php上傳檔案並產生縮圖的函數

php 上傳檔案並產生縮圖的代碼，分為單檔案與多檔案上傳，並可以產生縮圖，確實不錯，建議大家參考學習下。 完整代碼如下。 * ******************************************************/function UpLoadFileAll($input='UpPic', $path='upload', $ftype='jpg,gif,png', $fsize=2){$fileInfo = $_FILES[$input]; //檔案資訊if(strrpos($path, '/') < strlen($path)-1) $path .= '/'; //上傳檔案夾.$myfile = CreatMyFile($path); //建立檔案夾if($myfile==false) return false;$Atype = explode(',', $ftype); //檔案類型.$fsize = $fsize*1048576; //(1024*1024==1048576=1M)限檔案大小，按位元組. $js = "以下檔案上傳成功：\\n\\n";if(is_array($fileInfo["error"])){ foreach ($fileInfo["error"] as $key => $error){ if ($error == 0) { $name = $fileInfo["name"][$key]; //用戶端機器檔案的原名稱. $size = $fileInfo["size"][$key]; //上傳檔案的大小，單位為位元組. $type = $fileInfo["type"][$key]; //上傳檔案類型. $tmp_name = $fileInfo["tmp_name"][$key]; //檔案被上傳後在服務端儲存的臨時檔案名稱. $type = MyFileType($type); //檢測上傳檔案類型. $path = $myfile.MakeFname($type); //檔案路徑包括檔案名稱. if(in_array($type, $Atype) && $size<=$fsize){ if(@move_uploaded_file($tmp_name, $path)){ $array[] = $path; $js .= " ".$name." 上傳成功 ！\\n"; } } } }}echo "";return $array;}/****************************************************************************** 重設圖片尺寸大小:ResizeImage(原圖片路徑,縮圖(最大)寬度,縮圖(最大)高度)* 傳回值: * 失敗返回: FLASH.* 成功返回：縮圖路徑.*****************************************************************************/function ResizeImage($path, $maxwidth, $maxheight){$picS = substr($path, -3);$name = substr($path, 0, strrpos($path, '.')).'_S';switch($picS){case 'jpg': $im = @imagecreatefromjpeg($path); break;case 'gif': $im = @imagecreatefromgif($path); break;default: $im = @imagecreatefrompng($path);}$width = imagesx($im); $height = imagesy($im); if(($maxwidth && $width > $maxwidth) || ($maxheight && $height > $maxheight)){ if($maxwidth && $width > $maxwidth){ $widthratio = $maxwidth/$width; $RESIZEWIDTH=true; }//end if if($maxheight && $height > $maxheight){ $heightratio = $maxheight/$height; $RESIZEHEIGHT=true; }//end if if($RESIZEWIDTH && $RESIZEHEIGHT){ if($widthratio < $heightratio){ $ratio = $widthratio; }else{ $ratio = $heightratio; } }elseif($RESIZEWIDTH){ $ratio = $widthratio; }elseif($RESIZEHEIGHT){ $ratio = $heightratio; }//end if $newwidth = $width * $ratio; $newheight = $height * $ratio; if(function_exists("imagecopyresampled")){ $newim = imagecreatetruecolor($newwidth, $newheight); imagecopyresampled($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); }else{ $newim = imagecreate($newwidth, $newheight); imagecopyresized($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); }//end if}else{ $newim = $im;}//end if switch($picS){ case 'jpg': $PicPath = $name.".jpg"; if(imagejpeg($newim, $PicPath)){ imagedestroy($newim); return str_replace(array('../','./'), '', $PicPath); }else{ return false; } break; case 'gif': $PicPath = $name.".gif"; if(imagegif($newim, $PicPath)){ imagedestroy($newim); return str_replace(array('../','./'), '', $PicPath); }else{ return false; } break; default: $PicPath = $name.".png"; if(imagepng($newim, $PicPath)){ imagedestroy($newim); return str_replace(array('../','./'), '', $PicPath); }else{ return false; } }//end switch}//end function/*************************** 檔案屬性 $type = 檔案屬性***************************/function MyFileType($type) { $type = strtolower($type);switch($type) { //OFFICE case 'application/msword' : $type = 'doc'; break; case 'application/vnd.ms-excel': $type = 'xls'; break; case 'application/vnd.ms-powerpoint': $type = 'ppt'; break; //壓縮 case 'application/octet-stream': $type = 'rar'; break; //文本 case 'text/plain': $type = 'txt'; break; //圖片 case 'image/pjpeg': $type = 'jpg'; break; case 'image/gif': $type = 'gif'; break; case 'image/x-png': $type = 'png'; break; case 'image/bmp': $type = 'bmp'; break; default : $type = 'err';}return $type; //返迴文件類型.}/******************* 建立檔案夾(路徑)*******************/function CreatMyFile($fname=''){switch($fname){ case '': break; default: if(strrpos($fname, '/') < strlen($fname)-1) $fname .= '/';}$fname .= date("Y-m");if(is_dir($fname)) return $fname.'/'; if(mkdir($fname, 0755)==false) return false;//if(chmod($fname, 0777)==false) return false;return $fname.'/';}/****************************** 組建檔案名* $fname ==> 檔案名稱* $ftype ==> 檔案類型*****************************/function MakeFname($ftype) { $fname = date("mdHis").'_'.rand(100000, 999999);return $fname.'.'.$ftype;}?>

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