分析PHP函数array_pop()的具体使用方式
我们曾经为大家介绍过如何在数组的头尾增加元素的方法。下面我们就向大家介绍如何在数组的尾端删除数组元素的具体方法。首先,我们需要用到的函数是PHP函数array_pop()。
- 函数array_pop()从数组的尾端删除一些元素:
<ol class="dp-xml"> <li class="alt"><span><span><? </span></span></li> <li class=""><span> </span></li> <li class="alt"><span>/* 首先我们建立一个数组 */ </span></li> <li class=""><span> </span></li> <li class="alt"> <span>$</span><span class="attribute"><font color="#ff0000">fruitArray</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">array</font></span><span>("apple", "orange", "banana", "Peach", "pear"); </span> </li> <li class=""><span> </span></li> <li class="alt"><span>/* 使用array_pop()函数从数组的尾端删除一个元素 */ </span></li> <li class=""><span> </span></li> <li class="alt"> <span>$</span><span class="attribute"><font color="#ff0000">popped</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">array_pop</font></span><span>($fruitArray); </span> </li> <li class=""><span> </span></li> <li class="alt"><span>/* 现在我们把删除后的数组中所有元素的键(key)与值(value)都显示在网页上 */ </span></li> <li class=""><span> </span></li> <li class="alt"><span>while (list($key,$value) = each($fruitArray)) { </span></li> <li class=""><span> </span></li> <li class="alt"><span>echo "$key : $value<br>"; </span></li> <li class=""><span> </span></li> <li class="alt"><span>} </span></li> <li class=""><span> </span></li> <li class="alt"><span>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"; </span></li> <li class=""><span> </span></li> <li class="alt"><span>?> </span></li> </ol>
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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