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Homephp教程php手册PHP函数asort()利用值排序的具体方式解析

PHP函数asort()利用值排序的具体方式解析

Jun 13, 2016 am 11:06 AM
asortphpvaluespecificfunctionuseexisthowussortarticleWayofparseuse

我们在之前的文章中提到了如何运用ksort()函数实现按照关键字的排序方式。那么,今天我们就向大家重点介绍如何使用值对数组进行排序。在这一过程中我们将会用到Listing E的具体代码如下:

<ol class="dp-xml">
<li class="alt"><span><strong><font color="#006699"><span class="tag"></span><span class="tag-name">php</span></font></strong><span> </span></span></li>
<li class="alt"><span><span>$</span><span class="attribute"><font color="#ff0000">data</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">array</font></span><span>("US" =</span><span class="tag"><strong><font color="#006699">></font></strong></span><span> "United States", "IN" =</span><span class="tag"><strong><font color="#006699">></font></strong></span><span> <br>"India", "DE" =</span><span class="tag"><strong><font color="#006699">></font></strong></span><span> "Germany", "ES" =</span><span class="tag"><strong><font color="#006699">></font></strong></span><span> "Spain");<br>asort($data); print_r($data);  </span></span></li>
<li class="">
<span></span><span class="tag"><strong><font color="#006699">?></font></strong></span><span> </span>
</li>
</ol>

下面就是它的输出结果。请注意PHP函数asort()的结果与上面使用ksort()函数所得到的结果的不同——在这两种情况中,都是按字母顺序进行排序的,但是它们是根据数组的不同字段进行排序的。

同时,请注意关键字-值之间的联系会始终保持;它只是关键字-值对排序后的一种方式,排序并不会改变它们的对应关系。

Array ([DE] => Germany

[IN] => India

[ES] => Spain

[US] => United States

)

以上代码示例就是PHP函数asort()的具体应用,我们可以通过这个函数得到数组的值排序。


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