缩略图的生成
1 //生成缩略图 2 public function wgetimg($topath, $w, $h, $url, $picname, $type) { 3 $sRealPath = realpath('./'); 4 $sSelfPath = $_SERVER['PHP_SELF']; 5 $sSelfPath = substr($sSelfPath, 0, strrpos($sSelfPath, '/')); 6 $sSelfPath = substr($sRealPath, 0, strlen($sRealPath) - strlen($sSelfPath)); 7 8 $topath = $sSelfPath.$topath; 9 include_once('./apps/index/Lib/Action/imgAction.class.php'); 10 $type = strtolower($type); 11 if (!file_exists($topath . $picname . '.' . $type)) { 12 //exec("wget -c -t 100 -T 60 -O ".$topath.$picname.'.'.$type." ".$url); 13 exec("wget -c -t 3 -T 60 -O " . $topath . $picname . '.' . $type . " " . $url); 14 } 15 16 if (!file_exists($topath . '(' . $w . 'x' . $h . ')_' . $picname . '.' . $type) && file_exists($topath . $picname . '.' . $type)) { 17 /* 生成图片 */ 18 $arrayName = array( 19 'path' => $topath . $picname . '.' . $type, 20 'name' => '(' . $w . 'x' . $h . ')_' . $picname, 21 'type' => $type, 22 'topath' => $topath, 23 'scale' => true, 24 'tow' => $w, 25 'toh' => $h, 26 'poi' => 1, 27 'strict' => false 28 ); 29 $a = new imgAction($arrayName); 30 } 31 //return $arrayName['name'].$arrayName['type']; 32 }
调用：
第一个参数：缩略图要存放的目录，后面两个参数是缩略图的大小。$img1:是要被缩略的原图地址；$picname是缩略图的名称，不含后缀。$type是图片的类型即后缀.
$this->wgetimg('/data/Uploads/ad/', 318, 395, $img1, $picname, $type);
imgAction.class.php:
1 <?php 2 /* 3 图片处理类 4 输入参数 $imgInfo array 5 ['raww'] int 原始图片宽度 6 ['rawh'] int 原始图片高度 7 ['rawtype'] string 图片类型 8 ['rawext'] 图片后缀 9 ['rsize'] 原图大小 10 ['dirname'] 图片与后缀的分割符 11 ['tmpimg'] 初始化后的图片 12 13 *['scale'] = true/flase 14 true 设置固定尺寸，不够大放大，太大缩小 15 flase 按比例缩放 16 true 按框高等比缩放 17 ['tow'] int 缩放的宽 px 18 ['toh'] int 缩放的高 px 19 20 ['poi'] int 21 0 坐标0 截取保留上部分 22 1 截取保留中间部分 23 2 截取保留下面部分 24 25 ['name'] string 空使用原来的名字 26 ['type'] = string 空保留原来的图片类型 27 28 *['path'] string 图片来路 29 *['topath'] sring 保存的路径 30 ['strict'] 是否严格较验图片类型 ， 类型与后缀需相同 默认为 true 31 32 ['show'] = true/false 33 true 直接输出图片 34 35 ['quality'] int 60-100 图片质量 36 37 ['watermark'] array 38 ---['type'] text 文字水印 img 图片水印 39 ---['path'] string 来路 40 ---['forcing'] = true/false 41 true 强制水印，不管图片高宽 42 ---['poi'] int 水印位置，从左到右 43 0 1 2 44 3 4 5 45 6 7 8 46 9 9为随机 47 48 ['goimg'] array 内容生成图片 49 ---['content'] string 内容 50 ---['font'] string 字体 51 ---['size'] int 字号 52 ---['bold'] = true/false 53 true 加粗 54 ['msg'] = true/flase 55 true 只返回成功失败信息 56 57 输出参数 imgInfo array 58 'path' => string 'teJkZsyiFzngfNDeKU.jpg' (length=22) 59 'name' => string 'aa' (length=2) 60 'type' => string 'jpg' (length=3) 61 'topath' => string 'D:\svn\tmp\test/' (length=16) 62 'fiexd' => boolean true 63 'tow' => int 160 64 'toh' => int 40 65 'poi' => int 1 66 'raww' => int 533 67 'rawh' => int 800 68 'rawtype' => string 'jpg' (length=3) 69 'rawext' => string 'jpg' (length=3) 70 'dirname' => string '.' (length=1) 71 'tmpimg' => resource(4, gd) 72 'time' => int 1358504732 73 'w' => float 160 74 'h' => float 240.15009380863 75 'msg' => int 1 76 77 PS： 按比例缩小只需写宽或高，缩放时按大的尺寸缩放 如 宽 0 高 10 则按高度10缩放 78 79 */ 80 81 class imgAction{ 82 public function __construct($imgInfo){ 83 !is_array($imgInfo)? exit('not array'):''; 84 85 $this->imgInfo = $imgInfo; 86 if (!$this->exists($this->imgInfo['path'])){ 87 return false; 88 } 89 90 $imagesize = $this->getimagesize($this->imgInfo['path'],$this->imgInfo['strict']); 91 if (!$imagesize){ 92 return false; 93 } 94 $this->imgInfo['raww'] = $imagesize['0']; 95 $this->imgInfo['rawh'] = $imagesize['1']; 96 $this->imgInfo['rawtype'] = $imagesize['type']; 97 $this->imgInfo['rawext'] = $imagesize['extension']; 98 $this->imgInfo['name'] = isset($imgInfo['name']) ? $imgInfo['name'] : $imagesize['filename']; 99 $this->imgInfo['type'] = isset($imgInfo['type']) ? $imgInfo['type'] : $imagesize['type']; 100 $this->imgInfo['dirname'] = $imagesize['dirname']; 101 $this->imgInfo['tmpimg'] = $imagesize['tmpimg']; 102 $this->pyresizepic(); 103 } 104 /* 105 图片处理缩略 106 */ 107 private function pyresizepic(){ 108 $ratio = $this->ratio($this->imgInfo); 109 $this->imgInfo['w'] = $ratio['w']; 110 $this->imgInfo['h'] = $ratio['h']; 111 if ($this->imgInfo['scale']){ 112 $this->fiexd($ratio); 113 }else{ 114 $this->scale($ratio); 115 } 116 117 } 118 /*固定大小的缩放*/ 119 private function fiexd($ratio){ 120 $newimg = imagecreatetruecolor($this->imgInfo['tow'],$this->imgInfo['toh']); 121 imagecopyresampled($newimg,$this->imgInfo['tmpimg'], 0, 0, $ratio['x'], $ratio['y'], $ratio['w'],$ratio['h'], $this->imgInfo['raww'], $this->imgInfo['rawh']); 122 $this->printpic($newimg); 123 } 124 /*按比例的缩放*/ 125 private function scale($ratio){ 126 $newimg = imagecreatetruecolor($ratio['w'],$ratio['h']); 127 imagecopyresampled($newimg,$this->imgInfo['tmpimg'], 0, 0, 0, 0, $ratio['w'],$ratio['h'], $this->imgInfo['raww'], $this->imgInfo['rawh']); 128 $this->printpic($newimg); 129 } 130 /*将bmp改成jpg*/ 131 private function bmp($im,$path,$w,$h){ 132 $newimg = imagecreatetruecolor($w,$h); 133 imagecopyresampled($newimg,$im, 0, 0, 0, 0, $w,$h, $w,$h); 134 imagejpeg($newimg,$path,100); 135 } 136 137 /*生成图片*/ 138 private function printpic($newimg){ 139 if (!$this->exists($this->imgInfo['topath'])){ 140 if (!mkdir($this->imgInfo['topath'],777)){ 141 $this->text($this->imgInfo['topath']); 142 } 143 } 144 ImageInterlace($newimg,1); 145 switch ($this->imgInfo['type']) { 146 case 'gif': 147 imagegif($newimg,$this->imgInfo['topath'].$this->imgInfo['name'].'.'.$this->imgInfo['type']); 148 break; 149 case 'jpg': 150 case 'jpeg': 151 imagejpeg($newimg,$this->imgInfo['topath'].$this->imgInfo['name'].'.'.$this->imgInfo['type']); 152 break; 153 case 'png': 154 imagepng($newimg,$this->imgInfo['topath'].$this->imgInfo['name'].'.'.$this->imgInfo['type']); 155 break; 156 case 'bmp': 157 imagejpeg($newimg,$this->imgInfo['topath'].$this->imgInfo['name'].'.'.$this->imgInfo['type']); 158 break; 159 default: 160 $this->text($this->imgInfo['topath']); 161 break; 162 } 163 $this->imgInfo['time'] = time(); 164 $this->imgInfo['msg'] = 1 ; 165 //return $this->imgInfo; 166 //$this->text($this->imgInfo); 167 } 168 169 /*计算缩放比例*/ 170 private function ratio(){ 171 $ratio = ($this->imgInfo['raww'] >= $this->imgInfo['rawh']) ? $this->imgInfo['toh']/$this->imgInfo['rawh'] : $this->imgInfo['tow']/$this->imgInfo['raww']; 172 173 $p = 0.3132530120481928; //坐标偏移，截取中间时，某些尺寸会出错，需设置便宜值 174 175 $scrWH['w'] = $this->imgInfo['raww']*$ratio; 176 $scrWH['h'] = $this->imgInfo['rawh']*$ratio; 177 178 if ($scrWH['w'] < $this->imgInfo['tow'] || $scrWH['h'] < $this->imgInfo['toh']){ 179 $ratio = ($this->imgInfo['raww'] >= $this->imgInfo['rawh']) ? $this->imgInfo['tow']/$this->imgInfo['raww'] : $this->imgInfo['toh']/$this->imgInfo['rawh']; 180 if ($scrWH['w'] < $this->imgInfo['tow'] ){ 181 $scrWH['w'] = $this->imgInfo['tow']; 182 $scrWH['h'] = $this->imgInfo['rawh']*$ratio; 183 } 184 if ($scrWH['w'] < $this->imgInfo['tow'] ){ 185 $scrWH['w'] = $this->imgInfo['raww']*$ratio; 186 $scrWH['h'] = $this->imgInfo['rawh']; 187 } 188 } 189 190 191 if ($this->imgInfo['poi'] == 1){ 192 193 $scrWH['x'] = ($scrWH['w'] > $this->imgInfo['tow']) ? ($scrWH['w'] - $this->imgInfo['tow'])/2 : 0; 194 $scrWH['y'] = ($scrWH['h'] > $this->imgInfo['toh']) ? ($scrWH['h'] - $this->imgInfo['toh'])/2 : 0; 195 $scrWH['x'] = $scrWH['x']*$p ; 196 $scrWH['y'] = $scrWH['y']*$p ; 197 198 }elseif ($this->imgInfo['poi'] == 2){ 199 $scrWH['x']=0; 200 $scrWH['y'] = ($scrWH['h'] > $this->imgInfo['toh']) ?$scrWH['h']-$this->imgInfo['toh'] : 0; 201 }else{ 202 $scrWH['x']=0; 203 $scrWH['y']=0; 204 } 205 return $scrWH; 206 } 207 /* 208 1 为 GIF 格式、 2 为 JPEG/JPG 格式、3 为 PNG 209 */ 210 private function getimagesize($string,$strict){ 211 $_getimagesize = getimagesize($string); 212 $inarray = array('jpg','png','gif','bmp'); 213 switch ($_getimagesize[2]) { 214 case 1: 215 $type = 'gif'; 216 break; 217 case 2: 218 $type = 'jpg'; 219 break; 220 case 3: 221 $type = 'png'; 222 break; 223 case 6: 224 $type = 'bmp'; 225 break; 226 default: 227 $this->text($_getimagesize[2]); 228 break; 229 } 230 switch ($_getimagesize['mime']) { 231 case 'image/png': 232 $mine = 'png'; 233 break; 234 case 'image/jpeg': 235 $mine = 'jpg'; 236 break; 237 case 'image/gif': 238 $mine = 'gif'; 239 break; 240 case 'image/x-ms-bmp': 241 $mine = 'bmp'; 242 break; 243 default: 244 $this->text($_getimagesize['mime']); 245 break; 246 } 247 248 249 $pathinfo = $this->pathinfo($string); 250 251 252 253 if ($mine == 'bmp'){ 254 rename (dirname(__FILE__).'/'.$pathinfo['dirname'].'/'.$pathinfo['basename'],dirname(__FILE__).'/'.$pathinfo['dirname'].'/'.$pathinfo['filename'].'.'.$mine) ; 255 $string = $pathinfo['dirname'].'/'.$pathinfo['filename'].'.'.$mine; 256 $pathinfo = $this->pathinfo($string); 257 } 258 259 if ($strict){ 260 /*严格校验*/ 261 $type = $type != $mine ? false :$type; 262 $type = $type != $pathinfo['extension'] ? false :$type; 263 $type = $mine != $pathinfo['extension'] ? false :$type; 264 265 if (!$type){ 266 return false; 267 } 268 269 }else{ 270 /*宽松较验*/ 271 if (!in_array($type,$inarray) || !in_array($mine,$inarray) || !in_array($pathinfo['extension'],$inarray)){ 272 return false; 273 } 274 } 275 276 $_getimagesize['type'] = $pathinfo['extension']; 277 $_getimagesize['dirname'] = $pathinfo['dirname']; 278 $_getimagesize['filename'] = $pathinfo['filename']; 279 $_getimagesize['extension'] = $pathinfo['extension']; 280 281 switch ($type) { 282 case 'gif': 283 $_getimagesize['tmpimg'] = imagecreatefromgif($string); 284 break; 285 case 'jpg': 286 $_getimagesize['tmpimg'] = imagecreatefromjpeg($string); 287 break; 288 case 'png': 289 $_getimagesize['tmpimg'] = imagecreatefrompng($string); 290 break; 291 case 'bmp': 292 $_getimagesize['tmpimg'] = $this->imagecreatefrombmp($string); 293 break; 294 default: 295 $this->text($type); 296 break; 297 } 298 if ($type == 'bmp'){ 299 imagejpeg($_getimagesize['tmpimg'], $_getimagesize['dirname'].'/'.$_getimagesize['filename'].'.jpg'); 300 unlink($_getimagesize['dirname'].'/'.$_getimagesize['filename'].'.'.$_getimagesize['extension']); 301 $_getimagesize['extension'] = 'jpg'; 302 $_getimagesize['tmpimg'] = imagecreatefromjpeg($_getimagesize['dirname'].'/'.$_getimagesize['filename'].'.'.$_getimagesize['extension']); 303 } 304 return $_getimagesize; 305 } 306 /* 307 文件名字信息 308 */ 309 private function pathinfo($string) 310 { 311 $extend = pathinfo($string); 312 $extend['extension'] = strtolower($extend['extension']); 313 if ($extend['extension'] == 'jpeg') $extend['extension'] = 'jpg'; 314 return $extend; 315 } 316 /* 317 文件存在 318 */ 319 private function exists($string){ 320 if (!file_exists($string)){ 321 return false; 322 } 323 return true; 324 } 325 /*test 用，可以保存未知文件的LOG信息*/ 326 private function text($str){ 327 return false; 328 //var_dump($str); 329 //exit; 330 } 331 private function imagecreatefrombmp($string){ 332 $tmp_name = tempnam("tmp", "GD"); 333 if($this->ConvertBMP2GD($string, $tmp_name)) { 334 $img = imagecreatefromgd($tmp_name); 335 unlink($tmp_name); 336 return $img; 337 } 338 return false; 339 } 340 /* 处理PNG 图片*/ 341 private function ConvertBMP2GD($src, $dest = false) { 342 if(!($src_f = fopen($src, "rb"))) { 343 return false; 344 } 345 if(!($dest_f = fopen($dest, "wb"))) { 346 return false; 347 } 348 $header = unpack("vtype/Vsize/v2reserved/Voffset", fread($src_f, 14)); 349 $info = unpack("Vsize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyres/Vncolor/Vimportant", fread($src_f, 40)); 350 extract($info); 351 extract($header); 352 if($type != 0x4D42) { // signature "BM" 353 return false; 354 } 355 $palette_size = $offset - 54; 356 $ncolor = $palette_size / 4; 357 $gd_header = ""; 358 // true-color vs. palette 359 $gd_header .= ($palette_size == 0) ? "\xFF\xFE" : "\xFF\xFF"; 360 $gd_header .= pack("n2", $width, $height); 361 $gd_header .= ($palette_size == 0) ? "\x01" : "\x00"; 362 if($palette_size) { 363 $gd_header .= pack("n", $ncolor); 364 } 365 // no transparency 366 $gd_header .= "\xFF\xFF\xFF\xFF"; 367 fwrite($dest_f, $gd_header); 368 if($palette_size) { 369 $palette = fread($src_f, $palette_size); 370 $gd_palette = ""; 371 $j = 0; 372 while($j < $palette_size) { 373 $b = $palette{$j++}; 374 $g = $palette{$j++}; 375 $r = $palette{$j++}; 376 $a = $palette{$j++}; 377 $gd_palette .= "$r$g$b$a"; 378 } 379 $gd_palette .= str_repeat("\x00\x00\x00\x00", 256 - $ncolor); 380 fwrite($dest_f, $gd_palette); 381 } 382 $scan_line_size = (($bits * $width) + 7) >> 3; 383 $scan_line_align = ($scan_line_size & 0x03) ? 4 - ($scan_line_size & 0x03) : 0; 384 for($i = 0, $l = $height - 1; $i < $height; $i++, $l--) { 385 // BMP stores scan lines starting from bottom 386 fseek($src_f, $offset + (($scan_line_size + $scan_line_align) * $l)); 387 $scan_line = fread($src_f, $scan_line_size); 388 if($bits == 24) { 389 $gd_scan_line = ""; 390 $j = 0; 391 while($j < $scan_line_size) { 392 $b = $scan_line{$j++}; 393 $g = $scan_line{$j++}; 394 $r = $scan_line{$j++}; 395 $gd_scan_line .= "\x00$r$g$b"; 396 } 397 } 398 else if($bits == 8) { 399 $gd_scan_line = $scan_line; 400 } 401 else if($bits == 4) { 402 $gd_scan_line = ""; 403 $j = 0; 404 while($j < $scan_line_size) { 405 $byte = ord($scan_line{$j++}); 406 $p1 = chr($byte >> 4); 407 $p2 = chr($byte & 0x0F); 408 $gd_scan_line .= "$p1$p2"; 409 } 410 $gd_scan_line = substr($gd_scan_line, 0, $width); 411 } 412 else if($bits == 1) { 413 $gd_scan_line = ""; 414 $j = 0; 415 while($j < $scan_line_size) { 416 $byte = ord($scan_line{$j++}); 417 $p1 = chr((int) (($byte & 0x80) != 0)); 418 $p2 = chr((int) (($byte & 0x40) != 0)); 419 $p3 = chr((int) (($byte & 0x20) != 0)); 420 $p4 = chr((int) (($byte & 0x10) != 0)); 421 $p5 = chr((int) (($byte & 0x08) != 0)); 422 $p6 = chr((int) (($byte & 0x04) != 0)); 423 $p7 = chr((int) (($byte & 0x02) != 0)); 424 $p8 = chr((int) (($byte & 0x01) != 0)); 425 $gd_scan_line .= "$p1$p2$p3$p4$p5$p6$p7$p8"; 426 } 427 $gd_scan_line = substr($gd_scan_line, 0, $width); 428 } 429 fwrite($dest_f, $gd_scan_line); 430 } 431 fclose($src_f); 432 fclose($dest_f); 433 return true; 434 } 435 } 436 /* 437 $arrayName = array( 438 'path' => '0a9eaff4-b692-49df-95ba-e32c108be4d7.jpg', 439 'name' => 'aa', 440 'type' => 'jpg', 441 'topath' => dirname(__FILE__).'/', 442 'scale' => true, 443 'tow' => 140, 444 'toh' => 140, 445 'poi' => 1, 446 'strict' => false 447 ); 448 $a = new imgAction($arrayName); 449 */ 450 ?>
