php - 在 php 中使用自定义标签显示图像或视频

Question

我在表单中添加了按钮，就像我的简单内容管理系统一样。我写文章等，所以我也想添加图片和视频。我想使用自定义标签添加它们

    function formatText (el,tagstart,tagend) { 

    if (el.setSelectionRange) {
    el.value = el.value.substring(0,el.selectionStart) + tagstart + el.value.substring(el.selectionStart,el.selectionEnd) + tagend + el.value.substring(el.selectionEnd,el.value.length)
    }
    else {
    var selectedText = document.selection.createRange().text;

    if (selectedText != "") { 
        var newText = tagstart + selectedText + tagend; 
        document.selection.createRange().text = newText; 
    } 

    }



} 


<form name="my_form"> 
<textarea name="my_textarea" id="mytext"></textarea><br /> 
<input type="button" value="IMAGE" onclick="formatText (document.getElementById('mytext'),'[IMAGE]','[/IMAGE]');" /> 

这是将 [IMAGE] [/IMAGE] 标签添加到我的文本区域中，我想在提交表单后显示此标签之间的图像链接。同样，我想添加 [VIDEO] [/VIDEO] 标签，如果我在这些标签之间写入 YouTube 链接，则在显示页面时显示视频。

我怎样才能做到这一点？

Answer 1

这段代码应该可以工作。请参阅评论以获取更多说明。

//The data for this variable would be read from a database, user input, etc.
$content = "Non augue, ultrices[VIDEO]www.youtube.com/?vvddee[/VIDEO] ut elementum natoque tempor placerat. Egestas, penatibus urna, dis risus habitasse. Rhoncus augue urna porta, enim cum risus eu tortor in, p[IMAGE]images/abcde.png[/IMAGE]lacerat rhoncus mus tortor? Nec, magnis, enim elementum non urna eros augue, ridiculus porta dapibus? Parturient, dictumst nunc vel turpis! Eu eros vel tempor cum in.";

//Replace custom video tag with youtube embed
preg_match_all('/\[VIDEO\](https?:\/\/)?(www.)?youtube.com(\/watch\?v=|\/?\?)?(\w*)\[\/VIDEO\]/im', $content, $matches, PREG_SET_ORDER);
foreach($matches as $match){
    $content = str_replace($match[0],'<iframe width="420" height="315" src="http://www.youtube.com/embed/'.$match[4].'" frameborder="0" allowfullscreen></iframe>',$content);
}

//Replace custom image tag with html image tag
preg_match_all('/\[IMAGE\](.*)\[\/IMAGE\]/im', $content, $matches, PREG_SET_ORDER);
foreach($matches as $match){
    $content = str_replace($match[0],'<img src="'.$match[1].'"></image>',$content);
}
echo $content;

希望这有帮助。