An example analysis of PHP array index and key manipulation techniques

This article describes the PHP array index and key manipulation techniques. Share to everyone for your reference. Specifically as follows:

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<?php $array = Array ("A", "B", "C"); Defines the array $array [] = "Simon"; Adds a new array element to the Print_r ($array); Output array?>

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<?php $array = Array ("A", "B", "C"); Defines the array $array [9] = "Simon"; Adds a new array element to the Print_r ($array); Output array?>

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<?php//Create a simple array $array = Array (0=>1, 1=>2, 2=>3, 3=>4, 6=>5); Print_r ($array); Now update the value of the key in the array to 2 $array [2] = 100; Print_r ($array); Now add a key $array ["X"] = 50; Print_r ($array); Delete all keys now, but keep the structure of the array itself foreach ($array as $i => $value) {unset ($array [$i]);} print_r ($array); Add another key $array [] = 25; Print_r ($array); Re-indexing using the array_values function $array = array_values ($array); $array [] = 13; Print_r ($array);?>

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