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/learnp...
Course Playlist - • Learn PHP The Right Way - Full PHP Tutoria...
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()
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