如何在PHP中替换第一个HTML <strong></strong>标记

Question

我有一个用PHP编写的文本字符串：

<strong> MOST </strong> of you may have a habit of wearing socks while sleeping. 
<strong> Wear socks while sleeping to prevent cracking feet</strong>
<strong> Socks helps to relieve sweaty feet</strong>

我们可以看到，第一个强标记是

<strong> MOST </strong>

我想删除第一个强标签，并将其内部的单词转换为ucword(第一个字母大写)。结果如下所示

Most of you may have a habit of wearing socks while sleeping. 
<strong> Wear socks while sleeping to prevent cracking feet</strong>
<strong> Socks helps to relieve sweaty feet</strong>

我已经尝试了爆炸功能，但它似乎不是我想要的。以下是我的代码

<?php
$text = "<strong>MOST</strong> of you may have a habit of wearing socks while sleeping. <strong> Wear socks while sleeping to prevent cracking feet</strong>. <strong> Socks helps to relieve sweaty feet</strong>";
$context = explode('</strong>',$text);
$context = ucwords(str_replace('<strong>','',strtolower($context[0]))).$context[1];
echo $context;
?>

我的代码只有结果

Most of you may have a habit of wearing socks while sleeping. <strong> Wear socks while sleeping to prevent cracking feet

Answer 1

您可以使用explode的可选限制参数来修复代码

$context = explode("</strong>",$text,2);

但是，更好的方法是：

$context = preg_replace_callback("(<strong>(.*?)</strong>)",function($a) {return ucfirst($a[1]);},$text);

Answer 2

我知道您要求用PHP提供解决方案，但我不认为向您展示CSS解决方案会有什么坏处：

HTML

<p><strong>Most</strong> of you may have a habit of wearing socks while sleeping.</p>

CSS

p strong:first-child {
    font-weight: normal;
    text-transform: uppercase;
}

除非有特定的原因使用PHP，否则我认为它只会使本应简单的事情变得复杂。使用CSS可以减少服务器负载，并使样式保持在应有的位置。

更新： Here's a fiddle.

Answer 3

这将是有意义的：

preg_replace("<strong>(.*?)</strong>", "$1", 1)