WordPress中的钩子（Hooks）是一种用于修改或扩展函数功能的机制。钩子分为两种类型：动作钩子（Action Hooks）和过滤器钩子（Filter Hooks）。
在WordPress中，document_title是一个过滤器钩子，用于修改网页标题（HTML的
标签内容）。</p>
<p>使用document_title钩子时，需要使用add_filter函数将自定义函数与钩子关联起来。以下是使用document_title钩子的基本用法：</p>
<p>1. 创建自定义函数：</p>
<p>function my_custom_title($title) {<br />
// 自定义逻辑，修改$title的值<br />
return $title;<br />
}</p>
<p>2. 将自定义函数与document_title钩子关联起来：</p>
<p>add_filter('document_title', 'my_custom_title');</p>
<p>在这个例子中，当WordPress生成网页标题时，会自动调用my_custom_title函数，并将原始的标题作为参数传递给这个函数。在自定义函数中，您可以根据需要修改标题，然后返回修改后的标题。</p>
<p>注意：如果需要修改其他参数，可以将自定义函数修改为接受多个参数的形式。例如：</p>
<p>function my_custom_title($title, $separator, $site_name) {<br />
// 自定义逻辑，修改$title的值<br />
return $title;<br />
}</p>
<p>在这种情况下，当WordPress调用my_custom_title函数时，会将标题、分隔符和站点名称作为参数传递给函数。您可以根据需要修改标题，并返回修改后的标题。</p>
<p>通过使用document_title钩子，您可以轻松地修改WordPress网页标题，以满足您的自定义需求。</p>
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