Array is a container with a fixed number of elements, where each element is
indexed from 0 incrementally:
<?php
$planets = ['Mercury', 'Venus', 'Earth', 'Mars', 'Jupiter', 'Saturn', 'Uranus', 'Neptune'];
// Outputs "Earth"
echo $planets[2];
Associative arrays:
<?php
$array = [
'foo' => 'bar',
'bar' => 'foo',
];
// Outputs "bar"
echo $array['foo'];
| Operator | Name | Result |
|---|---|---|
$a + $b |
Union | Union of $a and $b. |
$a == $b |
Equality | TRUE if $a and $b have the same key/value pairs. |
$a === $b |
Identity | TRUE if $a and $b have the same key/value pairs in the same order and of the same types. |
$a != $b |
Inequality | TRUE if $a is not equal to $b. |
$a <> $b |
Inequality | TRUE if $a is not equal to $b. |
$a !== $b |
Non-identity | TRUE if $a is not identical to $b. |
