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PHP Numeric Arrays

PHP numeric arrays allow you to access the values in the array in numeric order through the use of numeric ID keys.

Numeric keys in PHP arrays always begin with a zero (0).

<?php
$days = array('Monday', 'Tuesday', 'Wednsday', 'Thursday', 'Friday', 'Saturday', 'Sunday');

$whatDayIsIt = $days[0];

echo "The day is $whatDayIsIt.";
?>

The code above outputs:

The day is Monday.

You can also change a value at a given index.

The first value in the code example below is changed.

<?php
$days = array('some day', 'Tuesday', 'Wednsday', 'Thursday', 'Friday', 'Saturday', 'Sunday');

$whatDayIsIt = $days[0];

echo "The day is $whatDayIsIt.";
?>

The code above outputs:

The day is some day.

You can also add a value.

<?php
$days = array('Monday', 'Tuesday', 'Wednsday', 'Thursday', 'Friday', 'Saturday', 'Sunday', 'some day');

$whatDayIsIt = $days[7];

echo "The day is $whatDayIsIt.";
?>

The code above outputs:

The day is some day.