Windows平台PHP+IECapt实现网页批量截图并创建缩略图功能详解

CREATE TABLE IF NOT EXISTS `t_url` (
 `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
 `url` varchar(100) NOT NULL,
 `pictype` tinyint(1) unsigned NOT NULL COMMENT '1.非比例缩略图2比例缩略图
 `flag` tinyint(1) NOT NULL DEFAULT '1' COMMENT '0.禁用1.可用
 PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=gbk COMMENT='url链接表' AUTO_INCREMENT=1 ;

<?php
//------------------------------------------------------------
//从表t_url中提取url链接,存放到数组$data中
//--------------------------------------------------------------
mysql_connect("localhost","root","123");
mysql_select_db("test");
$sql = "select * from t_url";
//选用sql语句$sql2 = "select * from t_url where pictype = 1 and flag = 1";
$query = mysql_query($sql);
//------------------------------------------
//生成批处理文件
//------------------------------------------
$expire_time = 10;  //代表10天,文件过期时间,86400秒/天
$i = 0;
foreach($row = mysql_fetch_array($query)){
 $url_md5 = md5($row['url']);
 $file_folder = 'img/';
 $filename = $file_folder.$url_md5.'.'.'jpg';
 $newname = $url_md5.'.'.'jpg';
 if (!file_exists($filename) || (filemtime ($filename) + $expire_time * 86400 < time()) ) {
    $str .= "if not exist ".$newname." (iecapt.exe --url=".$value['url']." --out=".$newname.")\r\n";
    if(($i % 30) == 0 && $i > 0){   //每30条为一个批处理文件
       $title = "title capt".$i.".bat\r\n";
       $str = $title.$str;
       $file_bat = fopen("img_tmp/capt".$i.".bat","w");
       if(fwrite($file_bat,$str)){
        echo "批处理文件capt".$i."生成成功<br>";
        $str = "";
       }
    }
    $i = $i+1;
 }
}
?>

<?php
mysql_connect("localhost","root","123456");
mysql_select_db("test");
if(!isset($_GET['ID'])){
 $_GET['ID'] = 1;
}
if($_GET['ID']){
 $sql = "select * from t_url id =".$_GET['ID'];
 $query = mysql_query($sql);
 $row = mysql_fetch_array($query);
 echo "<span style='color:#CE0000;'>正在生成缩略图:</span>".$row['id']."&nbsp;".$row['url']."<br><br>";
  $url = $row['url'];
  $url_md5 = md5($url);
  $pictype = $row['pictype'];
  $limit_time = 1;                         //创建 $limit_time日内创建的大图,天
  $thumbnails_folder = 'img_tmp/';             //保存临时大图的目录,必须以/结束
  $thumbnails_folder2 = 'img/';               //保存小图的目录,必须以/结束
  $output_format = 'jpg';
  $cached_filename = $thumbnails_folder.$url_md5.".".$output_format;
  $to_filename = $thumbnails_folder2 .$url_md5.'.'.$output_format;
    if((file_exists($cached_filename) || filemtime ($filename) + $limit_time*86400 > time())
     && !file_exists($to_filename)){
     if (filesize($cached_filename) > 1024){ //字节,不能是空白图片
       //创建缩略图
        include("image.class.php");
        $img = new Zubrag_image;
        // get parameters
        $img->image_type  = 2; // 1 = GIF, 2 = JPG, 3 = PNG
        $img->quality   = 80;
        $img->max_w    = 90;
        $img->max_h    = 67;
        $img->iscapt = ($pictype == 1) ? true : false; //此处用布尔型即可,数据库不可1.非比例缩略图2.按比例缩略
        if($img->GenerateThumbFile($cached_filename, $to_filename)){
         echo "<span style='color:#CE0000;'>成功创建缩略图:</span>".$row['id']."&nbsp;".$row['url'];
        }else{
         echo "<span style='color:#0000CE;'>未能创建缩略图:</span>".$row['id']."&nbsp;".$row['url'];
        }
      }
    }
 $sql = "select * from t_url id >".$_GET['ID']." and flag = 1 order by id asc limit 1";
 $query = mysql_query($sql);
 $row = mysql_fetch_array($query);
 echo "<br><span style='color:#0000CE;'>准备生成缩略图:</span>".$row['id']."&nbsp;".$row['url']."<br><br>";
 if($row['id']){
  echo "<script>window.location.href='create_image_img.php?ID=".$row['id']."';</script>";
 }else{
  $_GET['ID'] = "";
 }
}
?>

<?php
class Zubrag_image {
 var $iscapt = true;
 var $image_type = -1;
 var $quality = 100;
 var $max_w = 100;
 var $max_h = 100;
 function SaveImage($im, $filename) {
  $res = null;
  if(($this->image_type == 1) && !function_exists('imagegif')) $this->image_type = 3;
  switch ($this->image_type) {
   case 1:
    //if ($this->save_to_file) {
     $res = ImageGIF($im,$filename);
    //}
    //else {
    // header("Content-type: image/gif");
    // $res = ImageGIF($im);
    //}
    break;
   case 2:
     $res = ImageJPEG($im,$filename,$this->quality);
    break;
   case 3:
     $res = ImagePNG($im,$filename);
    break;
  }
  return $res;
 }
 function ImageCreateFromType($type,$filename) {
   $im = NULL;
   switch ($type) {
    case 1:
     $im = ImageCreateFromGif($filename);
     break;
    case 2:
     $im = ImageCreateFromJpeg($filename);
     break;
    case 3:
     $im = ImageCreateFromPNG($filename);
     break;
  }
  return $im;
 }
 function GenerateThumbFile($from_name, $to_name) {
  list($orig_x, $orig_y, $orig_img_type, $img_sizes) = GetImageSize($from_name);
  /*if ($this->cut_x > 0) $orig_x = min($this->cut_x, $orig_x);
  if ($this->cut_y > 0) $orig_y = min($this->cut_y, $orig_y);*/
    if ($this->iscapt && (($orig_y/$orig_x) > (90/67))) { //是截图,且高度过高
     $orig_y = $orig_x*(67/90);
    }
  $this->image_type = ($this->image_type != -1 ? $this->image_type : $orig_img_type);
  if ($orig_img_type < 1 or $orig_img_type > 3) die("Image type not supported");
  if ($this->image_type == 1) {
   $ni = imagecreate($this->max_w, $this->max_h);
  }
  else {
   $ni = imagecreatetruecolor($this->max_w,$this->max_h);
  }
  $white = imagecolorallocate($ni, 255, 255, 255);
  imagefilledrectangle( $ni, 0, 0, $this->max_w, $this->max_h, $white);
  $im = $this->ImageCreateFromType($orig_img_type,$from_name);
  imagepalettecopy($ni,$im);
  imagecopyresampled(
   $ni, $im,
   0, 0, 0, 0,
   $this->max_w, $this->max_h,
   $orig_x, $orig_y);
  if($this->SaveImage($ni, $to_name)){
     return true;
  }else{
     return false;
  }
 }
}
?>