PHP Two-Dimensional Array
A two-dimensional array is an array whose elements are also arrays. See an example:
<?php
$arr = [
'boys' => ['John', 'Nick', 'Alex'],
'girls' => ['Mary', 'Helen', 'Jane'],
];
echo $arr['boys'][0];
?>
Let's output, for example, 'Nick' using our array:
<?php
$arr = [
'boys' => ['John', 'Nick', 'Alex'],
'girls' => ['Mary', 'Helen', 'Jane'],
];
echo $arr['boys'][1]; // will output 'Nick'
?>
And now let's output 'Jane':
<?php
$arr = [
'boys' => ['John', 'Nick', 'Alex'],
'girls' => ['Mary', 'Helen', 'Jane'],
];
echo $arr['girls'][2]; // will output 'Jane'
?>
