Gravatar 头像被墙及其解决方案

采用多种方法解决因为Gravatar被墙而导致的头像文件无法显示的问题，希望对您有用

前言

最近在某个群里看到好多问Gravatar被墙的事，因为WordPress使用了Gravatar的头像，可能会导致网页加载失败，最后还会留下裂图，很是影响用户体验，所以解决头像加载失败的方法刻不容缓。云落从网上收集了一些方法，给大家做个推荐，自己适合那种方法，自己看的办吧。

一、使用https加载

因为发现Gravatar还没死绝，https的还可以访问，所以使用https访问的也算是一种方案。在functions.php文件内添加以下代码

<span class="kwd"><span class="kwd">function</span></span><span class="pln"><span class="pln"> get_ssl_avatar</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$avatar</span></span><span class="pun"><span class="pun">)</span></span> <span class="pun"><span class="pun">{</span></span><span class="pln"><span class="pln">
$avatar </span></span><span class="pun"><span class="pun">=</span></span><span class="pln"><span class="pln"> preg_replace</span></span><span class="pun"><span class="pun">(</span></span><span class="str"><span class="str">'/.*\/avatar\/(.*)\?s=([\d]+)&.*/'</span></span><span class="pun"><span class="pun">,</span></span><span class="str"><span class="str">'<img src="https://secure.gravatar.com/avatar/$1?s=$2" class="avatar avatar-$2" height="$2" width="$2">'</span></span><span class="pun"><span class="pun">,</span></span><span class="pln"><span class="pln">$avatar</span></span><span class="pun"><span class="pun">);</span></span>
<span class="kwd"><span class="kwd">return</span></span><span class="pln"><span class="pln"> $avatar</span></span><span class="pun"><span class="pun">;</span></span>
<span class="pun"><span class="pun">}</span></span><span class="pln"><span class="pln">
add_filter</span></span><span class="pun"><span class="pun">(</span></span><span class="str"><span class="str">'get_avatar'</span></span><span class="pun"><span class="pun">,</span></span> <span class="str"><span class="str">'get_ssl_avatar'</span></span><span class="pun"><span class="pun">);</span></span>

二、WordPress本地缓存

在functions.php文件插入以下代码

<span class="kwd"><span class="kwd">function</span></span><span class="pln"><span class="pln"> my_avatar</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$avatar</span></span><span class="pun"><span class="pun">)</span></span> <span class="pun"><span class="pun">{</span></span><span class="pln"><span class="pln">
$tmp </span></span><span class="pun"><span class="pun">=</span></span><span class="pln"><span class="pln"> strpos</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$avatar</span></span><span class="pun"><span class="pun">,</span></span> <span class="str"><span class="str">'http'</span></span><span class="pun"><span class="pun">);</span></span><span class="pln"><span class="pln">
$g </span></span><span class="pun"><span class="pun">=</span></span><span class="pln"><span class="pln"> substr</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$avatar</span></span><span class="pun"><span class="pun">,</span></span><span class="pln"><span class="pln"> $tmp</span></span><span class="pun"><span class="pun">,</span></span><span class="pln"><span class="pln"> strpos</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$avatar</span></span><span class="pun"><span class="pun">,</span></span> <span class="str"><span class="str">"'"</span></span><span class="pun"><span class="pun">,</span></span><span class="pln"><span class="pln"> $tmp</span></span><span class="pun"><span class="pun">)</span></span> <span class="pun"><span class="pun">-</span></span><span class="pln"><span class="pln"> $tmp</span></span><span class="pun"><span class="pun">);</span></span><span class="pln"><span class="pln">
$tmp </span></span><span class="pun"><span class="pun">=</span></span><span class="pln"><span class="pln"> strpos</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$g</span></span><span class="pun"><span class="pun">,</span></span> <span class="str"><span class="str">'avatar/'</span></span><span class="pun"><span class="pun">)</span></span> <span class="pun"><span class="pun">+</span></span> <span class="lit"><span class="lit">7</span></span><span class="pun"><span class="pun">;</span></span><span class="pln"><span class="pln">
$f </span></span><span class="pun"><span class="pun">=</span></span><span class="pln"><span class="pln"> substr</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$g</span></span><span class="pun"><span class="pun">,</span></span><span class="pln"><span class="pln"> $tmp</span></span><span class="pun"><span class="pun">,</span></span><span class="pln"><span class="pln"> strpos</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$g</span></span><span class="pun"><span class="pun">,</span></span> <span class="str"><span class="str">"?"</span></span><span class="pun"><span class="pun">,</span></span><span class="pln"><span class="pln"> $tmp</span></span><span class="pun"><span class="pun">)</span></span> <span class="pun"><span class="pun">-</span></span><span class="pln"><span class="pln"> $tmp</span></span><span class="pun"><span class="pun">);</span></span><span class="pln"><span class="pln">
$w </span></span><span class="pun"><span class="pun">=</span></span><span class="pln"><span class="pln"> get_bloginfo</span></span><span class="pun"><span class="pun">(</span></span><span class="str"><span class="str">'wpurl'</span></span><span class="pun"><span class="pun">);</span></span><span class="pln"><span class="pln">
$e </span></span><span class="pun"><span class="pun">=</span></span><span class="pln"><span class="pln"> ABSPATH </span></span><span class="pun"><span class="pun">.</span></span><span class="str"><span class="str">'avatar/'</span></span><span class="pun"><span class="pun">.</span></span><span class="pln"><span class="pln"> $f </span></span><span class="pun"><span class="pun">.</span></span><span class="str"><span class="str">'.jpg'</span></span><span class="pun"><span class="pun">;</span></span><span class="pln"><span class="pln">
$t </span></span><span class="pun"><span class="pun">=</span></span> <span class="lit"><span class="lit">1209600</span></span><span class="pun"><span class="pun">;</span></span> <span class="com"><span class="com">//設定14天, 單位:秒</span></span>
<span class="kwd"><span class="kwd">if</span></span> <span class="pun"><span class="pun">(</span></span> <span class="pun"><span class="pun">!</span></span><span class="pln"><span class="pln">is_file</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$e</span></span><span class="pun"><span class="pun">)</span></span> <span class="pun"><span class="pun">||</span></span> <span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">time</span></span><span class="pun"><span class="pun">()</span></span> <span class="pun"><span class="pun">-</span></span><span class="pln"><span class="pln"> filemtime</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$e</span></span><span class="pun"><span class="pun">))</span></span> <span class="pun"><span class="pun">></span></span><span class="pln"><span class="pln"> $t </span></span><span class="pun"><span class="pun">)</span></span> <span class="pun"><span class="pun">{</span></span> <span class="com"><span class="com">//當頭像不存在或文件超過14天才更新</span></span><span class="pln"><span class="pln">
copy</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">htmlspecialchars_decode</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$g</span></span><span class="pun"><span class="pun">),</span></span><span class="pln"><span class="pln"> $e</span></span><span class="pun"><span class="pun">);</span></span>
<span class="pun"><span class="pun">}</span></span> <span class="kwd"><span class="kwd">else</span></span><span class="pln"><span class="pln">  $avatar </span></span><span class="pun"><span class="pun">=</span></span><span class="pln"><span class="pln"> strtr</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$avatar</span></span><span class="pun"><span class="pun">,</span></span><span class="pln"><span class="pln"> array</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$g </span></span><span class="pun"><span class="pun">=></span></span><span class="pln"><span class="pln"> $w</span></span><span class="pun"><span class="pun">.</span></span><span class="str"><span class="str">'/avatar/'</span></span><span class="pun"><span class="pun">.</span></span><span class="pln"><span class="pln">$f</span></span><span class="pun"><span class="pun">.</span></span><span class="str"><span class="str">'.jpg'</span></span><span class="pun"><span class="pun">));</span></span>
<span class="kwd"><span class="kwd">if</span></span> <span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">filesize</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$e</span></span><span class="pun"><span class="pun">)</span></span> <span class="pun"><span class="pun"><</span></span> <span class="lit"><span class="lit">500</span></span><span class="pun"><span class="pun">)</span></span><span class="pln"><span class="pln"> copy</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$w</span></span><span class="pun"><span class="pun">.</span></span><span class="str"><span class="str">'/avatar/default.jpg'</span></span><span class="pun"><span class="pun">,</span></span><span class="pln"><span class="pln"> $e</span></span><span class="pun"><span class="pun">);</span></span>
<span class="kwd"><span class="kwd">return</span></span><span class="pln"><span class="pln"> $avatar</span></span><span class="pun"><span class="pun">;</span></span>
<span class="pun"><span class="pun">}</span></span><span class="pln"><span class="pln">
add_filter</span></span><span class="pun"><span class="pun">(</span></span><span class="str"><span class="str">'get_avatar'</span></span><span class="pun"><span class="pun">,</span></span> <span class="str"><span class="str">'my_avatar'</span></span><span class="pun"><span class="pun">);</span></span>

在WordPress安装根目（即跟wp-content等文件夹同一目录下）下新建一个名为 avatar 的文件夹 ，并给予写权限。放入一张同尺寸的头像图片命名为default.jpg。

三、第三方缓存

这里说的第三方主要指的是多说，在functions.php文件插入以下代码

<span class="kwd"><span class="kwd">function</span></span><span class="pln"><span class="pln"> duoshuo_avatar</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">$avatar</span></span><span class="pun"><span class="pun">)</span></span> <span class="pun"><span class="pun">{</span></span><span class="pln"><span class="pln">
$avatar </span></span><span class="pun"><span class="pun">=</span></span><span class="pln"><span class="pln"> str_replace</span></span><span class="pun"><span class="pun">(</span></span><span class="pln"><span class="pln">array</span></span><span class="pun"><span class="pun">(</span></span><span class="str"><span class="str">"www.gravatar.com"</span></span><span class="pun"><span class="pun">,</span></span><span class="str"><span class="str">"0.gravatar.com"</span></span><span class="pun"><span class="pun">,</span></span><span class="str"><span class="str">"1.gravatar.com"</span></span><span class="pun"><span class="pun">,</span></span><span class="str"><span class="str">"2.gravatar.com"</span></span><span class="pun"><span class="pun">),</span></span><span class="str"><span class="str">"gravatar.duoshuo.com"</span></span><span class="pun"><span class="pun">,</span></span><span class="pln"><span class="pln">$avatar</span></span><span class="pun"><span class="pun">);</span></span>
<span class="kwd"><span class="kwd">return</span></span><span class="pln"><span class="pln"> $avatar</span></span><span class="pun"><span class="pun">;</span></span>
<span class="pun"><span class="pun">}</span></span><span class="pln"><span class="pln">
add_filter</span></span><span class="pun"><span class="pun">(</span></span> <span class="str"><span class="str">'get_avatar'</span></span><span class="pun"><span class="pun">,</span></span> <span class="str"><span class="str">'duoshuo_avatar'</span></span><span class="pun"><span class="pun">,</span></span> <span class="lit"><span class="lit">10</span></span><span class="pun"><span class="pun">,</span></span> <span class="lit"><span class="lit">3</span></span> <span class="pun"><span class="pun">);</span></span>