PHP获取网站图标（favicon.ico）文件

有的 网站 源码中加入了这几行代码： 1 link rel ="shortcut icon" href ="/favicon.ico" type ="image/x-icon" / 或者是 1 link rel =" icon" href ="/favicon.ico" type ="image/x-icon" / 这样可以指定 图标 位置存放。 但现在的浏览器大多支持自动 获取

　　有的网站源码中加入了这几行代码：

<span>1</span> <span><</span><span>link </span><span>rel</span><span>="shortcut icon"</span><span> href</span><span>="/favicon.ico"</span><span> type</span><span>="image/x-icon"</span> <span>/></span>

　　或者是

<span>1</span> <span><</span><span>link </span><span>rel</span><span>=" icon"</span><span> href</span><span>="/favicon.ico"</span><span> type</span><span>="image/x-icon"</span> <span>/></span>

　　这样可以指定图标位置存放。

　　但现在的浏览器大多支持自动获取网站根目录下的.ico文件，所以源码中看不到那几行代码。

　　可行的方法：

　　

<span> 1</span>             <span>//</span><span>得到每一个url，<strong>获取</strong>其中的icon</span>
<span> 2</span>             <span>$url</span> = <span>$matches</span>[1][<span>$i</span><span>];
</span><span> 3</span>             <span>$contents</span> = @<span>file_get_contents</span>(<span>$url</span><span>); 
</span><span> 4</span>             <span>preg_match</span>('/<link rel=".*?icon".*?href="(.*?)".*?>/', <span>$contents</span>,<span>$icon</span><span>);
</span><span> 5</span>             <span>if</span>(!<span>empty</span>(<span>$icon</span><span>)){
</span><span> 6</span>                 <span>//</span><span> print_r($icon[1]);</span>
<span> 7</span>                 <span>echo</span> "<br/>"<span>;
</span><span> 8</span>                 <span>$array</span> = @<span>get_headers</span>(<span>$icon</span>[1],1<span>); 
</span><span> 9</span>                 <span>if</span>(<span>preg_match</span>('/200/',<span>$array</span>[0<span>])){ 
</span><span>10</span>                     <span>//</span><span> echo "<pre/>"; </span>
<span>11</span>                     <span>print_r</span>(<span>$icon</span>[1<span>]);
</span><span>12</span>                     <span>echo</span> "<img src='".<span>$icon</span>[1]."' >;
<span>13</span>                     <span>//</span><span> echo "string";
</span><span>14</span> <span>                    // print_r($array); </span>
<span>15</span>                 }<span>else</span><span>{ 
</span><span>16</span>                     <span>//</span><span>去掉多余的斜杠</span>
<span>17</span>                     <span>$url</span> = <span>substr_replace</span>(<span>$url</span>,"",-1<span>);
</span><span>18</span>                     <span>echo</span> "无效url资源！".<span>$url</span>.<span>$icon</span>[1<span>]; 
</span><span>19</span>                     <span>echo</span> "<img src='".<span>$url</span>.<span>$icon</span>[1]."' >;
<span>20</span> <span>                }
</span><span>21</span> 
<span>22</span>             }<span>else</span><span>{
</span><span>23</span>                 <span>//</span><span>这里笔者试了很多种方法，后来发现通过url可以入手，从url截取网址的根目录，由于习惯性的把<strong>文件</strong>名名为favicon.ico，所以可以直接访问类似这样的url得到<strong>图标</strong><strong>文件</strong>，http://wenwen.sogou.com/favicon.ico</span>
<span>24</span>                 <span>$url</span>=<span>substr</span>(<span>$url</span>,7);<span>//</span><span>去除前面</span>
<span>25</span>                 <span>$position</span> = <span>strpos</span>(<span>$url</span>, '/'<span>);
</span><span>26</span>                 <span>$url</span>=<span>substr</span>(<span>$url</span>,0,<span>$position</span><span>);
</span><span>27</span>                 <span>echo</span> "<img src='http://".<span>$url</span>."/favicon.ico' >;
<span>28</span>                 <span>//</span><span> echo $url."/favicon.ico<br/>";
</span><span>29</span> <span>                //判断<strong>网站</strong>的根目录是否存在.icon<strong>文件</strong>
</span><span>30</span> <span>                // $url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]; 
</span><span>31</span> <span>                // echo dirname($url);
</span><span>32</span> <span>                // if(file_exists("favicon.ico"))
</span><span>33</span> <span>                //     echo "<p>存在</p>";</span>
<span>34</span>             }

　　思路：

　　　　先判断源码中是否有那几行添加iocn的代码，如果有就直接抓取代码，再判断是否为有效的url，然后再判断显示，没有则获取根目录后显示。