首页 > php教程 > php手册 > PHP判断文件是否存在

PHP判断文件是否存在

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
发布: 2016-06-21 08:52:06
原创
1799 人浏览过

PHP判断文件是否存在,可使用如下代码:

<ol class="dp-c">
<li class="alt"><span><span class="comment">//判断远程文件是否存在 </span><span> </span></span></li>
<li>
<span class="keyword">function</span><span> remote_file_exists(</span><span class="vars">$url</span><span>) {  </span>
</li>
<li class="alt">
<span>    </span><span class="vars">$executeTime</span><span> = </span><span class="func">ini_get</span><span>(</span><span class="string">'max_execution_time'</span><span>);  </span>
</li>
<li>
<span>    </span><span class="func">ini_set</span><span>(</span><span class="string">'max_execution_time'</span><span>, 0);  </span>
</li>
<li class="alt">
<span>    </span><span class="vars">$headers</span><span> = @get_headers(</span><span class="vars">$url</span><span>);  </span>
</li>
<li>
<span>    </span><span class="func">ini_set</span><span>(</span><span class="string">'max_execution_time'</span><span>, </span><span class="vars">$executeTime</span><span>);  </span>
</li>
<li class="alt">
<span>    </span><span class="keyword">if</span><span> (</span><span class="vars">$headers</span><span>) {  </span>
</li>
<li>
<span>        </span><span class="vars">$head</span><span> = </span><span class="func">explode</span><span>(</span><span class="string">' '</span><span>, </span><span class="vars">$headers</span><span>[0]);  </span>
</li>
<li class="alt">
<span>        </span><span class="keyword">if</span><span> (!</span><span class="func">empty</span><span class="keyword">empty</span><span>(</span><span class="vars">$head</span><span>[1]) && </span><span class="func">intval</span><span>(</span><span class="vars">$head</span><span>[1]) <span class="keyword">return</span><span> true;  </span></span>
</li>
<li><span>    }  </span></li>
<li class="alt">
<span>    </span><span class="keyword">return</span><span> false;  </span>
</li>
<li><span>}  </span></li>
</ol>
登录后复制



相关标签:
本站声明
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系admin@php.cn
最新问题
热门推荐
热门教程
更多>
最新下载
更多>
网站特效
网站源码
网站素材
前端模板