PHP Delete array Element sample sharing

Source: Internet
Author: User

This article mainly introduces the PHP delete array element example, need friends can refer to the following

How to delete an array element in PHP: 1. Use the Unset () method: The code is as follows: <?php $a =array ("Red", "green", "blue", "yellow"); Count ($a); Get 4 unset ($a [1]); Deletes the second element count ($a); Get 3 echo $a [2]; There are only three elements in the array that want to get the last element, but get blue, echo $a [1];   No value?> disadvantage: After you delete an element in an array, the number of elements in the array (with count () is changed, but the array subscript is not rearranged, and you must use PHP to delete the key before the array element to manipulate the value.    2. Using the Array_splice () method: The code is as follows: <?php $a =array ("Red", "green", "blue", "yellow"); Count ($a); Get 4 Array_splice ($a, 1, 1); Deletes the second element count ($a); Get 3 echo $a [2]; Get yellow echo $a [1]; Get Blue?> This program and the previous comparison, you can see that array_splice () not only deleted the elements, but also the elements of the rearrangement, so that in the middle of the array elements will not have null value!
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