PHP Key value Operation detailed

This article mainly and everybody to share PHP key value operation detailed, mainly in the way of code and everyone to share, hope to help everyone.

<?php  //create the corresponding array of key values  $array = Array (0=>1, 1=>2, 2=>3, 3=>4, 6=>5);  Print_r ($array);  Update the value of the key in the array to 3  $array [3] =  Print_r ($array);  Now add a key and value  $array ["B"] = N;  Print_r ($array);  Now delete all keys and values (but keep the array original structure)  foreach ($array as $i + = $value)   {  unset ($array [$i]);  }  Print_r ($array);  Add a key  $array [] =;  Print_r ($array);  Use Array_values to re-index an array  $array = Array_values ($array);  $array [] =;  Print_r ($array);  ? >

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