Table of Contents
常用的php图片处理类
Home php教程 php手册 常用的php图片处理类

常用的php图片处理类

Jun 13, 2016 am 09:00 AM
php main picture deal with article Summary use kind

常用的php图片处理类

   这篇文章主要汇总介绍了两个常用的php图片处理类(水印、等比缩放、固定高宽),非常的简单实用,有需要的小伙伴可以参考下

  常用的php图片处理类(水印、等比缩放、固定高宽)分享

  ?

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 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

?>

  示例二:

  ?

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

/**

*

* 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

$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

$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

 

//alpha

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

$alpha = ($alpha > 100 or $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 );

}

  以上所述就是本文的全部内容了,希望大家能够喜欢。

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

PHP Program to Count Vowels in a String PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? Apr 03, 2025 am 12:03 AM

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

PHP and Python: Comparing Two Popular Programming Languages PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

See all articles