What are the methods for obtaining remote files in php
Method: 1. Use the "file_get_contents($url)" statement to obtain; 2. Turn on curl and use curl_init(), curl_setopt() and other functions to obtain; 3. Use "fread(fopen("$url" ,"rb"),8192)" statement to obtain.
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
1.file_get_contents
$url = 'http://www.xxx.com/'; $contents = file_get_contents($url); //如果出现中文乱码使用下面代码 //$getcontent = iconv(“gb2312″, “utf-8″,file_get_contents($url)); //echo $getcontent; echo $contents; ?>
2.curl
url = “http://www.xxx.com/”; $ch = curl_init(); $timeout = 5; curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);//在需要用户检测的网页里需要增加下面两行 //curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY); //curl_setopt($ch, CURLOPT_USERPWD, US_NAME.”:”.US_PWD); $contents = curl_exec($ch); curl_close($ch); echo $contents;
3.fopen->fread-> fclose
$handle = fopen (“http://www.xxx.com/”, “rb”);
$contents = “”;
do {
$data = fread($handle, 8192);
if (strlen($data) == 0)
{break;}
$contents .= $data;
} while(true);
fclose ($handle);
echo $contents;file_get_contents, fopen, curl difference analysis:
1, Usefile_get_contents and fopen must be opened allow_url_fopen.
Method: Edit php.ini and set allow_url_fopen = On, allow_url_fopen When closed, neither fopen nor file_get_contents can be opened remote file.
2,Use curlmust open spacecurl .
Method: Modifyphp.ini under WIN and change extension=php_curl.dllRemove the semicolon in front, and you need to copy ssleay32.dll and libeay32.dll to C:\WINDOWS\system32; to
LinuxTo install the curl extension.
It is recommended to use thefile_get_contents() method when opening URL to optimize the opening speed Recommended learning: "
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