Example analysis of PHP array key-value usage

This article mainly introduces the PHP array key usage, the example analyzes the PHP array key value system automatic allocation principle and the use skill, has certain reference value, needs the friend to be possible to refer to under

The example in this article describes the PHP array key-value usage. Share to everyone for your reference. The specific analysis is as follows:

First look at an array:

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14-15 16

<?php $switching = Array (0 5 => 6, 3 => 7, ' A ' => 4, one,//key = 6 (the maximum value of an integer key index in the entire array is 5) ' 8 ' => 2,//Key = 8 (string Kin ' 8 ' converted to 8) ' =>,//key = ' 02 ' (note not 2) 0 => 12//Before the key with 10 is assigned 0, and the value of the 0 key is redefined to 12, overwriting the previous default 0 key value * / ); Empty array $empty = Array ();?>

If printed with Print_r ($switching) The result is:

Array ([0] => [5] => 6 [3] => 7 [A] => 4 [6] => one [8] => 2 [] => 77)

Notice that the two-digit 02 is lined up behind.

I hope this article will help you with your PHP program design.