常用的php图片处理类（水印、等比缩放、固定高宽）分享

<?php  //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 ?>

<?php/** *  * 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 < $heightratio)   $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 < 0) ? $x : $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 < 0) ? $y : $org_img_im_y; //alpha $alpha = isset ( $option ['alpha'] ) ? $option ['alpha'] : 50; $alpha = ($alpha > 100 or $alpha < 0) ? 50 : $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 );}