php function array_pop() to delete the last element in the array

黄舟
Release: 2023-03-17 08:10:01
Original
2726 people have browsed it

实例

删除数组中的最后一个元素:

<?php
$a=array("red","green","blue");
array_pop($a);
print_r($a);
?>
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定义和用法

array_pop() 函数删除数组中的最后一个元素。

语法

array_pop(array)
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参数描述
array必需。规定数组。

技术细节

返回值:返回数组的最后一个值。如果数组是空的,或者不是一个数组,将返回 NULL。
PHP 版本:4+

现在我们试着使用PHP函数array_pop()从数组的尾端删除一些元素:

<?   
 
/* 首先我们建立一个数组 */   
 
$fruitArray = array("apple", "orange", "banana", "Peach", "pear");    
 
/* 使用array_pop()函数从数组的尾端删除一个元素 */   
 
$popped = array_pop($fruitArray);    
 
/* 现在我们把删除后的数组中所有元素的键(key)与值(value)都显示在网页上 */   
 
while (list($key,$value) = each($fruitArray)) {   
 
echo "$key : $value<br>";   
 
}    
 
echo "<br>最后,刚才被删除的元素的值会储存在 \$popped 变量里面,它的值是:$popped";    
 
?>
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显示结果如下: 

0 : apple

1 : orange

2 : banana

3 : Peach   

最后,由PHP函数array_pop()删除的元素的值会储存在 $popped 变量里面,它的值是: pear 。


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