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Use PHP to analog logging in and accessing to data

Author: bamboo06 on 8-11-2014, 01:24, views: 1138

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cURL is a powerful PHP library, using PHP's cURL library can be simply and efficiently crawl the web and collect content, set the cookie to complete the simulation login page, curl provides a rich set of functions that developers can get more from the PHP manual About cURL information. In this paper, the simulation Login Open Source China (oschina) as an example, and share cURL use.
PHP's curl () in terms of efficiency crawled pages is relatively high, and supports multi-threading, and file_get_contents () would be slightly more efficient, of course, need to open when using curl under the curl extension.
Use PHP to analog logging in and accessing to data

Code combat
First look login part of the code:
//Analog Login
function login_post($url, $cookie, $post) { 
    $curl = curl_init();//Initialization curl module 
    curl_setopt($curl, CURLOPT_URL, $url);//Address Sign submitted 
    curl_setopt($curl, CURLOPT_HEADER, 0);//Whether to display the header information 
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 0);//Whether to automatically display the returned information
    curl_setopt($curl, CURLOPT_COOKIEJAR, $cookie); //Set Cookie information is saved in the specified file
    curl_setopt($curl, CURLOPT_POST, 1);//post submit
    curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($post));//submitting infomation
    curl_exec($curl);//execute cURL 
    curl_close($curl);//Close cURL resource, and free up system resources
} 

Function login_post () initializes curl_init (), then use curl_setopt () to set the relevant options, including url address to be submitted by the cookie file save, post data (user name and password information, etc.), whether to return information, etc., and then curl_exec execute curl, last curl_close () to release resources. Note that PHP comes http_build_query () can be converted to a string array connected.
Next, if the login is successful, we have to get after a successful login page information.
//After successful login to get data
function get_content($url, $cookie) { 
    $ch = curl_init(); 
    curl_setopt($ch, CURLOPT_URL, $url); 
    curl_setopt($ch, CURLOPT_HEADER, 0); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
    curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie); //read cookie 
    $rs = curl_exec($ch); //Perform cURL fetch page content
    curl_close($ch); 
    return $rs; 
} 

Function get_content () is also first initialize curl, and then set the relevant options, execute curl, release resources. Where we set CURLOPT_RETURNTRANSFER automatically return information for a while CURLOPT_COOKIEFILE can read the cookie information when you log saved, and finally return to the page content.
Our ultimate goal is to get to the post-simulation login information, which is useful information only after successful login in order to obtain normal.
Use summary
1. Initialization curl;
2, using the curl_setopt set the target url, and other options;
3, curl_exec, execute curl;
4, after the execution, close curl;
5, the output data.

Tags: log, access, curl, PHP

Category: PHP Scripts

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31 October 2017 01:16

Lucia Nash

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12 January 2018 23:56

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13 January 2018 07:13

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27 February 2018 00:59

sapepesubi

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