array each() — PHP Technical Interview Questions & Answers

array each()

array each()

  • array each() is a PHP array helper. You pass an array, you get a new array or a boolean/count. Example: in_array(40, $marks), array_merge($a,$b), count($marks).
  • foreach is still how you loop. Functions don’t replace understanding [ ] vs ['name'=>].
  • Trap: expecting the original array to change when the function returns a copy (array_map).

Technical Interview Tip: array each(): one array, one function call, say the result.

Code Examples for array each()

array each() — working example

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

array each() — pHP arrays are ordered maps. foreach walks key and value.

How to Explain array each() to an Interviewer

What is array each()?

A PHP array helper Try it on $marks = [72,40]