PHP uses unset() to delete a certain unit (key) in an array, unset array_PHP tutorial

php uses unset() to delete a certain unit (key) in the array, unset array

The example in this article describes how PHP uses unset() to delete a certain unit (key) in an array. Share it with everyone for your reference. The specific analysis is as follows:

unset can delete either a variable or a unit in an array. But be aware that the array will not be reindexed.

Examples are as follows:

<&#63;php
$arr = array("朝阳区","海淀区","西城区","东城区","丰台区");
unset($arr[3]);
echo "<pre class="brush:php;toolbar:false">";
print_r($arr);
&#63;>

The output results are as follows:

Array
(
  [0] => 朝阳区
  [1] => 海淀区
  [2] => 西城区
  [4] => 丰台区
)

I hope this article will be helpful to everyone’s PHP programming design.

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