Php 正则表达式替换HTML字符串？

这是我的字符串：

<ol>
    <li>
        <a rel="nofollow" href="http://127.0.0.1/index.php/something?price=3%2C25"><span class="price">50,00€</span> - <span class="price">75,00€</span></a> (38)
    </li>
    <li>
        <a rel="nofollow" href="http://127.0.0.1/index.php/something?price=4%2C25"><span class="price">75,00€</span> - <span class="price">100,00€</span></a> (11)
    </li>
</ol>

(38)


(11)

我想换一个

<span class="price">50,00€</span> - <span class="price">75,00€</span>

<代码>50,00欧元-75,00欧元 用“foobar”和

75,00欧元-100,00欧元

以“foobar2”为例。知道用什么替换哪一行的唯一方法是URL中的price=3或price=4部分

因此，替换后，字符串应如下所示：

<ol>
    <li>
        <a rel="nofollow" href="http://127.0.0.1/index.php/something?price=3%2C25">foobar</a> (38)
    </li>
    <li>
        <a rel="nofollow" href="http://127.0.0.1/index.php/something?price=4%2C25">foobar2</a> (11)
    </li>
</ol>

(38)


(11)

我试过preg_replace，但它总是有太多的字符串。想法

---

谢谢你的帮助

如果您希望根据某种键更改内容，我建议使用数组保存值

<?php

$foo_array = array(3 => 'foobar', 4 => 'foobar2');

---

简单：不要在html上使用正则表达式。这是一个简单的操作，它是PHP标准吗？它在PHP网站上，不是吗？用克利夫兰家族的话来说：

No，No，noooooo可能重复的
<?php

$foo_array = array(3 => 'foobar', 4 => 'foobar2');

$string = '<ol>
    <li>
        <a rel="nofollow" href="http://127.0.0.1/index.php/something?price=3%2C25"><span class="price">50,00€</span> - <span class="price">75,00€</span></a> (38)
    </li>
    <li>
        <a rel="nofollow" href="http://127.0.0.1/index.php/something?price=4%2C25"><span class="price">75,00€</span> - <span class="price">100,00€</span></a> (11)
    </li>
</ol>';

$new_string = preg_replace_callback('/(price=(3|4)([A-Z0-9%]+)">)(.*?)(<\/a>)/ms', function ($m) use ($foo_array) {return "$m[1]".$foo_array[$m[2]]."$m[5]";}, $string);

print $new_string;

$dom_document = new DOMDocument(); // CREATE A NEW DOCUMENT
$dom_document->loadHTML($string); // LOAD THE STRING INTO THE DOCUMENT
$links = $dom_document->getElementsByTagName('a'); // PULL OUT THE LINKS OUT OF THE DOCUMENT

// LOOP THROUGH EACH LINK
foreach ($links AS $link) {

    // IF WE FIND A 3 OR A 4 AFTER price=, THEN, REPLACE THE TEXT OF 
    // - THE LINK (THE nodeValue) WITH THE ITEM FROM THE ARRAY
    if (preg_match('/price=(3|4)/ms', $link->getAttribute('href'), $m)) {
        $link->nodeValue = $foo_array[$m[1]];
    }

}

$new_string_2 = $dom_document->saveHTML(); // WRITE THE CHANGES TO A STRING

print $new_string_2;