与JS的encodeURIComponent相对应的PHP函数

在用AJAX与后台交互时经常要对中文进行编码解码，对于JS来说有两个函数：encodeURIComponent用于编码，decodeURIComponent用于解码。而对于后台的PHP来说有两个相对应的编码解码函数：urlencode用于编码，urldecode用于解码。现在看下列两段代码，先给个PHP代码：

<span class="preprocessor">&lt;?php</span> <span class="variable">$myStr1</span> = <span class="string">'我是中国人'</span>; <span class="variable">$myStr2</span> = urlencode(<span class="variable">$myStr1</span>); <span class="keyword">echo</span> <span class="variable">$myStr1</span> . <span class="string">'&lt;br /&gt;'</span>; <span class="keyword">echo</span> <span class="variable">$myStr2</span> . <span class="string">'&lt;br /&gt;'</span>; <span class="keyword">echo</span> urldecode(<span class="variable">$myStr2</span>) . <span class="string">'&lt;br /&gt;'</span>; <span class="preprocessor">?&gt;</span>

<?php $myStr1 = '我是中国人'; $myStr2 = urlencode($myStr1); echo $myStr1 . ' '; echo $myStr2 . ' '; echo urldecode($myStr2) . ' '; ?>

上面这段php代码会输出:

我是中国人 <span class="variable">%E6</span><span class="variable">%88</span><span class="variable">%91</span><span class="variable">%E6</span><span class="variable">%98</span><span class="variable">%AF</span><span class="variable">%E4</span><span class="variable">%B8</span><span class="variable">%AD</span><span class="variable">%E5</span><span class="variable">%9B</span><span class="variable">%BD</span><span class="variable">%E4</span><span class="variable">%BA</span><span class="variable">%BA</span> 我是中国人

我是中国人 %E6%88%91%E6%98%AF%E4%B8%AD%E5%9B%BD%E4%BA%BA 我是中国人

再来看JS代码：

<span class="keyword">var</span> myStr1 = <span class="string">'我是中国人'</span>; <span class="keyword">var</span> myStr2 = encodeURIComponent(myStr1);
document.write(myStr1);
document.write(<span class="string">'&lt;br /&gt;'</span>);
document.write(myStr2);
document.write(<span class="string">'&lt;br /&gt;'</span>);
document.write(decodeURIComponent(myStr2));

var myStr1 = '我是中国人'; var myStr2 = encodeURIComponent(myStr1);

document.write(myStr1);

document.write(' ');

document.write(myStr2);

document.write(' ');

document.write(decodeURIComponent(myStr2));

上面这段JS代码会输出:

我是中国人 <span class="variable">%E6</span><span class="variable">%88</span><span class="variable">%91</span><span class="variable">%E6</span><span class="variable">%98</span><span class="variable">%AF</span><span class="variable">%E4</span><span class="variable">%B8</span><span class="variable">%AD</span><span class="variable">%E5</span><span class="variable">%9B</span><span class="variable">%BD</span><span class="variable">%E4</span><span class="variable">%BA</span><span class="variable">%BA</span> 我是中国人