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PHP adds background example code to pictures

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Release： 2016-07-25 08:53:42
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  3. function overlayjpg($imgsrc,$imgdst,$width,$height="")

  4. {
  5. //$imgsrc jpg format image path $imgdst jpg format image save File name $imgwidth Width to change $imgheight Height to change
  6. //Get the width and height value of the image
  7. $arr = getimagesize($imgsrc);
  8. //Calculate the X-axis position of the image
  9. $img_X = ($width - $arr[0])/2;
  10. if($height == ""){
  11. $heights = $arr[1];
  12. $img_Y = 0;
  13. }
  14. else{
  15. if($height <= $ arr[1]){
  16. $heights = $arr[1];
  17. $img_Y = 0;
  18. }
  19. else{
  20. $heights = $height;
  21. $img_Y = ($height - $arr[1])/2 ;
  22. }
  23. }

  24. //$w = $arr[0];

  25. //$h = $arr[1];
  26. // Create image and define colors
  27. $image = imagecreatetruecolor($width,$heights); //Create a color basemap
  28. $bg = imagecolorallocate($image, 255, 255, 255);
  29. imagefill($image,0,0,$bg);
  30. $imgsrc = LoadIMG($imgsrc,$arr['mime']);
  31. imagecopy($image,$imgsrc,$img_X,$img_Y,0,0,$arr[0],$arr[1]);
  32. imagejpeg( $image,$imgdst,90);
  33. //imagedestroy($image);
  34. }
  35. // Load background image
  36. function LoadIMG($imgname,$mime)
  37. {
  38. if($mime == "image/gif" ){
  39. $im = @imagecreatefromgif($imgname); /* Attempt to open */
  40. }
  41. elseif ($mime == "image/png"){
  42. $im = @imagecreatefrompng($imgname); /* Attempt to open */
  43. }
  44. else{
  45. $im = @imagecreatefromjpeg($imgname); /* Attempt to open */
  46. }
  47. if(!$im) { /* See if it failed */
  48. $im = imagecreatetruecolor (150, 30); /* Create a blank image */
  49. $bgc = imagecolorallocate($im, 255, 255, 255);
  50. $tc = imagecolorallocate($im, 0, 0, 0);
  51. imagefilledrectangle($ im, 0, 0, 150, 30, $bgc);
  52. /* Output an errmsg */
  53. imagestring($im, 1, 5, 5, "Error loading $imgname", $tc);
  54. }
  55. return $ im;
  56. }

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php为图片增加背景实例代码
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