在 PHP 中检测 HTML 中是否存在特定标签的实现

1、将一篇文稿发布至微信的时候，微信响应失败：错误代码：45166，错误信息：invalid content hint: [pzRHda0286d228] rid: 61041ffe-5cefd269-6c9611ff。

2、最终分析得出，文稿内容中包含标签：mpvoice 所导致。文稿内容如下：

内容contentcontentcontentcontentcontentcontentcontentcontentcontentcontentcontentcontent<mpvoice class=/"js_editor_audio audio_iframe js_uneditable/" src=/"/cgi-bin/readtemplate?t=tmpl/audio_tmpl&amp;name=%E4%B8%80%E4%B8%AA%E4%BA%BA%EF%BC%8C%E4%B9%9F%E6%8C%BA%E5%A5%BD&amp;play_length=05:22/" isaac2=/"1/" low_size=/"612.81/" source_size=/"612.8/" high_size=/"2524.76/" name=/"一个人，也挺好/" play_length=/"322000/" voice_encode_fileid=/"MzI1NjA0MDg2M18yNjUwNzYzNTcz/" data-topic_id=/"1693506805106065417/" data-topic_name=/"夜听精选/" data-pluginname=/"insertaudio/" style=/"margin-top: 50px; margin-right: 0px; margin-bottom: 0px; max-width: 100%;/"></mpvoice>

3、最终决定在调用微信接口之前，先检测 HTML 中是否存在标签：mpvoice，如果存在，则不在走后续的流程，以节省用户等待时间

4、最终实现代码如下：

$mpvoicePattern = "/<mpvoice([^>]+)>(?:(?!<//mpvoice>)[/s/S])*<//mpvoice>/s";
$audioPattern = "/<audio([^>]+)>(?:(?!<//audio>)[/s/S])*<//audio>/s";
preg_match($mpvoicePattern, $item['content'], $mpvoiceMatches);
preg_match($audioPattern, $item['content'], $audioMatches);
if (!empty($mpvoiceMatches)) {
    $this->addError($attribute, Yii::t('error', Yii::t('error', Yii::t('error', '202247'), ['tag' => 'mpvoice'])));
    break;
}
if (!empty($audioMatches)) {
    $this->addError($attribute, Yii::t('error', Yii::t('error', Yii::t('error', '202247'), ['tag' => 'audio'])));
    break;
}

5、分别打印 $mpvoiceMatches、$audioMatches 结果如下

内容contentcontentcontentcontentcontentcontentcontentcontentcontentcontentcontentcontent<mpvoice class=/"js_editor_audio audio_iframe js_uneditable/" src=/"/cgi-bin/readtemplate?t=tmpl/audio_tmpl&amp;name=%E4%B8%80%E4%B8%AA%E4%BA%BA%EF%BC%8C%E4%B9%9F%E6%8C%BA%E5%A5%BD&amp;play_length=05:22/" isaac2=/"1/" low_size=/"612.81/" source_size=/"612.8/" high_size=/"2524.76/" name=/"一个人，也挺好/" play_length=/"322000/" voice_encode_fileid=/"MzI1NjA0MDg2M18yNjUwNzYzNTcz/" data-topic_id=/"1693506805106065417/" data-topic_name=/"夜听精选/" data-pluginname=/"insertaudio/" style=/"margin-top: 50px; margin-right: 0px; margin-bottom: 0px; max-width: 100%;/"></mpvoice><img class=/"rich_pages __bg_gif/" data-galleryid=/"/" data-ratio=/"0.304552590266876/" data-src=/"https://image.dev.chinamcloud.cn/cms/sjrmt/upload/HttpImage/mrtpsc/2021/08/06/39d0ca9927ed480da0068e1b6cee87cd.gif/" data-type=/"image/" data-w=/"637/" _width=/"637px/" src=/"https://image.dev.chinamcloud.cn/cms/sjrmt/upload/HttpImage/mrtpsc/2021/08/06/39d0ca9927ed480da0068e1b6cee87cd.gif/" data-order=/"0/" alt=/"/" data-fail=/"0/" style=/"width: 100%; visibility: visible !important;/" title=/"/"><figure><figcaption>Listen to the T-Rex:</figcaption><audio controls src=/"/media/cc0-audio/t-rex-roar.mp3/">Your browser does not support the<code>audio</code> element.</audio></figure>

Array
(
    [0] => <mpvoice class="js_editor_audio audio_iframe js_uneditable" src="/cgi-bin/readtemplate?t=tmpl/audio_tmpl&amp;name=%E4%B8%80%E4%B8%AA%E4%BA%BA%EF%BC%8C%E4%B9%9F%E6%8C%BA%E5%A5%BD&amp;play_length=05:22" isaac2="1" low_size="612.81" source_size="612.8" high_size="2524.76" name="一个人，也挺好" play_length="322000" voice_encode_fileid="MzI1NjA0MDg2M18yNjUwNzYzNTcz" data-topic_id="1693506805106065417" data-topic_name="夜听精选" data-pluginname="insertaudio" style="margin-top: 50px; margin-right: 0px; margin-bottom: 0px; max-width: 100%;"></mpvoice>
    [1] =>  class="js_editor_audio audio_iframe js_uneditable" src="/cgi-bin/readtemplate?t=tmpl/audio_tmpl&amp;name=%E4%B8%80%E4%B8%AA%E4%BA%BA%EF%BC%8C%E4%B9%9F%E6%8C%BA%E5%A5%BD&amp;play_length=05:22" isaac2="1" low_size="612.81" source_size="612.8" high_size="2524.76" name="一个人，也挺好" play_length="322000" voice_encode_fileid="MzI1NjA0MDg2M18yNjUwNzYzNTcz" data-topic_id="1693506805106065417" data-topic_name="夜听精选" data-pluginname="insertaudio" style="margin-top: 50px; margin-right: 0px; margin-bottom: 0px; max-width: 100%;"
)
Array
(
    [0] => <audio controls src="/media/cc0-audio/t-rex-roar.mp3">Your browser does not support the<code>audio</code> element.</audio>
    [1] =>  controls src="/media/cc0-audio/t-rex-roar.mp3"
)

6、当仅在内容中包含 <mpvoice、/mpvoice>、audio 等文本内容时，而不是封闭且完整的 HTML 标签，则不会触发正则的匹配。如图1

图1

内容contentcontentcontentcontentcontentcontentcontentcontentcontentcontentcontentcontent<mpvoice class=/"js_editor_audio audio_iframe js_uneditable/" src=/"/cgi-bin/readtemplate?t=tmpl/audio_tmpl&amp;name=%E4%B8%80%E4%B8%AA%E4%BA%BA%EF%BC%8C%E4%B9%9F%E6%8C%BA%E5%A5%BD&amp;play_length=05:22/" isaac2=/"1/" low_size=/"612.81/" source_size=/"612.8/" high_size=/"2524.76/" name=/"一个人，也挺好/" play_length=/"322000/" voice_encode_fileid=/"MzI1NjA0MDg2M18yNjUwNzYzNTcz/" data-topic_id=/"1693506805106065417/" data-topic_name=/"夜听精选/" data-pluginname=/"insertaudio/" style=/"margin-top: 50px; margin-right: 0px; margin-bottom: 0px; max-width: 100%;/">/mpvoice><img class=/"rich_pages __bg_gif/" data-galleryid=/"/" data-ratio=/"0.304552590266876/" data-src=/"https://image.dev.chinamcloud.cn/cms/sjrmt/upload/HttpImage/mrtpsc/2021/08/06/39d0ca9927ed480da0068e1b6cee87cd.gif/" data-type=/"image/" data-w=/"637/" _width=/"637px/" src=/"https://image.dev.chinamcloud.cn/cms/sjrmt/upload/HttpImage/mrtpsc/2021/08/06/39d0ca9927ed480da0068e1b6cee87cd.gif/" data-order=/"0/" alt=/"/" data-fail=/"0/" style=/"width: 100%; visibility: visible !important;/" title=/"/"><figure><figcaption>Listen to the T-Rex:</figcaption>audio controls src=/"/media/cc0-audio/t-rex-roar.mp3/">Your browser does not support the<code>audio</code> element.</audio></figure>

Array
(
    [0] => <mpvoice class="js_editor_audio audio_iframe js_uneditable" src="/cgi-bin/readtemplate?t=tmpl/audio_tmpl&amp;name=%E4%B8%80%E4%B8%AA%E4%BA%BA%EF%BC%8C%E4%B9%9F%E6%8C%BA%E5%A5%BD&amp;play_length=05:22" isaac2="1" low_size="612.81" source_size="612.8" high_size="2524.76" name="一个人，也挺好" play_length="322000" voice_encode_fileid="MzI1NjA0MDg2M18yNjUwNzYzNTcz" data-topic_id="1693506805106065417" data-topic_name="夜听精选" data-pluginname="insertaudio" style="margin-top: 50px; margin-right: 0px; margin-bottom: 0px; max-width: 100%;"></mpvoice>
    [1] =>  class="js_editor_audio audio_iframe js_uneditable" src="/cgi-bin/readtemplate?t=tmpl/audio_tmpl&amp;name=%E4%B8%80%E4%B8%AA%E4%BA%BA%EF%BC%8C%E4%B9%9F%E6%8C%BA%E5%A5%BD&amp;play_length=05:22" isaac2="1" low_size="612.81" source_size="612.8" high_size="2524.76" name="一个人，也挺好" play_length="322000" voice_encode_fileid="MzI1NjA0MDg2M18yNjUwNzYzNTcz" data-topic_id="1693506805106065417" data-topic_name="夜听精选" data-pluginname="insertaudio" style="margin-top: 50px; margin-right: 0px; margin-bottom: 0px; max-width: 100%;"
)
Array
(
    [0] => <audio controls src="/media/cc0-audio/t-rex-roar.mp3">Your browser does not support the<code>audio</code> element.</audio>
    [1] =>  controls src="/media/cc0-audio/t-rex-roar.mp3"
)