Example of php array key value usage

This article mainly introduces the php array key value usage. The example analyzes the principle and usage skills of the system Auto-distribution of the key value in the php array, which has some reference value, for more information about how to use the php array key value, see the example in this article. Share it with you for your reference. The specific analysis is as follows:

First look at an array:

<? Php $ switching = array (10, // key = 0 5 => 6, 3 => 7, 'a' => 4, 11, // key = 6 (the maximum value of the integer key index in the entire array is 5) '8' => 2, // key = 8 (string Jian '8' is converted to 8) '02' => 77, // key = '02' (note not 2) 0 => 12/* the key with the first face value of 10 is assigned 0, the value of the 0 key is redefined as 12, which overwrites the default 0 key value */); // empty array $ empty = array ();?>

If printed using print_r ($ switching), the result is:

Array ([0] => 12 [5] => 6 [3] => 7 [a] => 4 [6] => 11 [8] => 2 [02] => 77)

Note that the two-digit 02 values are placed at the backend.

I hope this article will help you with php programming.