default.
2mo ago
php beginner
Return Type Declarations (PHP 7.0) PHP 7.0+
PHP 7.0 return type declarations (:int, :string, :void, :static, :never) enable functions to declare what they return — making return contract violations detectable at runtime and by static analysis.
2mo ago
php beginner
Scalar Type Declarations (PHP 7.0) PHP 7.0+
PHP 7.0 added int, float, string, bool type declarations for function parameters — the biggest type safety leap in PHP history, enabling static analysis.
2mo ago
php beginner
Typed Properties (PHP 7.4) PHP 7.4+
PHP 7.4 typed properties add type declarations to class properties — public string $name — preventing type mismatches and enabling full static analysis of object state.
2mo ago
php intermediate
Migrating from PHP 5.x to PHP 7 and 8 PHP 5.0+
PHP 7 removed mysql_*, ereg functions, and several deprecated features — a systematic approach using Rector and PHPCompatibility catches 95% of issues automatically.
2mo ago
php intermediate
PHP 7 Performance — 2x Faster Than PHP 5.6 PHP 7.0+
PHP 7.0 (2015) delivered roughly double the throughput of PHP 5.6 through a complete rewrite of Zend Engine internals — without requiring any code changes for most applications.
2mo ago
php intermediate
Spaceship Operator <=> (PHP 7.0) PHP 7.0+
The spaceship operator <=> returns -1, 0, or 1 by comparing two values — it replaces verbose if/else comparison callbacks in usort() with a single concise expression.
2mo ago
php beginner
Null Coalescing Operator Not Used PHP 7.0+
Using isset() + ternary or if/else chains when the null coalescing operator (??) or null coalescing assignment (??=) would be cleaner and more idiomatic.
2mo ago
style beginner
Anonymous Classes (PHP 7.0) PHP 7.0+
Classes without a name, defined inline with new class — useful for one-off implementations and test doubles.
2mo ago
php intermediate
Array Destructuring ([] = …) PHP 7.1+
PHP's short list() syntax — [$a, $b] = $arr — assigns array elements to variables in a single expressive statement.
2mo ago
php intermediate
declare(strict_types=1) PHP 7.0+
Enables strict scalar type checking for function arguments and return values in a PHP file, preventing silent type coercion.
2mo ago
php intermediate
Null Coalescing Operator (??) PHP 7.0+
Returns the left operand if it exists and is not null, otherwise the right — cleaner than isset() ternary chains.
2mo ago
php beginner
Nullable Types (?Type) PHP 7.1+
Declaring a type as ?Type allows either a value of that type or null — shorthand for Type|null.
2mo ago
php beginner
Type Declarations Overview PHP 7.0+
PHP's full type system: scalar types, return types, union types, intersection types, nullable, never, and mixed — all enforced at runtime.
2mo ago
php intermediate