常用的php图片处理类

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

<?php

//PHP 添加水印 & 比例缩略图 & 固定高度 & 固定宽度 类。

class Image_process{

public $source; //原图

public $source_width; //原图宽度

public $source_height; //原图高度

public $source_type_id;

public $orign_name;

public $orign_dirname;

//传入原图路径

public function __construct($source){

$this->typeList = array(1=>'gif',2=>'jpg',3=>'png');

$ginfo = getimagesize($source);

$this->source_width = $ginfo[0];

$this->source_height = $ginfo[1];

$this->source_type_id = $ginfo[2];

$this->orign_url = $source;

$this->orign_name = basename($source);

$this->orign_dirname = dirname($source);

}

//判断图片的文件的格式，返回PHP可识别的编码

public function judgeType($type,$source){

if($type == 1){

return imagecreatefromgif($source); //gif

}else if($type == 2){

return imagecreatefromjpeg($source); //jpg

}else if($type == 3){

return imagecreatefrompng($source); //png

}else{

return false;

}

}

//生成水印图片

public function waterMakeImage($logo){

$linfo = getimagesize($logo);

$logo_width = $linfo[0];

$logo_height = $linfo[1];

$logo_type_id = $linfo[2];

$sourceHandle = $this->judgeType($this->source_type_id,$this->orign_url);

$logoHandle = $this->judgeType($logo_type_id,$logo);

if(!$sourceHandle || !$logoHandle){

return false;

}

$x = ($this->source_width - $logo_width)/2;

$y = ($this->source_height - $logo_height)/2;

imagecopy($sourceHandle,$logoHandle,$x,$y,0,0,$logo_width,$logo_height);

$newPic = $this->orign_dirname.'\water_'.time().'.'.$this->typeList[$this->source_type_id];

if($this->saveImage($sourceHandle,$newPic)){

imagedestroy($sourceHandle);

imagedestroy($logoHandle);

}

}

//固定高度宽度

public function fixSizeImage($width,$height){

if($width > $this->source_width) $this->source_width;

if($height > $this->source_height) $this->source_height;

if($width === false){

$width = floor($this->source_width / ($this->source_height / $height));

}

if($height === false){

$height = floor($this->source_height / ($this->source_width / $width));

}

$this->tinyImage($width,$height);

}

//等比例缩放图片

public function scaleImage($scale){

$width = floor($this->source_width * $scale);

$height = floor($this->source_height * $scale);

$this->tinyImage($width, $height);

}

//创建缩略图

public function tinyImage($width,$height){

$tinyImage = imagecreatetruecolor($width,$height);

$handle = $this->judgeType($this->source_type_id,$this->orign_url);

if(function_exists('imagecopyresampled')){

imagecopyresampled($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height);

}else{

imagecopyresized($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height);

}

$newPic = $this->orign_dirname.'\thumb_'.time().'_'.$width."_".$height.".".$this->typeList[$this->source_type_id];

if($this->saveImage($tinyImage,$newPic)){

imagedestroy($tinyImage);

imagedestroy($handle);

}

}

//保存图片

private function saveImage($image,$url){

if(imagejpeg($image,$url)){

return true;

}

}

}

$imgHandle = new Image_process('D:\AppServ\www\test\getimg\14061907445601.jpg');

//$imgHandle->waterMakeImage('D:\AppServ\www\test\getimg\shougongke.png'); //生成水印图片

//$imgHandle->fixSizeImage(200,150); //固定长度图片

$imgHandle->scaleImage(0.2); //等比例缩放

?>

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

<?php

/**

*

* 图像处理类

* @author FC_LAMP

* @internal功能包含：水印,缩略图

*/

class Img

{

//图片格式

private $exts = array ('jpg', 'jpeg', 'gif', 'bmp', 'png' );

/**

*

*

* @throws Exception

*/

public function __construct()

{

if (! function_exists ( 'gd_info' ))

{

throw new Exception ( '加载GD库失败！' );

}

}

/**

*

* 裁剪压缩

* @param $src_img 图片

* @param $save_img 生成后的图片

* @param $option 参数选项，包括： $maxwidth 宽 $maxheight 高

* array('width'=>xx,'height'=>xxx)

* @internal

* 我们一般的压缩图片方法，在图片过长或过宽时生成的图片

* 都会被“压扁”，针对这个应采用先裁剪后按比例压缩的方法

*/

public function thumb_img($src_img, $save_img = '', $option)

{

if (empty ( $option ['width'] ) or empty ( $option ['height'] ))

{

return array ('flag' => False, 'msg' => '原图长度与宽度不能小于0' );

}

$org_ext = $this->is_img ( $src_img );

if (! $org_ext ['flag'])

{

return $org_ext;

}

//如果有保存路径，则确定路径是否正确

if (! empty ( $save_img ))

{

$f = $this->check_dir ( $save_img );

if (! $f ['flag'])

{

return $f;

}

}

//获取出相应的方法

$org_funcs = $this->get_img_funcs ( $org_ext ['msg'] );

//获取原大小

$source = $org_funcs ['create_func'] ( $src_img );

$src_w = imagesx ( $source );

$src_h = imagesy ( $source );

//调整原始图像(保持图片原形状裁剪图像)

$dst_scale = $option ['height'] / $option ['width']; //目标图像长宽比

$src_scale = $src_h / $src_w; // 原图长宽比

if ($src_scale >= $dst_scale)

{ // 过高

$w = intval ( $src_w );

$h = intval ( $dst_scale * $w );

$x = 0;

$y = ($src_h - $h) / 3;

} else

{ // 过宽

$h = intval ( $src_h );

$w = intval ( $h / $dst_scale );

$x = ($src_w - $w) / 2;

$y = 0;

}

// 剪裁

$croped = imagecreatetruecolor ( $w, $h );

imagecopy ( $croped, $source, 0, 0, $x, $y, $src_w, $src_h );

// 缩放

$scale = $option ['width'] / $w;

$target = imagecreatetruecolor ( $option ['width'], $option ['height'] );

$final_w = intval ( $w * $scale );

$final_h = intval ( $h * $scale );

imagecopyresampled ( $target, $croped, 0, 0, 0, 0, $final_w, $final_h, $w, $h );

imagedestroy ( $croped );

//输出(保存)图片

if (! empty ( $save_img ))

{

$org_funcs ['save_func'] ( $target, $save_img );

} else

{

header ( $org_funcs ['header'] );

$org_funcs ['save_func'] ( $target );

}

imagedestroy ( $target );

return array ('flag' => True, 'msg' => '' );

}

/**

*

* 等比例缩放图像

* @param $src_img 原图片

* @param $save_img 需要保存的地方

* @param $option 参数设置 array('width'=>xx,'height'=>xxx)

*

*/

function resize_image($src_img, $save_img = '', $option)

{

$org_ext = $this->is_img ( $src_img );

if (! $org_ext ['flag'])

{

return $org_ext;

}

//如果有保存路径，则确定路径是否正确

if (! empty ( $save_img ))

{

$f = $this->check_dir ( $save_img );

if (! $f ['flag'])

{

return $f;

}

}

//获取出相应的方法

$org_funcs = $this->get_img_funcs ( $org_ext ['msg'] );

//获取原大小

$source = $org_funcs ['create_func'] ( $src_img );

$src_w = imagesx ( $source );

$src_h = imagesy ( $source );

if (($option ['width'] && $src_w > $option ['width']) || ($option ['height'] && $src_h > $option ['height']))

{

if ($option ['width'] && $src_w > $option ['width'])

{

$widthratio = $option ['width'] / $src_w;

$resizewidth_tag = true;

}

if ($option ['height'] && $src_h > $option ['height'])

{

$heightratio = $option ['height'] / $src_h;

$resizeheight_tag = true;

}

if ($resizewidth_tag && $resizeheight_tag)

{

if ($widthratio < $heightratio)

$ratio = $widthratio;

else

$ratio = $heightratio;

}

if ($resizewidth_tag && ! $resizeheight_tag)

$ratio = $widthratio;

if ($resizeheight_tag && ! $resizewidth_tag)

$ratio = $heightratio;

$newwidth = $src_w * $ratio;

$newheight = $src_h * $ratio;

if (function_exists ( "imagecopyresampled" ))

{

$newim = imagecreatetruecolor ( $newwidth, $newheight );

imagecopyresampled ( $newim, $source, 0, 0, 0, 0, $newwidth, $newheight, $src_w, $src_h );

} else

{

$newim = imagecreate ( $newwidth, $newheight );

imagecopyresized ( $newim, $source, 0, 0, 0, 0, $newwidth, $newheight, $src_w, $src_h );

}

}

//输出(保存)图片

if (! empty ( $save_img ))

{

$org_funcs ['save_func'] ( $newim, $save_img );

} else

{

header ( $org_funcs ['header'] );

$org_funcs ['save_func'] ( $newim );

}

imagedestroy ( $newim );

return array ('flag' => True, 'msg' => '' );

}

/**

*

* 生成水印图片

* @param $org_img 原图像

* @param $mark_img 水印标记图像

* @param $save_img 当其目录不存在时，会试着创建目录

* @param array $option 为水印的一些基本设置包含：

* x:水印的水平位置,默认为减去水印图宽度后的值

* y:水印的垂直位置,默认为减去水印图高度后的值

* alpha:alpha值(控制透明度),默认为50

*/

public function water_mark($org_img, $mark_img, $save_img = '', $option = array())

{

//检查图片

$org_ext = $this->is_img ( $org_img );

if (! $org_ext ['flag'])

{

return $org_ext;

}

$mark_ext = $this->is_img ( $mark_img );

if (! $mark_ext ['flag'])

{

return $mark_ext;

}

//如果有保存路径，则确定路径是否正确

if (! empty ( $save_img ))

{

$f = $this->check_dir ( $save_img );

if (! $f ['flag'])

{

return $f;

}

}

//获取相应画布

$org_funcs = $this->get_img_funcs ( $org_ext ['msg'] );

$org_img_im = $org_funcs ['create_func'] ( $org_img );

$mark_funcs = $this->get_img_funcs ( $mark_ext ['msg'] );

$mark_img_im = $mark_funcs ['create_func'] ( $mark_img );

//拷贝水印图片坐标

$mark_img_im_x = 0;

$mark_img_im_y = 0;

//拷贝水印图片高宽

$mark_img_w = imagesx ( $mark_img_im );

$mark_img_h = imagesy ( $mark_img_im );

$org_img_w = imagesx ( $org_img_im );

$org_img_h = imagesx ( $org_img_im );

//合成生成点坐标

$x = $org_img_w - $mark_img_w;

$org_img_im_x = isset ( $option ['x'] ) ? $option ['x'] : $x;

$org_img_im_x = ($org_img_im_x > $org_img_w or $org_img_im_x < 0) ? $x : $org_img_im_x;

$y = $org_img_h - $mark_img_h;

$org_img_im_y = isset ( $option ['y'] ) ? $option ['y'] : $y;

$org_img_im_y = ($org_img_im_y > $org_img_h or $org_img_im_y < 0) ? $y : $org_img_im_y;

//alpha

$alpha = isset ( $option ['alpha'] ) ? $option ['alpha'] : 50;

$alpha = ($alpha > 100 or $alpha < 0) ? 50 : $alpha;

//合并图片

imagecopymerge ( $org_img_im, $mark_img_im, $org_img_im_x, $org_img_im_y, $mark_img_im_x, $mark_img_im_y, $mark_img_w, $mark_img_h, $alpha );

//输出(保存)图片

if (! empty ( $save_img ))

{

$org_funcs ['save_func'] ( $org_img_im, $save_img );

} else

{

header ( $org_funcs ['header'] );

$org_funcs ['save_func'] ( $org_img_im );

}

//销毁画布

imagedestroy ( $org_img_im );

imagedestroy ( $mark_img_im );

return array ('flag' => True, 'msg' => '' );

}

/**

*

* 检查图片

* @param unknown_type $img_path

* @return array('flag'=>true/false,'msg'=>ext/错误信息)

*/

private function is_img($img_path)

{

if (! file_exists ( $img_path ))

{

return array ('flag' => False, 'msg' => "加载图片 $img_path 失败！" );

}

$ext = explode ( '.', $img_path );

$ext = strtolower ( end ( $ext ) );

if (! in_array ( $ext, $this->exts ))

{

return array ('flag' => False, 'msg' => "图片 $img_path 格式不正确！" );

}

return array ('flag' => True, 'msg' => $ext );

}

/**

*

* 返回正确的图片函数

* @param unknown_type $ext

*/

private function get_img_funcs($ext)

{

//选择

switch ($ext)

{

case 'jpg' :

$header = 'Content-Type:image/jpeg';

$createfunc = 'imagecreatefromjpeg';

$savefunc = 'imagejpeg';

break;

case 'jpeg' :

$header = 'Content-Type:image/jpeg';

$createfunc = 'imagecreatefromjpeg';

$savefunc = 'imagejpeg';

break;

case 'gif' :

$header = 'Content-Type:image/gif';

$createfunc = 'imagecreatefromgif';

$savefunc = 'imagegif';

break;

case 'bmp' :

$header = 'Content-Type:image/bmp';

$createfunc = 'imagecreatefrombmp';

$savefunc = 'imagebmp';

break;

default :

$header = 'Content-Type:image/png';

$createfunc = 'imagecreatefrompng';

$savefunc = 'imagepng';

}

return array ('save_func' => $savefunc, 'create_func' => $createfunc, 'header' => $header );

}

/**

*

* 检查并试着创建目录

* @param $save_img

*/

private function check_dir($save_img)

{

$dir = dirname ( $save_img );

if (! is_dir ( $dir ))

{

if (! mkdir ( $dir, 0777, true ))

{

return array ('flag' => False, 'msg' => "图片保存目录 $dir 无法创建！" );

}

}

return array ('flag' => True, 'msg' => '' );

}

}

if (! empty ( $_FILES ['test'] ['tmp_name'] ))

{

//例子

$img = new Img ();

//原图

$name = explode ( '.', $_FILES ['test'] ['name'] );

$org_img = 'D:/test.' . end ( $name );

move_uploaded_file ( $_FILES ['test'] ['tmp_name'], $org_img );

$option = array ('width' => $_POST ['width'], 'height' => $_POST ['height'] );

if ($_POST ['type'] == 1)

{

$s = $img->resize_image ( $org_img, '', $option );

} else

{

$img->thumb_img ( $org_img, '', $option );

}

unlink ( $org_img );

}