php判断远程图片是否存在
- function img_exits($url)
- {
- $ch = curl_init();
- curl_setopt($ch, curlopt_url,$url);
- curl_setopt($ch, curlopt_nobody, 1);
- curl_setopt($ch, curlopt_failonerror, 1);
- curl_setopt($ch, curlopt_returntransfer, 1);
-
- if(curl_exec($ch)!==false)
- return true;
- else
- return false;
- }
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- function img_exists($url)
- {
- if(file_get_contents($url,0,null,0,1))
- return 1;
- else
- return 0;
- }
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- /开源代码phpfensi.com
- $url='http://www.phpfensi.com/';
- echo url_exists($url);
-
- function url_exists($url) {
-
- $head=@get_headers($url);
- if(is_array($head)) {
- return true;
- }
- return false;
-
- }
-
- ?>
-
- 网页方法,代码如下:
- <script language= "javascript">
- function geturl(url)
- {
- var xmlhttp = new activexobject( "microsoft.xmlhttp ");
- xmlhttp.open( "get ",url,false);
- xmlhttp.send();
- if (xmlhttp.readystate==4)
- alert((xmlhttp.status==200)? "文件存在 ": "文件不存在 ");
- }
- </script>
- 请输入文件地址: <input name= "file " id= "file " value= "http://www.phpfensi.com ">
- <button onclick= "geturl(file.value) "> 检测地址 </button>
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