‏foreach والتحكم في الحلقات

foreach: حلقة المصفوفات

foreach مع المصفوفات المفهرسة

<?php
$fruits = ['apple', 'banana', 'cherry'];

foreach ($fruits as $fruit) {
    echo $fruit . PHP_EOL;
}
// apple
// banana
// cherry

foreach مع المفتاح => القيمة

<?php
$person = ['name' => 'Alice', 'age' => 30, 'city' => 'London'];

foreach ($person as $key => $value) {
    echo "$key: $value" . PHP_EOL;
}
// name: Alice
// age: 30
// city: London

foreach متداخلة

<?php
$users = [
    ['name' => 'Alice', 'role' => 'admin'],
    ['name' => 'Bob',   'role' => 'user'],
];

foreach ($users as $user) {
    echo $user['name'] . ' is ' . $user['role'] . PHP_EOL;
}

تعديل عناصر المصفوفة

<?php
$prices = [10, 20, 30];

foreach ($prices as &$price) {
    $price *= 1.1;  // 10% price increase
}
unset($price);  // always unset after reference loop!

print_r($prices); // [11, 22, 33]

break داخل foreach

<?php
$ids = [1, 2, 3, 4, 5];
$target = 3;

foreach ($ids as $id) {
    if ($id === $target) {
        echo 'Found: ' . $id;
        break;
    }
}

continue داخل foreach

<?php
$numbers = [1, 2, 3, 4, 5, 6];

foreach ($numbers as $n) {
    if ($n % 2 === 0) continue;  // skip evens
    echo $n . ' ';  // 1 3 5
}

list() مع foreach

<?php
$coords = [[10, 20], [30, 40], [50, 60]];

foreach ($coords as [$x, $y]) {
    echo "x=$x, y=$y" . PHP_EOL;
}
// x=10, y=20
// x=30, y=40

التكرار على الكائنات

<?php
class Config {
    public string $host = 'localhost';
    public int    $port = 3306;
    public string $db   = 'myapp';
}

foreach (new Config() as $key => $val) {
    echo "$key = $val" . PHP_EOL;
}

استخدام Generator مع foreach

<?php
function range100(): Generator {
    for ($i = 1; $i <= 100; $i++) {
        yield $i;
    }
}

foreach (range100() as $num) {
    if ($num > 5) break;
    echo $num . ' ';  // 1 2 3 4 5
}

array_walk مقابل foreach

<?php
$names = ['alice', 'bob', 'carol'];

array_walk($names, function (&$name) {
    $name = ucfirst($name);
});

print_r($names); // ['Alice', 'Bob', 'Carol']

تحقق سريع

مراجعة: foreach والتحكم في الحلقات