利用php GD库 文字图片水印 缩略图

一：添加文字水印 使用方法

require 'image.class.php'
$src="001.jpg";
$content="hello";
$font_url="my.ttf";
$size=20;
$image=new Image($src);
$color=array(
0=>255,
1=>255,
2=>255,
2=>20
);
$local=array(
'x'=>20,
'y'=>30
);
$angle=10;
$image->fontMark($content,$font_url,$size,$color,$local,$angle);
$image->show();

二：图片缩略图 使用方法：

require 'image.class.php'
$src="001.jpg";
$image=new Image($src);
$image->thumb(300,200);
$image->show();

三：image.class.php

class image{
private $info;
private $image;
public function __contruct($src){
$info= getimagesize($src);
$this->info=array(
'width'=> $info[0],
'height'=>$info[1],
'type'=>image_type_to_extension($info[2],false),
'mime'=>$info['mime'],
 
);
$fun="imagecreatefrom{$this->info['type']}";
 
$this->image= $fun($src);
 
}
 
//缩略图
public function thumd($width,$height){
$image_thumb= imagecreatetruecolor($width,$height);
imagecopyresampled($image_thumb,$this->image,0,0,0,0,$width,$height,$this->info['width'],$this->info['height']);
imagedestroy($this->image);
$this->image=$image_thumb;
 
}
//文字水印
public function fontMark($content,$font_url,$size,$color,$local,$angle){
 
$col=imagecolorallocatealpha($this->image,$color[0],$color[1],$color[2],$color[3]);
$text=imagettftext($this->image,$size,$angle,$local['x'],$local['y'],$col,$font_url,$content);
}
//输出图片
public function show()
{
header("Content-type:",$this->info['mime']);
 
$func="image{$this->info['type']}";
$func($this->image);
 
}
public function save($nwename){
$func="image{$this->info['type']}";
//从内存中取出图片显示
$func($this->image);
//保存图片
$func($this->image,$nwename.$this->info['type']);
 
}
public function _destruct(){
 
imagedestroy($this->image);
}
 
}