Foreach

Traversing arrays

foreach ($niz as $vrednost) and foreach ($niz as $kljuc => $vrednost) are standard for user lists, products, and associative configuration maps. Reference &$v allows modifying array elements during traversal.

Associative array

Keys can be strings (e.g. "email" => "a@b.rs") – typical form of a single database row before an object.

<?php
$korisnik = ["ime" => "Marko", "grad" => "Beograd"];
foreach ($korisnik as $polje => $v) {
    echo htmlspecialchars($polje) . ": " . htmlspecialchars($v) . "<br>";
}

Example variation

Extend the lesson example: add another variable, change the loop boundary or branching, and observe the output. Deliberately introduce an error (e.g. an undefined variable) to see the PHP message – then fix it.