PHP Array Data Type – Indexed, Associative & Multi-Dimensional Arrays – Full PHP 8 Tutorial

In PHP you can have regular index-based arrays also known as indexed arrays, you could also have arrays with custom keys also known as associative arrays & can have arrays within arrays which are called multi-dimensional arrays. You will learn all that you need to know about arrays to get started using them goes over how arrays are indexed by default & how re-indexing happens. Also, you will learn how to check if an element exists in an array at the specific key & the difference between array_key_exists & isset().

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LESSON 1.10
Course Outline – https://github.com/ggelashvili/learnphptherightway-outline
Course Playlist – https://www.youtube.com/playlist?list=PLr3d3QYzkw2xabQRUpcZ_IBk9W50M9pe-

CHAPTERS
00:00 – Intro
00:43 – What are arrays
01:27 – Indexed arrays & accessing elements
03:06 – Undefined array key
03:41 – Check if array key exists – isset()
04:04 – Mutate arrays
04:52 – Get length of array – count()
05:04 – Add elements to an array – square bracket syntax
05:37 – Add multiple elements to an array using array_push
06:05 – Name your keys (associative arrays)
07:11 – Add elements to associative arrays at specified keys
07:45 – Multi-dimensional arrays
10:02 – Duplicate keys & overwriting
11:18 – Having keys on only some elements & how automatic indexing works
12:05 – Removing an element from the end of an array using array_pop
12:27 – Removing an element from the beginning of an array using array_shift & re-indexing
13:14 – Removing element(s) from arrays by specifying keys using unset
13:59 – Using unset() does not re-index arrays
15:00 – Casting to arrays
15:27 – Another way to check if the key exists in array & the difference between array_key_exists & isset()