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PHP code to save images as images of different specifications

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Release： 2016-07-25 09:03:39
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  3. /**

  4. Image processing class
  5. */
  6. class imagecls
  7. {
  8. /**
  9. *File information
  10. */
  11. var $file = array();
  12. /**
  13. * Save directory
  14. */
  15. var $dir = '';
  16. /**
  17. * Error code
  18. */
  19. var $error_code = 0;
  20. /**
  21. *Maximum file upload size KB
  22. */
  23. var $max_size = -1;

  24. function es_imagecls()

  25. {

  26. }

  28. private function checkSize($size)
  29. {
  30. return !($size > $this->max_size) || (-1 == $this->max_size);
  31. }
  33. /**
  34. * Process uploaded files
  35. * @param array $file Uploaded files
  36. * @param string $dir Saved directory
  37. * @return bool
  38. */
  39. function init($file, $dir = 'temp')
  40. {
  41. if(!is_array($file) || empty($file) || !$this->isUploadFile($file['tmp_name']) || trim($file['name']) == '' || $file['size'] == 0)
  42. {
  43. $this->file = array();
  44. $this->error_code = -1;
  45. return false;
  46. }
  47. else
  48. {
  49. $file['size'] = intval($file['size']);
  50. $file['name'] = trim($file['name']);
  51. $file['thumb'] = '';
  52. $file['ext'] = $this->fileExt($file['name']);
  53. $file['name'] = htmlspecialchars($file['name'], ENT_QUOTES);
  54. $file['is_image'] = $this->isImageExt($file['ext']);
  55. $file['file_dir'] = $this->getTargetDir($dir);
  56. $file['prefix'] = md5(microtime(true)).rand(10,99);
  57. $file['target'] = "./public/".$file['file_dir'].'/'.$file['prefix'].'.jpg'; //相对
  58. $file['local_target'] = APP_ROOT_PATH."public/".$file['file_dir'].'/'.$file['prefix'].'.jpg';//物理
  59. $this->file = &$file;
  60. $this->error_code = 0;
  61. return true;
  62. }
  63. }

  64. /**

  65. * Save file
  66. * @return bool
  67. */
  68. function save()
  69. {
  70. if(empty($this->file) || empty($this->file['tmp_name']))
  71. $this->error_code = -101;
  72. elseif(!$this->checkSize($this->file['size']))
  73. $this->error_code = -105;
  74. elseif(!$this->file['is_image'])
  75. $this->error_code = -102;
  76. elseif(!$this->saveFile($this->file['tmp_name'], $this->file['local_target']))
  77. $this->error_code = -103;
  78. elseif($this->file['is_image'] &&
  79. (!$this->file['image_info'] = $this->getImageInfo($this->file['local_target'], true)))
  80. {
  81. $this->error_code = -104;
  82. @unlink($this->file['local_target']);
  83. }
  84. else
  85. {
  86. $this->error_code = 0;
  87. return true;
  88. }
  89. return false;
  90. }

  91. /**

  92. * Get error code
  93. * @return number
  94. */
  95. function error()
  96. {
  97. return $this->error_code;
  98. }

  99. /**

  100. * Get file extension
  101. * @return string
  102. */
  103. function fileExt($file_name)
  104. {
  105. return addslashes(strtolower(substr(strrchr($file_name, '.'), 1, 10)));
  106. }

  107. /**

  108. * Determine whether the file is an image based on the extension
  109. * @param string $ext extension
  110. * @return bool
  111. */
  112. function isImageExt($ext)
  113. {
  114. static $img_ext = array('jpg', 'jpeg', 'png', 'bmp','gif','giff');
  115. return in_array($ext, $img_ext) ? 1 : 0;
  116. }

  117. /**

  118. * Get image information
  119. * @param string $target file path
  120. * @return mixed
  121. */
  122. function getImageInfo($target)
  123. {
  124. $ext = es_imagecls::fileExt($target);
  125. $is_image = es_imagecls::isImageExt($ext);

  126. if(!$is_image)

  127. return false;
  128. elseif(!is_readable($target))
  129. return false;
  130. elseif($image_info = @getimagesize($target))
  131. {
  132. list($width, $height, $type) = !empty($image_info) ? $image_info :
  133. array('', '', '');
  134. $size = $width * $height;
  135. if($is_image && !in_array($type, array(1,2,3,6,13)))
  136. return false;

  137. $image_info['type'] =

  138. strtolower (substr(image_type_to_extension($image_info[2]),1));
  139. return $image_info;
  140. }
  141. else
  142. return false;
  143. }

  144. /**

  145. * Get whether uploading files is allowed
  146. * @param string $source file path
  147. * @return bool
  148. */
  149. function isUploadFile($source)
  150. {
  151. return $source && ($source != 'none') &&
  152. (is_uploaded_file($source) || is_uploaded_file(str_replace('\', '', $source)));
  153. }

  154. /**

  155. * Get the saved path
  156. * @param string $dir specified saving directory
  157. * @return string
  158. */
  159. function getTargetDir($dir)
  160. {
  161. if (!is_dir(APP_ROOT_PATH."public/".$dir)) {
  162. @mkdir(APP_ROOT_PATH."public/".$dir);
  163. @chmod(APP_ROOT_PATH."public/".$dir, 0777);
  164. }
  165. return $dir;
  166. }

  167. /**

  168. * Save file
  169. * @param string $source source file path
  170. * @param string $target directory file path
  171. * @return bool
  172. */
  173. private function saveFile($source, $target)
  174. {
  175. if(!es_imagecls::isUploadFile($source))
  176. $succeed = false;
  177. elseif(@copy($source, $target))
  178. $succeed = true;
  179. elseif(function_exists('move_uploaded_file') &&
  180. @move_uploaded_file($source, $target))
  181. $succeed = true;
  182. elseif (@is_readable($source) &&
  183. (@$fp_s = fopen($source, 'rb')) && (@$fp_t = fopen($target, 'wb')))
  184. {
  185. while (!feof($fp_s))
  186. {
  187. $s = @fread($fp_s, 1024 * 512);
  188. @fwrite($fp_t, $s);
  189. }
  190. fclose($fp_s);
  191. fclose($fp_t);
  192. $succeed = true;
  193. }

  194. if($succeed)

  195. {
  196. $this->error_code = 0;
  197. @chmod($target, 0644);
  198. @unlink($source);
  199. }
  200. else
  201. {
  202. $this->error_code = 0;
  203. }

  204. return $succeed;

  205. }

  206. public function thumb($image,$maxWidth=200,$maxHeight=50,$gen = 0,

  207. $interlace=true,$filepath = '',$is_preview = true)
  208. {
  209. $info = es_imagecls::getImageInfo($image);

  210. if($info !== false)

  211. {
  212. $srcWidth = $info[0];
  213. $srcHeight = $info[1];
  214. $type = $info['type'];

  215. $interlace = $interlace? 1:0;

  216. unset($info);

  217. if($maxWidth > 0 && $maxHeight > 0)

  218. $scale = min($maxWidth/$srcWidth, $maxHeight/$srcHeight);
  219. // 计算缩放比例
  220. elseif($maxWidth == 0)
  221. $scale = $maxHeight/$srcHeight;
  222. elseif($maxHeight == 0)
  223. $scale = $maxWidth/$srcWidth;

  225. $paths = pathinfo($image);
  226. $paths['filename'] = trim(strtolower($paths['basename']),
  227. ".".strtolower($paths['extension']));
  228. $basefilename = explode("_",$paths['filename']);
  229. $basefilename = $basefilename[0];
  230. if(empty($filepath))
  231. {
  232. if($is_preview)
  233. $thumbname = $paths['dirname'].'/'.$basefilename.
  234. '_'.$maxWidth.'x'.$maxHeight.'.jpg';
  235. else
  236. $thumbname = $paths['dirname'].'/'.$basefilename.
  237. 'o_'.$maxWidth.'x'.$maxHeight.'.jpg';
  238. }
  239. else
  240. $thumbname = $filepath;

  241. $thumburl = str_replace(APP_ROOT_PATH,'./',$thumbname);

  243. if($scale >= 1)
  244. {
  245. // 超过原图大小不再缩略
  246. $width = $srcWidth;
  247. $height = $srcHeight;
  248. if(!$is_preview)
  249. {
  250. //非预览模式写入原图
  251. file_put_contents($thumbname,file_get_contents($image)); //用原图写入
  252. return array('url'=>$thumburl,'path'=>$thumbname);
  253. }
  254. }
  255. else
  256. {
  257. // 缩略图尺寸
  258. $width = (int)($srcWidth*$scale);
  259. $height = (int)($srcHeight*$scale);
  260. }
  262. if($gen == 1)
  263. {
  264. $width = $maxWidth;
  265. $height = $maxHeight;
  266. }

  267. // 载入原图

  268. $createFun = 'imagecreatefrom'.($type=='jpg'?'jpeg':$type);
  269. if(!function_exists($createFun))
  270. $createFun = 'imagecreatefromjpeg';

  271. $srcImg = $createFun($image);

  272. //创建缩略图

  273. if($type!='gif' && function_exists('imagecreatetruecolor'))
  274. $thumbImg = imagecreatetruecolor($width, $height);
  275. else
  276. $thumbImg = imagecreate($width, $height);

  277. $x = 0;

  278. $y = 0;

  279. if($gen == 1 && $maxWidth > 0 && $maxHeight > 0)

  280. {
  281. $resize_ratio = $maxWidth/$maxHeight;
  282. $src_ratio = $srcWidth/$srcHeight;
  283. if($src_ratio >= $resize_ratio)
  284. {
  285. $x = ($srcWidth - ($resize_ratio * $srcHeight)) / 2;
  286. $width = ($height * $srcWidth) / $srcHeight;
  287. }
  288. else
  289. {
  290. $y = ($srcHeight - ( (1 / $resize_ratio) * $srcWidth)) / 2;
  291. $height = ($width * $srcHeight) / $srcWidth;
  292. }
  293. }

  294. // 复制图片

  295. if(function_exists("imagecopyresampled"))
  296. imagecopyresampled($thumbImg, $srcImg, 0, 0, $x, $y, $width, $height,
  297. $srcWidth,$srcHeight);
  298. else
  299. imagecopyresized($thumbImg, $srcImg, 0, 0, $x, $y, $width, $height,
  300. $srcWidth,$srcHeight);
  301. if('gif'==$type || 'png'==$type) {
  302. $background_color = imagecolorallocate($thumbImg, 0,255,0); // 指派一个绿色
  303. imagecolortransparent($thumbImg,$background_color);
  304. // 设置为透明色，若注释掉该行则输出绿色的图
  305. }

  306. // 对jpeg图形设置隔行扫描

  307. if('jpg'==$type || 'jpeg'==$type)
  308. imageinterlace($thumbImg,$interlace);

  309. // 生成图片

  310. imagejpeg($thumbImg,$thumbname,100);
  311. imagedestroy($thumbImg);
  312. imagedestroy($srcImg);

  313. return array('url'=>$thumburl,'path'=>$thumbname);

  314. }
  315. return false;
  316. }

  317. public function make_thumb($srcImg,$srcWidth,$srcHeight,$type,$maxWidth=200,

  318. $maxHeight=50,$gen = 0)
  319. {

  320. $interlace = $interlace? 1:0;

  321. if($maxWidth > 0 && $maxHeight > 0)

  322. $scale = min($maxWidth/$srcWidth, $maxHeight/$srcHeight);
  323. // 计算缩放比例
  324. elseif($maxWidth == 0)
  325. $scale = $maxHeight/$srcHeight;
  326. elseif($maxHeight == 0)
  327. $scale = $maxWidth/$srcWidth;

  328. if($scale >= 1)

  329. {
  330. // 超过原图大小不再缩略
  331. $width = $srcWidth;
  332. $height = $srcHeight;
  333. }
  334. else
  335. {
  336. // 缩略图尺寸
  337. $width = (int)($srcWidth*$scale);
  338. $height = (int)($srcHeight*$scale);
  339. }

  340. if($gen == 1)

  341. {
  342. $width = $maxWidth;
  343. $height = $maxHeight;
  344. }

  346. //创建缩略图
  347. if($type!='gif' && function_exists('imagecreatetruecolor'))
  348. $thumbImg = imagecreatetruecolor($width, $height);
  349. else
  350. $thumbImg = imagecreatetruecolor($width, $height);

  351. $x = 0;

  352. $y = 0;

  353. if($gen == 1 && $maxWidth > 0 && $maxHeight > 0)

  354. {
  355. $resize_ratio = $maxWidth/$maxHeight;
  356. $src_ratio = $srcWidth/$srcHeight;
  357. if($src_ratio >= $resize_ratio)
  358. {
  359. $x = ($srcWidth - ($resize_ratio * $srcHeight)) / 2;
  360. $width = ($height * $srcWidth) / $srcHeight;
  361. }
  362. else
  363. {
  364. $y = ($srcHeight - ( (1 / $resize_ratio) * $srcWidth)) / 2;
  365. $height = ($width * $srcHeight) / $srcWidth;
  366. }
  367. }

  368. // Copy image

  369. if(function_exists("imagecopyresampled"))
  370. imagecopyresampled($thumbImg, $srcImg, 0, 0, $x, $y, $width, $height,
  371. $srcWidth,$srcHeight);
  372. else
  373. imagecopyresized($thumbImg, $srcImg, 0, 0, $x, $y, $width, $height,
  374. $srcWidth,$srcHeight);
  375. if('gif'== $type || 'png'==$type) {
  376. $background_color = imagecolorallocate($thumbImg, 255,255,255);
  377. // Assign a green
  378. imagecolortransparent($thumbImg,$background_color);
  379. // Set to transparent color, if Commenting out this line will output a green image
  380. }

  381. // Set interlacing for jpeg graphics

  382. if('jpg'==$type || 'jpeg'==$type)
  383. imageinterlace($thumbImg,$interlace);

  384. return $thumbImg;

  386. }

  388. public function water($source,$water,$alpha= 80,$position="0")
  389. {
  390. //Check if the file exists
  391. if(!file_exists($source)||!file_exists($water))
  392. return false;

  393. //Image information

  394. $sInfo = es_imagecls::getImageInfo($source);
  395. $wInfo = es_imagecls::getImageInfo($water);

  396. //If the image is smaller than the watermark image, it will not be generated Picture

  397. if($sInfo["0"] < $wInfo["0"] || $sInfo['1'] < $wInfo['1'])
  398. return false;

  399. < ;p>
  401. if(is_animated_gif($source))
  402. {
  403. require_once APP_ROOT_PATH."system/utils/gif_encoder.php";
  404. require_once APP_ROOT_PATH."system/utils/gif_reader.php";

  405. < ;p> $gif = new GIFReader();
  406. $gif->load($source);
  407. foreach($gif->IMGS['frames'] as $k=>$img)
  408. {
  409. $ im = imagecreatefromstring($gif->getgif($k));
  410. //Add watermark to im
  411. $sImage=$im;
  412. $wCreateFun="imagecreatefrom".$wInfo['type'];
  413. if(! function_exists($wCreateFun))
  414. $wCreateFun = 'imagecreatefromjpeg';
  415. $wImage=$wCreateFun($water);
  417. //Set the color blending mode of the image
  418. imagealphablending($wImage, true);
  419. switch (intval($ position))
  420. {
  421. case 0: break;
  422. //Top left
  423. case 1:
  424. $posY=0;
  425. $posX=0;
  426. //Generate mixed image
  427. imagecopymerge($sImage, $wImage, $posX, $ posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  428. break;
  429. //upper right
  430. case 2:
  431. $posY=0;
  432. $posX=$sInfo[0]-$ wInfo[0];
  433. //Generate mixed images
  434. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  435. break;
  436. //Bottom left
  437. case 3:
  438. $posY=$sInfo[1]-$wInfo[1];
  439. $posX=0;
  440. //Generate mixed image
  441. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  442. break;
  443. //lower right
  444. case 4:
  445. $posY=$sInfo[1]-$wInfo[1];
  446. $ posX=$sInfo[0]-$wInfo[0];
  447. //Generate mixed images
  448. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1] ,$alpha);
  449. break;
  450. //Centered
  451. case 5:
  452. $posY=$sInfo[1]/2-$wInfo[1]/2;
  453. $posX=$sInfo[0]/2-$wInfo [0]/2;
  454. //Generate mixed images
  455. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  456. break;
  457. }
  458. //end im watermark
  461. ob_start();
  462. imagegif($sImage);
  463. $content = ob_get_contents();
  464. ob_end_clean();
  465. $frames [ ] = $content;
  466. $framed [ ] = $img['frameDelay'];
  467. }
  470. $gif_maker = new GIFEncoder (
  471. $frames,
  472. $framed,
  473. 0,
  474. 2,
  475. 0, 0, 0,
  476. "bin" //bin is binary url is the address
  477. );
  478. $image_rs = $gif_maker->GetAnimation ( );
  480. //If no save file name is given, the default is the original image name
  481. @unlink($source);
  482. //Save the image
  483. file_put_contents($source,$image_rs);
  484. return true;
  485. }
  487. //Create an image
  488. $sCreateFun="imagecreatefrom".$sInfo['type'];
  489. if(!function_exists($sCreateFun))
  490. $sCreateFun = 'imagecreatefromjpeg';
  491. $sImage=$sCreateFun($source) ;

  492. $wCreateFun="imagecreatefrom".$wInfo['type'];

  493. if(!function_exists($wCreateFun))
  494. $wCreateFun = 'imagecreatefromjpeg';
  495. $wImage=$wCreateFun ($water);

  496. //Set the color blending mode of the image

  497. imagealphablending($wImage, true);

  498. switch (intval($position))

  499. {
  500. case 0: break;
  501. //Top left
  502. case 1:
  503. $posY=0;
  504. $posX=0;
  505. //Generate mixed image
  506. imagecopymerge($sImage, $wImage, $posX, $posY, 0 , 0, $wInfo[0],$wInfo[1],$alpha);
  507. break;
  508. //upper right
  509. case 2:
  510. $posY=0;
  511. $posX=$sInfo[0]-$wInfo[0 ];
  512. //Generate mixed image
  513. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  514. break;
  515. //Bottom left
  516. case 3:
  517. $posY=$sInfo[1]-$wInfo[1];
  518. $posX=0;
  519. //Generate mixed image
  520. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0 , $wInfo[0],$wInfo[1],$alpha);
  521. break;
  522. //lower right
  523. case 4:
  524. $posY=$sInfo[1]-$wInfo[1];
  525. $posX=$ sInfo[0]-$wInfo[0];
  526. //Generate mixed images
  527. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha );
  528. break;
  529. //Centered
  530. case 5:
  531. $posY=$sInfo[1]/2-$wInfo[1]/2;
  532. $posX=$sInfo[0]/2-$wInfo[0] /2;
  533. //Generate mixed images
  534. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  535. break;
  536. }< ;/p>

  537. //If no save file name is given, the default is the original image name

  538. @unlink($source);
  539. //Save the image
  540. imagejpeg($sImage,$source,100);
  541. imagedestroy($sImage);
  542. }
  543. }

  544. if(!function_exists('image_type_to_extension'))

  545. {
  546. function image_type_to_extension($imagetype)
  547. {
  548. if(empty($imagetype))
  549. return false;

  550. switch($imagetype)

  551. {
  552. case IMAGETYPE_GIF : return '.gif';
  553. case IMAGETYPE_JPEG : return '.jpeg';
  554. case IMAGETYPE_PNG : return '.png' ;
  555. case IMAGETYPE_SWF : return '.swf';
  556. case IMAGETYPE_PSD : return '.psd';
  557. case IMAGETYPE_BMP : return '.bmp';
  558. case IMAGETYPE_TIFF_II : return '.tiff';
  559. case IMAGETYPE_TIFF_MM : return '.tiff' ;
  560. case IMAGETYPE_JPC : return '.jpc';
  561. case IMAGETYPE_JP2 : return '.jp2';
  562. case IMAGETYPE_JPX : return '.jpf';
  563. case IMAGETYPE_JB2 : return '.jb2';
  564. case IMAGETYPE_SWC : return '.swc' ;
  565. case IMAGETYPE_IFF : return '.aiff';
  566. case IMAGETYPE_WBMP : return '.wbmp';
  567. case IMAGETYPE_XBM : return '.xbm';
  568. default : return false;
  569. }
  570. }
  571. }
  572. ?>
Copy code

2.get_spec_img() calls the picture class, and then uses the following method to save pictures of different specifications and return the picture connection

  2. //Get the image address of the corresponding specifications
  3. //gen=0: Keep the proportional scaling and do not clip. If the height is 0, the width is guaranteed to be scaled gen=1: The length is guaranteed Width, clipping
  4. function get_spec_image($img_path,$width=0,$height=0,$gen=0,$is_preview=true)
  5. {
  6. if($width==0)
  7. $new_path = $img_path;
  8. else
  9. {
  10. $img_name = substr($img_path,0,-4);
  11. $img_ext = substr($img_path,-3);
  12. if($is_preview)
  13. $new_path = $img_name."_".$width. "x".$height.".jpg";
  14. else
  15. $new_path = $img_name."o_".$width."x".$height.".jpg";
  16. if(!file_exists($new_path))
  17. {
  18. require_once "imagecls.php";
  19. $imagec = new imagecls();
  20. $thumb = $imagec->thumb($img_path,$width,$height,$gen,true,"
  21. ",$is_preview );
  23. if(app_conf("PUBLIC_DOMAIN_ROOT")!='')
  24. {
  25. $paths = pathinfo($new_path);
  26. $path = str_replace("./","",$paths['dirname'] );
  27. $filename = $paths['basename'];
  28. $pathwithoupublic = str_replace("public/","",$path);
  30. $file_data = @file_get_contents($path.$file);
  31. 　 $img = @imagecreatefromstring($file_data);
  32. 　 if($img!==false)
  33. 　);
  34. 3. How to use:
  40. //im: Save store images in 3 specifications: small image: 48x48, medium image 120x120, large image 200x200
  41. $small_url=get_spec_image($data['image'],48,48,0 );
  42. $
  43. middle_url=get_spec_image($data['image'], 120,120,0);
  44. $big_url=get_spec_image($data['image'],200,200,0);
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将图片保存为不同规格的图片的php代码
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