Introduction to the usage of PHP function array_shift() in deleting array elements

Introduction to the usage of PHP function array_shift() in deleting array elements_PHP tutorial

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Release： 2016-07-15 13:29:11

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In previous articles, we have described to you the specific usage of the function array_pop() to delete array elements at the end of the array. Today we introduce to you the method of deleting array elements at the beginning of the array. . Here we will use Next we will show you how the PHP function array_shift() deletes elements from the beginning of the array:

<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>$</span><span class="attribute"><font color="#ff0000">fruitArray</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">array</font></span><span>("apple", "orange", "banana", "Peach", "pear");    </span>
</li>
<li class=""><span> </span></li>
<li class="alt"><span>/* 使用 array_shift()函数从数组的开头删除一个元素 */   </span></li>
<li class=""><span> </span></li>
<li class="alt">
<span>$</span><span class="attribute"><font color="#ff0000">shifted</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">array_shift</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 $shifted 变量里面，它的值是：   </span></li>
<li class=""><span> </span></li>
<li class="alt"><span>$shifted";    </span></li>
<li class=""><span> </span></li>
<li class="alt"><span>?＞   </span></li>
</ol>

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The result is as follows:

0 : orange

1 : banana

2 : Peach

3 : pear

Finally, the value of the element just deleted by the PHP function array_shift() It will be stored in the $shifted variable, and its value is: apple.