How to use curl to determine if the webpage 404 does not exist in PHP Original

The example in this article describes how PHP uses curl to determine the 404 (does not exist) page. Share it with everyone for your reference, the details are as follows:

<&#63;php
/* php使用curl判断404
 * Created on 2016-6-22
 * Writer www.jb51.net
 */
 function chkurl($url){
    $handle = curl_init($url);
    curl_setopt($handle, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($handle, CURLOPT_CONNECTTIMEOUT, 10);//设置超时时间
    curl_exec($handle);
    //检查是否404（网页找不到）
    $httpCode = curl_getinfo($handle, CURLINFO_HTTP_CODE);
    if($httpCode == 404) {
      return false;
    }else{
        return true;
    }
    curl_close($handle);
 }
 $url="http://www.jb51.net/asdasd.html";
 if(chkurl($url)==true){
     echo "存在";
 }else{
     echo "不存在";
 }
&#63;>

The operation result is: does not exist

Additional: Regarding HTTP request header information, you can refer to the online tool of this site:

HTTP status code encyclopedia:
http://tools.jb51.net/table/http_status_code

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php code online formatting and beautification tool:

http://tools.jb51.net/code/phpformat

In addition, since php belongs to the C language style, the following tool can also implement php code Formatting:

C language style/HTML/CSS/json code formatting and beautification tool:
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I hope this article will be helpful to everyone in PHP programming.

The above introduces how PHP uses curl to determine that the webpage 404 does not exist. It is original and includes relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.