How Does the `=>` Operator Function in PHP's `foreach` Loop?

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Operator Assignment in PHP foreach Loop

PHP features the => operator, commonly known for its implication of being equal or greater than. However, in the context of a foreach loop, its usage deviates from this conventional meaning.

Associative Array Separator

The => operator is employed as a separator for associative arrays. Within a foreach loop, it acts to assign the array's key to a specified variable ($user in this instance) and the corresponding value to another ($pass).

Example: Associative Array Iteration

$user_list = array(
    'dave' => 'apassword',
    'steve' => 'secr3t'
);

foreach ($user_list as $user => $pass) {
    echo "{$user}'s pass is: {$pass}\n";
}

Output:

dave's pass is: apassword
steve's pass is: secr3t

Numeric Array Iteration

Remarkably, the => operator can also be employed with numerically indexed arrays.

Example: Numeric Array Iteration

$foo = array('car', 'truck', 'van', 'bike', 'rickshaw');
foreach ($foo as $i => $type) {
    echo "{$i}: {$type}\n";
}

Output:

0: car
1: truck
2: van
3: bike
4: rickshaw

Hence, within PHP's foreach loop, the => operator serves a distinct purpose as an associative array separator, enabling the traversal and access of key-value pairs.

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