Universal Grasp Universal Grasp - 1 month ago 6
PHP Question

PHP: is there difference between Index, Element, Key, Value of an Array?... are they the same thing?

When dealing with

PHP
array
s, I quite often here terms such as:

Array
Key
,

Array
Index
,

Array
Element
,

Array
Value


Can someone, PLEASE , in simple terms explain what each of these basically means?

Is there any difference?... are they all referring to the same thing?

Where do you use which? and when?

Any clarification with some simple use case examples will be highly appreciated.

i.e: in an array like:
array($a,$b,$c,$d=>$e)
What will be What?

Thanks in advance.

Answer

An array is a collection of Elements.
Every element has key & value. Key can be a integer(index) or a string.
In you case

array($a, $b, $c, $d=>$e)

can be rewritten as

array(0 => $a, 1 => $b, 2 => $c, $d => $e);  

Where 0, 1, 2, $d are the keys of the array.
You can refer 0, 1, 2 as a index for value $a,$b,$c respectively and $d is a key for $e.

.