PHP · Theory

foreach Loop

Theory

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foreach Loop is a PHP topic. In plain words you use it for pass if marks >= 40 in result.php. Don’t start with a slogan — start with that picture.

Smallest example: if / foreach ($arr as $row). Type it, run it, and say what you see. If you can do that from memory, you know foreach Loop.

From the example next to this theory — foreach Loop — pHP arrays are ordered maps.

Trap — foreach by reference then reuse the variable. Fix that before you talk about advanced PHP.

Viva — what is foreach Loop? Then show if / foreach ($arr as $row). Then name the trap.

Exam tip

What is foreach Loop? Show this: if / foreach ($arr as $row). Trap: foreach by reference then reuse the variable.

<?php
$langs = ["PHP", "JS", "SQL"];
$langs[] = "Python";
foreach ($langs as $i => $lang) {
  echo "$i: $lang\n";
}

foreach Loop — pHP arrays are ordered maps. foreach walks key and value.