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: Modify

php.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

Linux

To install the curl extension.

It is recommended to use the

file_get_contents() method when opening URL to optimize the opening speed Recommended learning: "

PHP Video Tutorial

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