PHP 添加水印 & 比例缩略图 & 固定高度 & 固定宽度 类。

<?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
?>