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PHP添加水印&比例缩略图&固定高度&固定宽度类。

时间：2021-07-01 10:21:17 帮助过：22人阅读

  1. //PHP 添加水印 & 比例缩略图 & 固定高度 & 固定宽度 类。
  2. class Image_process{
  3. public $source; //原图
  4. public $source_width; //原图宽度
  5. public $source_height; //原图高度
  6. public $source_type_id;
  7. public $orign_name;
  8. public $orign_dirname;
  10. //传入原图路径
  11. public function __construct($source){
  12. $this->typeList = array(1=>'gif',2=>'jpg',3=>'png');
  13. $ginfo = getimagesize($source);
  14. $this->source_width = $ginfo[0];
  15. $this->source_height = $ginfo[1];
  16. $this->source_type_id = $ginfo[2];
  17. $this->orign_url = $source;
  18. $this->orign_name = basename($source);
  19. $this->orign_dirname = dirname($source);
  20. }
  22. //判断图片的文件的格式，返回PHP可识别的编码
  23. public function judgeType($type,$source){
  24. if($type == 1){
  25. return imagecreatefromgif($source); //gif
  26. }else if($type == 2){
  27. return imagecreatefromjpeg($source); //jpg
  28. }else if($type == 3){
  29. return imagecreatefrompng($source); //png
  30. }else{
  31. return false;
  32. }
  33. }
  35. //生成水印图片
  36. public function waterMakeImage($logo){
  37. $linfo = getimagesize($logo);
  38. $logo_width = $linfo[0];
  39. $logo_height = $linfo[1];
  40. $logo_type_id = $linfo[2];
  41. $sourceHandle = $this->judgeType($this->source_type_id,$this->orign_url);
  42. $logoHandle = $this->judgeType($logo_type_id,$logo);
  43. if(!$sourceHandle || !$logoHandle){
  44. return false;
  45. }
  46. $x = ($this->source_width - $logo_width)/2;
  47. $y = ($this->source_height - $logo_height)/2;
  48. imagecopy($sourceHandle,$logoHandle,$x,$y,0,0,$logo_width,$logo_height);
  49. $newPic = $this->orign_dirname.'\water_'.time().'.'.$this->typeList[$this->source_type_id];
  50. if($this->saveImage($sourceHandle,$newPic)){
  51. imagedestroy($sourceHandle);
  52. imagedestroy($logoHandle);
  53. }
  54. }
  56. //固定高度宽度
  57. public function fixSizeImage($width,$height){
  58. if($width > $this->source_width) $this->source_width;
  59. if($height > $this->source_height) $this->source_height;
  60. if($width === false){
  61. $width = floor($this->source_width / ($this->source_height / $height));
  62. }
  63. if($height === false){
  64. $height = floor($this->source_height / ($this->source_width / $width));
  65. }
  66. $this->tinyImage($width,$height);
  67. }
  69. //等比例缩放图片
  70. public function scaleImage($scale){
  71. $width = floor($this->source_width * $scale);
  72. $height = floor($this->source_height * $scale);
  73. $this->tinyImage($width, $height);
  74. }
  76. //创建缩略图
  77. public function tinyImage($width,$height){
  78. $tinyImage = imagecreatetruecolor($width,$height);
  79. $handle = $this->judgeType($this->source_type_id,$this->orign_url);
  80. if(function_exists('imagecopyresampled')){
  81. imagecopyresampled($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height);
  82. }else{
  83. imagecopyresized($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height);
  84. }
  85. $newPic = $this->orign_dirname.'\thumb_'.time().'_'.$width."_".$height.".".$this->typeList[$this->source_type_id];
  86. if($this->saveImage($tinyImage,$newPic)){
  87. imagedestroy($tinyImage);
  88. imagedestroy($handle);
  89. }
  90. }
  91. //保存图片
  92. private function saveImage($image,$url){
  93. if(imagejpeg($image,$url)){
  94. return true;
  95. }
  96. }
  97. }
  98. $imgHandle = new Image_process('D:\AppServ\www\test\getimg\14061907445601.jpg');
  99. //$imgHandle->waterMakeImage('D:\AppServ\www\test\getimg\shougongke.png'); //生成水印图片
  100. //$imgHandle->fixSizeImage(200,150); //固定长度图片
  101. $imgHandle->scaleImage(0.2); //等比例缩放
  102. ?>

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