Generate web page snapshots in image format based on linnux phantomjs,

Generate web page snapshots in image format based on linnux phantomjs, _PHP tutorial

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Release： 2016-07-13 09:57:02

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Based on linnux phantomjs to generate web page snapshots in image format,

Install the extension:
(1) The following is my installation process on linux. If git is not installed, please first yum install git
Install casperjs

Copy code The code is as follows:
cd /
git clone git://github.com/n1k0/casperjs.git
cd casperjs
ln -sf /casperjs/bin/casperjs /usr/local/bin/casperjs //Can be ignored. In actual execution, php is executed /casperjs/bin/casperjs

(2) Install phantomjs, download address: http://phantomjs.org/download.html
After downloading, the operation is very simple. Just move the decompressed binphantomjs to usrlocalbinphantomjs.
can test phantomjs --version and the results will show no errors, indicating that the installation is OK

(3)Install fonts
1. First get a set of "Microsoft Yahei" font library (Google a lot), including two files msyh.ttf (normal), msyhbd.ttf (bold);
2. Create a subdirectory under the /usr/share/fonts directory, such as win, and the command is as follows:

Copy code The code is as follows:
# mkdir /usr/share/fonts/win

3. Copy msyh.ttf and msyhbd.ttf to this directory. For example, place these two files under /root/Desktop. Use the command:

Copy code The code is as follows:
# cd /root/Desktop
# cp msyh.ttf msyhbd.ttf /usr/share/fonts/win/

4. Create font index information and update font cache:

Copy code The code is as follows:
# cd /usr/share/fonts/win
                  # mkfontscale (If it prompts mkfontscale: command not found, you need to install it yourself # yum install mkfontscale)
             # mkfontdir
                 # fc-cache (if fc-cache: command not found is prompted, you need to install # yum install fontconfig)

At this point, the font has been installed!

<&#63;php 
  if (isset($_GET['url'])) 
  { 
    set_time_limit(0); 
  
    $url = trim($_GET['url']); 
    $filePath = md5($url).'.png'; 
    if (is_file($filePath)) 
    { 
      exit($filePath); 
    } 
 
    //如果不加这句就会报错“Fatal: [Errno 2] No such file or directory; did you install phantomjs&#63;”,详情参考http://mengkang.net/87.html
    putenv("PHANTOMJS_EXECUTABLE=/usr/local/bin/phantomjs");
    $command = "phantomjs phantomjs.js {$url} {$filePath}"; 
    @exec($command); 
  
    exit($filePath); 
  } 
&#63;> 
  
<!DOCTYPE html> 
<html> 
<head> 
<meta charset="utf-8" /> 
<meta name="viewport" content="width=device-width, initial-scale=1.0" /> 
<meta name="keywords" content="" /> 
<meta name="description" content="" /> 
<title>快照生成</title> 
<script src="http://code.jquery.com/jquery-1.8.3.min.js"></script> 
<style> 
* {margin: 0; padding: 0; } form {padding: 20px; } div {margin: 20px 0 0; } input {width: 200px; padding: 4px 2px; } #placeholder {display: none; } 
</style>
</head> 
  
<body> 
  <form action="" id="form"> 
    <input type="text" id="url" /> 
    <button type="submit">生成快照</button> 
  
    <div> 
      <img src="" alt="" id="placeholder" /> 
    </div> 
  </form> 
  <script> 
  $(function(){ 
    $('#form').submit(function(){ 
      if (typeof($(this).data('generate')) !== 'undefined' && $(this).data('generate') === true) 
      { 
        alert('正在生成网站快照，请耐心等待...'); 
        return false; 
      } 
  
      $(this).data('generate', true); 
      $('button').text('正在生成快照...').attr('disabled', true); 
  
      $.ajax({ 
        type: 'GET', 
        url: '&#63;', 
        data: 'url=' + $('#url').val(), 
        success: function(data){ 
          $('#placeholder').attr('src', data).show(); 
          $('#form').data('generate', false); 
          $('button').text('生成快照').attr('disabled', false); 
        } 
      }); 
  
      return false; 
    }); 
  }); 
  </script> 
</body> 
</html>

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var page = require('webpage').create(); 
var args = require('system').args; 
 
var url = args[1]; 
var filename = args[2]; 
 
page.open(url, function () { 
  page.render(filename); 
  phantom.exit(); 
});

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