php - 过滤 src attribute</a></h1> <div class="ml12 aside-cta flex--item print:d-none sm:ml0 sm:mb12 sm:order-first sm:as-end"> <a href="https://stackoverflow.com/questions/ask" target="_blank" class="ws-nowrap s-btn s-btnprimary">问问题</a></div> </div> <div class="d-flex fw-wrap pb8 mb16 bb bc-black-075"> <div class="flex--item ws-nowrap mr16 mb8"> <span class="fc-light mr2"></span> </div> <div class="flex--item ws-nowrap mr16 mb8" title="2022-04-17 15:46:40Z"> <span class="fc-light mr2">问问题</span> <time itemprop="dateCreated" datetime="2013-04-25T09:26:44.963">2013-04-25T09:26:44.963</time> </div> <div class="flex--item ws-nowrap mb8" title="Viewed 6 times"> <span class="fc-light mr2"></span> 170 次 </div> </div> <div id="mainbar" role="main" aria-label="question and answers"> <div class="question" data-questionid="4" data-position-on-page="0" data-score="763" id="question"> <div class="post-layout"> <div class="votecell post-layout--left"> <div class="js-voting-container d-flex jc-center fd-column ai-stretch gs4 fc-black-200" data-post-id="4"> <button class="js-vote-up-btn flex--item s-btn s-btnunset c-pointer " data-controller="s-tooltip" data-s-tooltip-placement="right" aria-pressed="false" aria-label="Up vote" data-selected-classes="fc-theme-primary" data-unselected-classes="" aria-describedby="--stacks-s-tooltip-peeufs8c"> <svg aria-hidden="true" class="svg-icon iconArrowUpLg" width="36" height="36" viewBox="0 0 36 36"><path d="M2 25h32L18 9 2 25Z"></path></svg> </button> <div id="--stacks-s-tooltip-peeufs8c" class="s-popover s-popovertooltip pe-none" aria-hidden="true" role="tooltip">This question shows research effort; it is useful and clear<div class="s-popover--arrow"></div></div> <div class="js-vote-count flex--item d-flex fd-column ai-center fc-black-500 fs-title" itemprop="upvoteCount" data-value=""> 0 </div> <button class="js-vote-down-btn flex--item s-btn s-btnunset c-pointer " data-controller="s-tooltip" data-s-tooltip-placement="right" aria-pressed="false" aria-label="Down vote" data-selected-classes="fc-theme-primary" data-unselected-classes="" aria-describedby="--stacks-s-tooltip-04106eqn"> <svg aria-hidden="true" class="svg-icon iconArrowDownLg" width="36" height="36" viewBox="0 0 36 36"><path d="M2 11h32L18 27 2 11Z"></path></svg> </button><div id="--stacks-s-tooltip-04106eqn" class="s-popover s-popovertooltip pe-none" aria-hidden="true" role="tooltip">This question does not show any research effort; it is unclear or not useful<div class="s-popover--arrow"></div></div> <div id="--stacks-s-tooltip-tgvwendx" class="s-popover s-popovertooltip pe-none" aria-hidden="true" role="tooltip">Bookmark this question.<div class="s-popover--arrow"></div></div> <a class="js-post-issue flex--item s-btn s-btnunset c-pointer py6 mx-auto" data-shortcut="T" data-ks-title="timeline" data-controller="s-tooltip" data-s-tooltip-placement="right" aria-label="Timeline" aria-describedby="--stacks-s-tooltip-abwmy15k"><svg aria-hidden="true" class="mln2 mr0 svg-icon iconHistory" width="19" height="18" viewBox="0 0 19 18"><path d="M3 9a8 8 0 1 1 3.73 6.77L8.2 14.3A6 6 0 1 0 5 9l3.01-.01-4 4-4-4h3L3 9Zm7-4h1.01L11 9.36l3.22 2.1-.6.93L10 10V5Z"></path></svg></a><div id="--stacks-s-tooltip-abwmy15k" class="s-popover s-popovertooltip pe-none" aria-hidden="true" role="tooltip">Show activity on this post.<div class="s-popover--arrow"></div></div> </div> </div> <div class="postcell post-layout--right"> <div class="s-prose js-post-body" itemprop="text"> <p>I have a website that allows the user to embed their videos using <code><iframe></code> tags such as .</p>

<pre><code><iframe width="560" height="315" src="http://www.youtube.com/embed/se2P7hjPanE" frameborder="0" allowfullscreen></iframe>
</code></pre>

<p>However, this is not a good idea since they can also input a website on src attribute and not a video. such as <code><iframe src="http://www.google.com"/></code></p>

<p>Is there anyway to handle this?</p>
 </div> <div class="mt24 mb12"> <div class="post-taglist d-flex gs4 gsy fd-column"> <div class="d-flex ps-relative fw-wrap"> <a href="/tags/php" class="post-tag js-gps-track" title="show questions tagged 'php'" rel="tag">php</a><a href="/tags/iframe" class="post-tag js-gps-track" title="show questions tagged 'iframe'" rel="tag">iframe</a><a href="/tags/html-entities" class="post-tag js-gps-track" title="show questions tagged 'html-entities'" rel="tag">html-entities</a> </div> </div> </div> </div> <span class="d-none" itemprop="commentCount">4</span> </div> </div> <div class="js-zone-container zone-container-responsive"> <div id="dfp-isb" class="everyonelovesstackoverflow everyonelovesinline-sidebar mx-auto" style="min-height: auto; height: auto; display: none;"></div> <div class="js-report-ad-button-container mx-auto" style="width: 300px"></div> </div> <div id="answers"> <a name="tab-top"></a> <div id="answers-header"> <div class="answers-subheader d-flex ai-center mb8"> <div class="flex--item fl1"> <h2 class="mb0" data-answercount=""> 1 回答 <span style="display:none;" itemprop="answerCount">1</span> </h2> </div> </div> </div> <a name="7"></a> <div id="answer-7" class="answer js-answer accepted-answer" data-answerid="7" data-parentid="4" data-score="506" data-position-on-page="1" data-highest-scored="1" data-question-has-accepted-highest-score="1" itemprop="suggestedAnswer" itemscope="" itemtype="https://schema.org/Answer"> <div class="post-layout"> <div class="votecell post-layout--left"> <div class="js-voting-container d-flex jc-center fd-column ai-stretch gs4 fc-black-200" data-post-id="7"> <button class="js-vote-up-btn flex--item s-btn s-btnunset c-pointer " data-controller="s-tooltip" data-s-tooltip-placement="right" aria-pressed="false" aria-label="Up vote" data-selected-classes="fc-theme-primary" data-unselected-classes="" aria-describedby="--stacks-s-tooltip-dgvag2l3"> <svg aria-hidden="true" class="svg-icon iconArrowUpLg" width="36" height="36" viewBox="0 0 36 36"><path d="M2 25h32L18 9 2 25Z"></path></svg> </button><div id="--stacks-s-tooltip-dgvag2l3" class="s-popover s-popovertooltip pe-none" aria-hidden="true" role="tooltip">This answer is useful<div class="s-popover--arrow"></div></div> <div class="js-vote-count flex--item d-flex fd-column ai-center fc-black-500 fs-title" itemprop="upvoteCount" data-value="1"> 1 </div> <button class="js-vote-down-btn flex--item s-btn s-btnunset c-pointer " data-controller="s-tooltip" data-s-tooltip-placement="right" aria-pressed="false" aria-label="Down vote" data-selected-classes="fc-theme-primary" data-unselected-classes="" aria-describedby="--stacks-s-tooltip-gn8ppsfv"> <svg aria-hidden="true" class="svg-icon iconArrowDownLg" width="36" height="36" viewBox="0 0 36 36"><path d="M2 11h32L18 27 2 11Z"></path></svg> </button> </div> </div> <div class="answercell post-layout--right"> <div class="s-prose js-post-body" itemprop="text"> <p>解析提交的 URL 并通过白名单过滤它们。任何不在列表中的都将被丢弃或放入队列等待管理员批准。</p> </div> <div class="mt24"> <div class="user-action-time" style="color:#999;text-align:right;">于 2013-04-25T09:29:00.563 回答</div> </div> </div> </div> </div></div> </div> <div id="sidebar" class="show-votes" role="complementary" aria-label="sidebar"> <div class="module sidebar-related"> <h4 id="h-related">Related</h4> <div class="related js-gps-related-questions" data-tracker="rq=1"> <div class="spacer"> <a href="/questions/12038871" title="Question score (upvotes - downvotes)"> <div class="answer-votes large">1</div> </a> <a href="/questions/12038871" class="question-hyperlink">.htaccess - 重写简单的url</a> </div><div class="spacer"> <a href="/questions/12038872" title="Question score (upvotes - downvotes)"> <div class="answer-votes large">1</div> </a> <a href="/questions/12038872" class="question-hyperlink">oracle - 将表索引从唯一修改为非唯一</a> </div><div class="spacer"> <a href="/questions/12038879" title="Question score (upvotes - downvotes)"> <div class="answer-votes large">2</div> </a> <a href="/questions/12038879" class="question-hyperlink">oracle - Oracle中客户端连接的MAC和IP地址</a> </div><div class="spacer"> <a href="/questions/12038881" title="Question score (upvotes - downvotes)"> <div class="answer-votes large">2</div> </a> <a href="/questions/12038881" class="question-hyperlink">java - Gwt TextInputCell 不显示更改的值</a> </div><div class="spacer"> <a href="/questions/12038882" title="Question score (upvotes - downvotes)"> <div class="answer-votes large">0</div> </a> <a href="/questions/12038882" class="question-hyperlink">java - 视觉力 Page 和 VF 组件通信</a> </div><div class="spacer"> <a href="/questions/12038884" title="Question score (upvotes - downvotes)"> <div class="answer-votes large">5</div> </a> <a href="/questions/12038884" class="question-hyperlink">c - 将 char 指针返回到不同的文件</a> </div><div class="spacer"> <a href="/questions/12038889" title="Question score (upvotes - downvotes)"> <div class="answer-votes large">1</div> </a> <a href="/questions/12038889" class="question-hyperlink">javascript - 从 jquery 插件调用函数</a> </div><div class="spacer"> <a href="/questions/12038893" title="Question score (upvotes - downvotes)"> <div class="answer-votes large">1</div> </a> <a href="/questions/12038893" class="question-hyperlink">r - 结合 R Markdown 和动画包</a> </div><div class="spacer"> <a href="/questions/12038896" title="Question score (upvotes - downvotes)"> <div class="answer-votes large">1</div> </a> <a href="/questions/12038896" class="question-hyperlink">bash - 使用 bash 工具处理日志文件</a> </div><div class="spacer"> <a href="/questions/12038898" title="Question score (upvotes - downvotes)"> <div class="answer-votes large">1</div> </a> <a href="/questions/12038898" class="question-hyperlink">ios - Facebook iOS SDK 中没有 FBRequestConnection</a> </div> </div> </div> <div class="module js-gps-related-tags" id="related-tags"> <h4 id="h-related-tags">Reference</h4> <div data-name="javascript"> <a href="https://php.github.net.cn" class="post-tag no-tag-menu js-gps-track" target="_blank">php</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">1429865</span> </span> </div> <div data-name="javascript"> <a href="https://c-cpp.com" class="post-tag no-tag-menu js-gps-track" target="_blank">c/c++</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">756500</span> </span> </div> <div data-name="javascript"> <a href="https://nginx.github.net.cn" class="post-tag no-tag-menu js-gps-track" target="_blank">nginx</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">49975</span> </span> </div> <div data-name="javascript"> <a href="https://mongodb.net.cn" class="post-tag no-tag-menu js-gps-track" target="_blank">mongodb</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">159057</span> </span> </div> <div data-name="javascript"> <a href="https://mybatis.net.cn" class="post-tag no-tag-menu js-gps-track" target="_blank">mybatis</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">3233</span> </span> </div> <div data-name="javascript"> <a href="https://anaconda.org.cn" class="post-tag no-tag-menu js-gps-track" target="_blank">anaconda</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">13410</span> </span> </div> <div data-name="javascript"> <a href="https://pycharm.net.cn" class="post-tag no-tag-menu js-gps-track" target="_blank">pycharm</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">14671</span> </span> </div> <div data-name="javascript"> <a href="https://python.github.net.cn" class="post-tag no-tag-menu js-gps-track" target="_blank">python</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">1902243</span> </span> </div> <div data-name="javascript"> <a href="https://vscode.github.net.cn" class="post-tag no-tag-menu js-gps-track" target="_blank">vscode</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">56040</span> </span> </div> <div data-name="javascript"> <a href="https://dockerdocs.cn" class="post-tag no-tag-menu js-gps-track" target="_blank">docker</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">110988</span> </span> </div> <div data-name="javascript"> <a href="https://github.net.cn" class="post-tag no-tag-menu js-gps-track" target="_blank">github</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">49000</span> </span> </div> <div data-name="javascript"> <a href="https://flask.github.net.cn" class="post-tag no-tag-menu js-gps-track" target="_blank">flask</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">49129</span> </span> </div> <div data-name="javascript"> <a href="https://ffmpeg.github.net.cn" class="post-tag no-tag-menu js-gps-track" target="_blank">ffmpeg</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">24037</span> </span> </div> <div data-name="javascript"> <a href="https://jmeter.net" class="post-tag no-tag-menu js-gps-track" target="_blank">jmeter</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">16910</span> </span> </div> <div data-name="javascript"> <a href="https://matplotlib.net" class="post-tag no-tag-menu js-gps-track" target="_blank">matplotlib</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">63493</span> </span> </div> <div data-name="javascript"> <a href="https://getbootstrap.net" class="post-tag no-tag-menu js-gps-track" target="_blank">bootstrap</a> <span class="item-multiplier"><span class="item-multiplier-x">×</span> <span class="item-multiplier-count">54641</span> </span> </div> </div> </div> </div> </div> </div> </div> <footer id="footer" class="site-footer js-footer" role="contentinfo"> <div class="site-footer--container"> <div class="site-footer--logo"> <a href="https://stackoverflow.com"><svg aria-hidden="true" class="native svg-icon iconLogoGlyphMd" width="32" height="37" viewBox="0 0 32 37"><path d="M26 33v-9h4v13H0V24h4v9h22Z" fill="#BCBBBB"/><path d="m21.5 0-2.7 2 9.9 13.3 2.7-2L21.5 0ZM26 18.4 13.3 7.8l2.1-2.5 12.7 10.6-2.1 2.5ZM9.1 15.2l15 7 1.4-3-15-7-1.4 3Zm14 10.79.68-2.95-16.1-3.35L7 23l16.1 2.99ZM23 30H7v-3h16v3Z" fill="#F48024"/></svg></a> </div> <nav class="site-footer--nav"> <div class="site-footer--col"> <h5 class="-title"><a href="https://stackoverflow.org.cn" class="js-gps-track" data-gps-track="footer.click({ location: 3, link: 15})">Stack Overflow 中文网</a></h5> <p>遵从 CC BY-SA 知识共享许可协议。</p> </div> </nav> </div> </footer> <script> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?709ff2ad9744e86b5b0eee677fc13ede"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); </script>  <script async src="https://www.googletagmanager.com/gtag/js?id=G-1MW5BV8G8E"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-1MW5BV8G8E'); </script> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-6117966252207595" crossorigin="anonymous"></script> </body> </html>