PHP-Array

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<Beginner PHP><Array><Loop><Function><Pre-Def variable><Session><Read Write File><CRUD>

<Advanced PHP><PHP MySQL PHP MyAdmin><PHP MySQL Notes>

Numeric Arrays

Associate numeric index with their value.

Index starts at 0 (zero)

Index can be assigned automatically

Exemple 

Ex - Automatic assignement

$names=array("David","Amy","John");

Ex - Manual assignement

$names[0]="David";

$names[1]="Amy";

$names[2]="John";

Accessing the array element

Accessing through its indice

echo $names[1];//outputs "Amy"

Array and data types

In one array you can have many data types

 <?php

$ma[0]="David";

$ma[1]="<strong>PHP</strong>";

$ma[2]=21;

echo "$ma[0] is $ma[2] and knows$ma[1]";

?>

Associative Arrays

It uses named keys that we assign to them

can be done in two ways

$people = array("David"=>"27","Amy"=>"21"."John"=>"42");

or

$people[David]="27";

$people[Amy]="21";

$people[John]="42";

Note

"=>" is used here

Access array`s member

echo $people[`Amy`]; // outputs 21

Multi dimensional arrays

It contains one or more arrays dimension of array = number of indice needed

Two dimensional array

$people=array(

`online`=>array(`David`,`Amy`),

`offline`=>array(`John`,`Rob`,`Jack`),

`away`=>array(`Arthur`,`Daniel`)

);

echo $people[`online`][0]; // outputs `David`

echo $people[`away`][1]; // outputs `Daniel`