混合內(nèi)容警告出現(xiàn)是因?yàn)榫W(wǎng)站遷移到HTTPS後仍有元素通過HTTP加載。當(dāng)HTTPS頁面引用HTTP資源如圖片、腳本或樣式表時(shí)，瀏覽器會(huì)標(biāo)記為混合內(nèi)容，存在安全風(fēng)險(xiǎn)。混合內(nèi)容分兩種：主動(dòng)（如JavaScript或CSS文件，通常被瀏覽器阻止）和被動(dòng)（如圖片或視頻，仍被標(biāo)記）。常見來源包括HTML中硬編碼的HTTP鏈接、外部腳本、CSS背景圖或字體、CMS或插件設(shè)置不當(dāng)?shù)?。解決方法有：1.查找並替換代碼中的“http://”為相對(duì)URL或“https://”；2.使用瀏覽器開發(fā)者工具檢查失敗請(qǐng)求；3.更新CMS設(shè)置、插件或主題；4.使用協(xié)議相對(duì)URL；5.確保CDN支持HTTPS；6.使用WordPress插件自動(dòng)處理。預(yù)防措施包括：設(shè)置HTTP到HTTPS重定向、使用CSP頭、檢查第三方嵌入內(nèi)容、定期審計(jì)站點(diǎn)。

You're seeing a "mixed content" warning after moving to HTTPS because some elements on your site are still loading over HTTP. When a page is served over HTTPS but includes resources like images, scripts, or stylesheets from HTTP URLs, browsers flag this as mixed content — a security risk.

Here's how to fix it and why it happens:

What Exactly Is Mixed Content?

Mixed content occurs when a secure HTTPS page pulls in assets using the insecure HTTP protocol. Browsers consider this dangerous because those unencrypted resources could be tampered with during transit.

There are two types:

• Active mixed content – things like JavaScript or CSS files that can manipulate the page. Browsers usually block these outright.
• Passive mixed content – things like images or videos. These are less risky but still flagged.

The result? A warning in the browser console or address bar, and sometimes a broken padlock icon.

Common Sources of Mixed Content Warnings

Some common culprits include:

• Hardcoded HTTP URLs in HTML or templates (eg, <img src="/static/imghw/default1.png" data-src="http://example.com/image.jpg" class="lazy" alt="搬到HTTPS後，為什麼我會(huì)收到'混合內(nèi)容”警告？" > )
• External scripts or embeds (like ads, tracking pixels, or third-party widgets)
• CSS background images or fonts loaded via HTTP
• Incomplete CMS or plugin settings that still use HTTP

Even if your main site is HTTPS, any external resource loaded without HTTPS will tr??igger a warning.

How to Fix Mixed Content Issues

To resolve these warnings, you need to make sure all resources are pulled in securely. Here's how:

• Search your code for “http://” and replace them with relative URLs or switch to “https://”
• Use the browser's developer tools (Network tab) to see which requests are failing due to mixed content
• Update CMS settings, plugins, or themes that might be pulling in outdated URLs
• Use protocol-relative URLs (rarely needed now): //example.com/resource.js instead of http://example.com/resource.js
• If using a CDN, make sure it supports HTTPS and update your links accordingly

Many content management systems like WordPress have plugins that help automate this process (eg, Better Search Replace or Really Simple SSL).

Prevent Future Mixed Content Problems

Once you've fixed existing issues, take steps to avoid new ones:

• Set up redirects from HTTP to HTTPS
• Use Content Security Policy (CSP) headers to enforce HTTPS-only resource loading
• Always check third-party embeds before adding them
• Regularly audit your site with tools like Google Chrome DevTools or Why No Padlock?

HTTPS is standard now, but it only works if everything on the page plays nicely with it.

It's not complicated once you know where to look, but easy to miss a few stray HTTP links — especially if they come from plugins or embedded content. Fixing mixed content is mostly about attention to detail.

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