File_get_contents cannot request https connection solution_PHP tutorial

The solution to the problem of being unable to request https connection using file_get_contents is very simple. We only need to turn on php_openssl. Of course, the Linux system needs to install the openssl module.

Under the default configuration of PHP.ini, using file_get_contents to read https links will result in the following error:

Warning: fopen() [function.fopen]: Unable to find the wrapper “https” – did you forget to enable it when you configured PHP?

There are 3 solutions:

1. For PHP under windows, just go to php.ini, delete the ; in front of extension=php_openssl.dll, and restart the service.
2. For PHP under Linux, you must install the openssl module. After installation, you can access it.

Installation method

Installation of OpenSSL library

Official website: http://www.openssl.org

Download page: http://www.openssl.org/source/

Select the latest version to download

http://www.openssl.org/source/openssl-1.0.0a.tar.gz

Unzip:

tar –zxvf openssl-1.0.0d.tar.gz, the decompression directory is: openssl-1.0.0d

Then enter cd openssl-1.0.0d to configure, compile and install

Configuration

./configure or ./config

Compile

make

Installation

make install

3. If you cannot modify the configuration of the server, then use the curl function to replace the file_get_contents function. Of course, it is not a simple replacement. There are also corresponding parameter configurations to use the curl function normally.

The curl function is encapsulated as follows:

The code is as follows  代码如下 复制代码 function http_request($url,$timeout=30,$header=array()){         if (!function_exists('curl_init')) {             throw new Exception('server not install curl');         }         $ch = curl_init();         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);         curl_setopt($ch, CURLOPT_HEADER, true);         curl_setopt($ch, CURLOPT_URL, $url);         curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);         if (!empty($header)) {             curl_setopt($ch, CURLOPT_HTTPHEADER, $header);         }         $data = curl_exec($ch);         list($header, $data) = explode("rnrn", $data);         $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);         if ($http_code == 301 || $http_code == 302) {             $matches = array();             preg_match('/Location:(.*?)n/', $header, $matches);             $url = trim(array_pop($matches));             curl_setopt($ch, CURLOPT_URL, $url);             curl_setopt($ch, CURLOPT_HEADER, false);             $data = curl_exec($ch);         }         if ($data == false) {             curl_close($ch);         }         @curl_close($ch);         return $data; }

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function http_request($url,$timeout=30,$header=array()){ If (!function_exists('curl_init')) {                 throw new Exception('server not install curl'); }           $ch = curl_init(); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);         curl_setopt($ch, CURLOPT_HEADER, true); ​​​​ curl_setopt($ch, CURLOPT_URL, $url);         curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);            if (!empty($header)) {                curl_setopt($ch, CURLOPT_HTTPHEADER, $header); }           $data = curl_exec($ch); list($header, $data) = explode("rnrn", $data);           $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE); If ($http_code == 301 || $http_code == 302) {                 $matches = array();                   preg_match('/Location:(.*?)n/', $header, $matches);                $url = trim(array_pop($matches)); ​​​​​​ curl_setopt($ch, CURLOPT_URL, $url);                curl_setopt($ch, CURLOPT_HEADER, false);                $data = curl_exec($ch); } if ($data == false) {                curl_close($ch); }            @curl_close($ch);          return $data; }