PHP image operations: 3D images, scaling, rotating, cropping, and adding watermarks (3)

PHP image operations: 3D images, scaling, rotating, cropping, and adding watermarks (3)

Source: http://www.ido321.com/887.html

5. PHP rotating Images

   1: 

2: Before Rotation

   3:     

   4: 

5:
 
   6: header("content-type","text/html;charset=utf-8");
   7:  
   8: /*
9: * The image is rotated along the Y axis. The png format is used as an example.
10: * @ param string $ filename url of the image
  11: */
  12: function turn_y($filename)
  13: {
14:/* Create Image Resources */
  15:     $backy = imagecreatefrompng($filename);
  16:  
17:/* Get size */
  18:     $widthy = imagesx($backy);
  19:     $heighty = imagesy($backy);
  20:  
21:/* create a new image resource and save the flipped image */
  22:     $newy = imagecreatetruecolor($widthy, $heighty);
  23:  
24:/* flip along the Y axis, that is, copy the source image one by one from right to left to the new resource */
  25:     for ($i=0; $i < $widthy; $i++) { 
  26:         imagecopy($newy,$backy,$widthy-$i-1,0,$i,0,1,$heighty);
  27:     }
  28:  
29:/* Save the flipped image */
  30:     imagepng($newy,'http://www.bkjia.com/uploads/allimg/141009/0425435558-1.png');
  31:  
32:/* release resources */
  33:     imagedestroy($backy);
  34:     imagedestroy($newy);
  35: }
  36:  
  37: /*
38: * The image is rotated along the X axis. The png format is used as an example.
39: * @ param string $ filename url of the image
  40: */
  41: function turn_x($filename)
  42: {
43:/* Create Image Resources */
  44:     $backx = imagecreatefrompng($filename);
  45:  
46:/* Get the size */
  47:     $widthx = imagesx($backx);
  48:     $heightx = imagesy($backx);
  49:  
50:/* create a new image resource and save the flipped image */
  51:     $newx = imagecreatetruecolor($widthx, $heightx);
  52:  
53:/* flip along the X axis, that is, copy the source image one by one from top to bottom to the new resource in a pixel width */
  54:     for ($i=0; $i < $heightx; $i++) { 
  55:         imagecopy($newx,$backx,0,$heightx-$i-1,0,$i,$widthx,1);
  56:     }
  57:  
58:/* Save the flipped image */
  59:     imagepng($newx,'http://www.bkjia.com/uploads/allimg/141009/0425432228-2.png');
  60:  
61:/* release resources */
  62:     imagedestroy($backx);
  63:     imagedestroy($newx);
  64: }
65:/* call a function */
  66: turn_y('http://www.bkjia.com/uploads/allimg/141009/0425435O8-0.png');
  67: turn_x('http://www.bkjia.com/uploads/allimg/141009/0425435O8-0.png');
  68: ?>
  69: 
70: rotate along the Y axis
  71:     
  72: 
  73: 
74: rotate along the X axis
  75:     
  76: 
Effect