Multidimensional Array — PHP Technical Interview Questions & Answers

Multidimensional Array

Multidimensional Array

  • Multidimensional Array is a PHP topic. In plain words you use it for $student['roll'] in a class list. Don’t start with a slogan — start with that picture.
  • Smallest example: ['name'=>'Asha','roll'=>12]. Type it, run it, and say what you see. If you can do that from memory, you know Multidimensional Array.
  • From the example next to this theory: Multidimensional Array — pHP arrays are ordered maps.
  • Trap: mixing 0-based and named keys blindly. Fix that before you talk about advanced PHP.
  • Viva: what is Multidimensional Array? Then show ['name'=>'Asha','roll'=>12]. Then name the trap.

Technical Interview Tip: What is Multidimensional Array? Show this: ['name'=>'Asha','roll'=>12]. Trap: mixing 0-based and named keys blindly.

Code Examples for Multidimensional Array

Multidimensional Array — working example

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

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

How to Explain Multidimensional Array to an Interviewer

What is Multidimensional Array?

Used for $student['roll'] a class list Not just the heading

Give one small example of Multidimensional Array.

['name'=>'Asha','roll'=>12] Multidimensional Array — pHP arrays are ordered maps

What mistake do beginners make with Multidimensional Array?

mixing 0-based and named keys blindly Show the fix

Where do you use Multidimensional Array?

a class list $student['roll']