欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识！
您现在的位置是： 首页  >  后端开发

将图片保存为不同规格的图片的php代码

程序员文章站 2022-05-22 20:33:22
...

  3. /**

  4. 图片处理类
  5. */
  6. class imagecls
  7. {
  8. /**
  9. * 文件信息
  10. */
  11. var $file = array();
  12. /**
  13. * 保存目录
  14. */
  15. var $dir = '';
  16. /**
  17. * 错误代码
  18. */
  19. var $error_code = 0;
  20. /**
  21. * 文件上传最大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. * 处理上传文件
  35. * @param array $file 上传的文件
  36. * @param string $dir 保存的目录
  37. * @return bool
  38. */
  39. function init($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. * 保存文件
  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. * 获取错误代码
  93. * @return number
  94. */
  95. function error()
  96. {
  97. return $this->error_code;
  98. }

  99. /**

  100. * 获取文件扩展名
  101. * @return string
  102. */
  103. function fileExt($file_name)
  104. {
  105. return addslashes(strtolower(substr(strrchr($file_name, '.'), 1, 10)));
  106. }

  107. /**

  108. * 根据扩展名判断文件是否为图像
  109. * @param string $ext 扩展名
  110. * @return bool
  111. */
  112. function isImageExt($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. * 获取图像信息
  119. * @param string $target 文件路径
  120. * @return mixed
  121. */
  122. function getImageInfo($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. * 获取是否充许上传文件
  146. * @param string $source 文件路径
  147. * @return bool
  148. */
  149. function isUploadFile($source)
  150. {
  151. return $source && ($source != 'none') &&
  152. (is_uploaded_file($source) || is_uploaded_file(str_replace('\\', '\', $source)));
  153. }

  154. /**

  155. * 获取保存的路径
  156. * @param string $dir 指定的保存目录
  157. * @return string
  158. */
  159. function getTargetDir($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. * 保存文件
  169. * @param string $source 源文件路径
  170. * @param string $target 目录文件路径
  171. * @return bool
  172. */
  173. private function saveFile($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. // 复制图片

  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. // 指派一个绿色
  378. imagecolortransparent($thumbImg,$background_color);
  379. // 设置为透明色，若注释掉该行则输出绿色的图
  380. }

  381. // 对jpeg图形设置隔行扫描

  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. //检查文件是否存在
  391. if(!file_exists($source)||!file_exists($water))
  392. return false;

  393. //图片信息

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

  396. //如果图片小于水印图片，不生成图片

  397. if($sInfo["0"] return false;

  400. if(is_animated_gif($source))
  401. {
  402. require_once APP_ROOT_PATH."system/utils/gif_encoder.php";
  403. require_once APP_ROOT_PATH."system/utils/gif_reader.php";

  404. $gif = new GIFReader();

  405. $gif->load($source);
  406. foreach($gif->IMGS['frames'] as $k=>$img)
  407. {
  408. $im = imagecreatefromstring($gif->getgif($k));
  409. //为im加水印
  410. $sImage=$im;
  411. $wCreateFun="imagecreatefrom".$wInfo['type'];
  412. if(!function_exists($wCreateFun))
  413. $wCreateFun = 'imagecreatefromjpeg';
  414. $wImage=$wCreateFun($water);
  416. //设定图像的混色模式
  417. imagealphablending($wImage, true);
  418. switch (intval($position))
  419. {
  420. case 0: break;
  421. //左上
  422. case 1:
  423. $posY=0;
  424. $posX=0;
  425. //生成混合图像
  426. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  427. break;
  428. //右上
  429. case 2:
  430. $posY=0;
  431. $posX=$sInfo[0]-$wInfo[0];
  432. //生成混合图像
  433. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  434. break;
  435. //左下
  436. case 3:
  437. $posY=$sInfo[1]-$wInfo[1];
  438. $posX=0;
  439. //生成混合图像
  440. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  441. break;
  442. //右下
  443. case 4:
  444. $posY=$sInfo[1]-$wInfo[1];
  445. $posX=$sInfo[0]-$wInfo[0];
  446. //生成混合图像
  447. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  448. break;
  449. //居中
  450. case 5:
  451. $posY=$sInfo[1]/2-$wInfo[1]/2;
  452. $posX=$sInfo[0]/2-$wInfo[0]/2;
  453. //生成混合图像
  454. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  455. break;
  456. }
  457. //end im加水印
  460. ob_start();
  461. imagegif($sImage);
  462. $content = ob_get_contents();
  463. ob_end_clean();
  464. $frames [ ] = $content;
  465. $framed [ ] = $img['frameDelay'];
  466. }
  469. $gif_maker = new GIFEncoder (
  470. $frames,
  471. $framed,
  472. 0,
  473. 2,
  474. 0, 0, 0,
  475. "bin" //bin为二进制 url为地址
  476. );
  477. $image_rs = $gif_maker->GetAnimation ( );
  479. //如果没有给出保存文件名，默认为原图像名
  480. @unlink($source);
  481. //保存图像
  482. file_put_contents($source,$image_rs);
  483. return true;
  484. }
  486. //建立图像
  487. $sCreateFun="imagecreatefrom".$sInfo['type'];
  488. if(!function_exists($sCreateFun))
  489. $sCreateFun = 'imagecreatefromjpeg';
  490. $sImage=$sCreateFun($source);

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

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

  495. //设定图像的混色模式

  496. imagealphablending($wImage, true);

  497. switch (intval($position))

  498. {
  499. case 0: break;
  500. //左上
  501. case 1:
  502. $posY=0;
  503. $posX=0;
  504. //生成混合图像
  505. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  506. break;
  507. //右上
  508. case 2:
  509. $posY=0;
  510. $posX=$sInfo[0]-$wInfo[0];
  511. //生成混合图像
  512. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  513. break;
  514. //左下
  515. case 3:
  516. $posY=$sInfo[1]-$wInfo[1];
  517. $posX=0;
  518. //生成混合图像
  519. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  520. break;
  521. //右下
  522. case 4:
  523. $posY=$sInfo[1]-$wInfo[1];
  524. $posX=$sInfo[0]-$wInfo[0];
  525. //生成混合图像
  526. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  527. break;
  528. //居中
  529. case 5:
  530. $posY=$sInfo[1]/2-$wInfo[1]/2;
  531. $posX=$sInfo[0]/2-$wInfo[0]/2;
  532. //生成混合图像
  533. imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
  534. break;
  535. }

  536. //如果没有给出保存文件名，默认为原图像名

  537. @unlink($source);
  538. //保存图像
  539. imagejpeg($sImage,$source,100);
  540. imagedestroy($sImage);
  541. }
  542. }

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

  544. {
  545. function image_type_to_extension($imagetype)
  546. {
  547. if(empty($imagetype))
  548. return false;

  549. switch($imagetype)

  550. {
  551. case IMAGETYPE_GIF : return '.gif';
  552. case IMAGETYPE_JPEG : return '.jpeg';
  553. case IMAGETYPE_PNG : return '.png';
  554. case IMAGETYPE_SWF : return '.swf';
  555. case IMAGETYPE_PSD : return '.psd';
  556. case IMAGETYPE_BMP : return '.bmp';
  557. case IMAGETYPE_TIFF_II : return '.tiff';
  558. case IMAGETYPE_TIFF_MM : return '.tiff';
  559. case IMAGETYPE_JPC : return '.jpc';
  560. case IMAGETYPE_JP2 : return '.jp2';
  561. case IMAGETYPE_JPX : return '.jpf';
  562. case IMAGETYPE_JB2 : return '.jb2';
  563. case IMAGETYPE_SWC : return '.swc';
  564. case IMAGETYPE_IFF : return '.aiff';
  565. case IMAGETYPE_WBMP : return '.wbmp';
  566. case IMAGETYPE_XBM : return '.xbm';
  567. default : return false;
  568. }
  569. }
  570. }
  571. ?>
复制代码

2.get_spec_img()调用图片类,然后再用下面的方法保存不同规格的图片并返回图片连接

  2. //获取相应规格的图片地址
  3. //gen=0:保持比例缩放，不剪裁,如高为0，则保证宽度按比例缩放 gen=1：保证长宽，剪裁
  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. 　 　 　 $save_path = "public/".$path;
  35. 　 　 　 if(!is_dir($save_path))
  36. 　 　 　 {
  37. 　 　 　 　 @mk_dir($save_path);　 　 　
  38. 　 　 　 }
  39. 　 　 　 @file_put_contents($save_path.$name,$file_data);
  40. 　 　 }
  41. }
  43. }
  44. }
  45. return $new_path;
  46. }
复制代码

3.使用方法:

  2. //im:将店铺图片保存为3种规格:小图:48x48,中图120x120,大图200x200
  3. $small_url=get_spec_image($data['image'],48,48,0);
  4. $
  5. middle_url
    6. =get_spec_image($data['image'],120,120,0);
  6. $big_url=get_spec_image($data['image'],200,200,0);
复制代码
相关标签： 将图片保存为不同规格的图片的php代码

上一篇： windows下配置apache+php+mysql时出现问题的处理方法_php技巧

下一篇： PHP半路出家(1)

推荐阅读