1 <?php
  2     // clearDir('upload/images/');
  3 
  4     if ($_FILES['file']['error'] == 0) {
  5         $MAX_FILE_SIZE = 300000;
  6         if ($_FILES['file']['size'] > $MAX_FILE_SIZE) {
  7             exit('檔案超出指定大小');
  8         }
  9         
 10         $allowSuffix = ['jpg', 'png', 'jpeg'];
 
 11         
 12         $myImg = explode('.', $_FILES['file']['name']);
 13         
 14         $mySuffix = array_pop($myImg);
 15         
 16         if (!in_array($mySuffix, $allowSuffix)) {
 17             exit('檔案型別不對');
 18         }
 19         
 20         $allowMine = [
 21             'image/jpg',
 22
 
             'image/jpeg',
 23             'image/pjpeg',
 24             'image/gif'
 25         ];
 26         
 27         if (!in_array($_FILES['file']['type'], $allowMine)) {
 28             exit('檔案mime型別不對');
 29         }
 30         
 31         $path = "upload/images/";
 32         $name = date('Ymdhis').mt_rand
 
(0, 9). '.' .$mySuffix;
 33         
 34         if(is_uploaded_file($_FILES['file']['tmp_name'])) {
 35             if (move_uploaded_file($_FILES['file']['tmp_name'], $path.$name)) {
 36                 $thumb_url = create_thumb($path.$name);
 37                 $thumb_url2 = create_thumb($path.$name, 200, true);
 38                 echo '上傳成功, 縮圖路徑為: '.$thumb_url;
 39                 echo '方縮圖路徑為: '.$thumb_url2;
 40             } else {
 41                 echo '上傳失敗';
 42             }
 43         } else {
 44             exit('不是上傳檔案');
 45         }
 46     } else {
 47         exit('上傳失敗');
 48     }
 49     
 50     /**
 51      * 給圖片生成縮圖
 52      */
 53     function create_thumb($url, $max_width = 200, $is_square = false) {
 54         $image = imagecreatefromjpeg($url);
 55         
 56         list($ow, $oh) = getimagesize($url);
 57         $path_arr = explode('.', $url);
 58         
 59         //如果要求生成正方形的縮圖
 60         if ($is_square) {
 61             if ($ow > $max_width) {
 62                 $nw = $max_width;
 63                 $new_image = imagecreatetruecolor($nw, $nw);
 64                 $white = imagecolorallocate($new_image, 255, 255, 255);
 65                 imagefilledrectangle($new_image, 0, 0, $nw, $nw, $white);
 66                 
 67                 $o_wh = $ow > $oh ? $oh : $ow;
 68                 imagecopyresampled($new_image, $image, 0, 0, 0, 0, $nw, $nw, $o_wh, $o_wh);
 69                 imagejpeg($new_image, $path_arr[0].'_thumbf.jpg');
 70                 return $path_arr[0].'_thumbf.jpg';
 71             } else {
 72                 $new_image = imagecreatetruecolor($ow, $ow);
 73                 $white = imagecolorallocate($new_image, 255, 255, 255);
 74                 imagefilledrectangle($new_image, 0, 0, $ow, $ow, $white);
 75                 
 76                 if ($ow > $oh) {
 77                     imagecopyresampled($new_image, $image, 0, ($ow -  $oh)/ 2, 0, 0, $ow, $oh, $ow, $oh);
 78                 } else {
 79                     imagecopyresampled($new_image, $image, 0, 0, 0, 0, $ow, $ow, $ow, $ow);
 80                 }
 81                 
 82                 imagejpeg($new_image, $path_arr[0].'_thumbf.jpg');
 83                 return $path_arr[0].'_thumbf.jpg';
 84             }
 85         } else {
 86             if ($ow > $max_width) {
 87                 $percent = $max_width / $ow;
 88                 $nw = $max_width;
 89                 $nh = $oh * $percent;
 90                 $new_image = imagecreatetruecolor($nw, $nh);
 91                 imagecopyresampled($new_image, $image, 0, 0, 0, 0, $nw, $nh, $ow, $oh);
 92                 
 93                 imagejpeg($new_image, $path_arr[0].'_thumb.jpg');
 94                 return $path_arr[0].'_thumb.jpg';
 95             } else {
 96                 $new_image = imagecreatetruecolor($ow, $oh);
 97                 $white = imagecolorallocate($new_image, 255, 255, 255);
 98                 imagefilledrectangle($new_image, 0, 0, $ow, $oh, $white);
 99                 imagecopyresampled($new_image, $image, 0, 0, 0, 0, $ow, $oh, $ow, $oh);
100                 imagejpeg($new_image, $path_arr[0].'_thumb.jpg');
101                 return $path_arr[0].'_thumb.jpg';
102             }
103         }
104     }
105     
106     //清空資料夾
107     function clearDir($dir) {
108         if (is_dir($dir)) {
109             if ($dh = opendir($dir)) {
110                 while ($file=readdir($dh)) {
111                     if (is_file($dir.$file)) {
112                         unlink($dir.$file);
113                     }
114                 }
115                 
116                 closedir($dh);
117             }
118         }
119     }
120 ?>