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简单的PHP图像处理类库

Jun 06, 2016 pm 07:38 PM
php image Image Processing Simple Class library

简单写了一个PHP的图像处理类库,虽然功能比较少,但是目前也没用到太高级的,以后用到了再填吧,或者哪位给点建议加上什么功能,或者有什么需求可以跟我说,我有时间加上,如果哪位对这个类库进行了扩展的话,还麻烦拿出来大家分享一下,代码现在是能用就行

简单写了一个PHP的图像处理类库,虽然功能比较少,但是目前也没用到太高级的,以后用到了再填吧,或者哪位给点建议加上什么功能,或者有什么需求可以跟我说,我有时间加上,如果哪位对这个类库进行了扩展的话,还麻烦拿出来大家分享一下,代码现在是能用就行,考虑的东西不是很多,有什么更好的建议请告诉我,谢谢
<?php
/**
 * Created by PhpStorm.
 * User: MCtion
 * Date: 2015/5/14 0014
 * Time: 15:36
 * 简单的图像类库,本类中所有相对路径均基于网站根目录,如需修改,则修改常量__WEBROOT__即可
 * 功能:指定文字内容创建图片(不支持中文)、创建验证码图片、创建缩略图、其他功能待续
 * 方法:
 * 		Style(array $Options) 设置图片样式,每次设定前将重置为默认样式
 * 		Create_Img_Png() 创建PNG图像,相关属性由Style指定
 * 		Create_Img_Jpeg() 创建JPEG图像,相关属性由Style指定
 * 		Create_Verify() 创建验证码图像,相关属性由Style指定
 * 		Get_Verify() 获得创建的验证码值,MD5加密
 * 		Load_Img(string $FilePath) 加载图像,创建图像源,供其他方法调用源,FilePath为图像相对路径
 * 		Create_Thumb(string $FileName,string $FilePath) 创建由Load_Img()加载的图像的缩略图,FileName为保存后的图像前缀,FilePath为保存图像的相对路径,不包含文件名(例:/Uploads/images/Thumb/)
 */

if(!defined("__WEBROOT__")) define("__WEBROOT__",$_SERVER['DOCUMENT_ROOT']);

class Img {
	protected $_Img; //图片源
	protected $_FileImg; //加载的图片源
	protected $_FileInfo; //加载的图片的信息数组
	protected $_PicInfo; //加载的图片的宽高等信息数组
	protected $_Rand = 'abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ1234567890'; //随机因子
	protected $_Code = ''; //验证码
	public $Width = 300;//图片默认宽
	public $Height = 80; //图片默认高
	public $BackgroundColor = "000000";
	public $Font = "/phps/Public/Font/ARIALNB.TTF"; //默认字体
	public $FontSize = 16; //默认字体字号
	public $FontColor = "ffffff"; //默认字体颜色
	public $Content = "Test Word";
	public $Align = "left";
	public $Codes = 4; //验证码个数
	public $Line = 6; //干扰线条的个数
	public $LoadErr = ''; //错误信息

	//public function __construct(){}

	/** 设置图片属性
	 * @param array $Options 属性数组
	 * @return $this 返回对象
	 */
	public function Style($Options){
		$this -> _Re_Set();
		foreach($Options as $K=>$V){
			if(in_array($K,array('Width','Height','BackgroundColor','Font','FontSize','FontColor','Content','Align','Codes','Line','Snow'))){
				if($K == "BackgroundColor" || $K == "FontColor"){
					if(preg_match("#([a-zA-Z0-9]{6})#",$V)) $this -> $K = $V;
				}else{
					$this -> $K = $V;
				}
			}
		}
		return $this;
	}

	/**
	 * 重置属性,不提供外部访问
	 */
	protected function _Re_Set(){
		$this -> Width = 100;
		$this -> Height = 30;
		$this -> BackgroundColor = "000000";
		$this -> Font = "/phps/Public/Font/ARIALNB.TTF";
		$this -> FontSize = 16;
		$this -> FontColor = "ffffff";
		$this -> Align = "left";
		$this -> Codes =4;
		$this -> Line = 6;
	}

	/**
	 * 创建图像源、添加背景、创建图像
	 * @param bool $BGC 指定是否创建背景色及矩形块
	 */
	protected function _Create_Img_GB($BGC = True){
		$this -> _Img = imagecreatetruecolor($this -> Width,$this -> Height); //创建背景源
		if($BGC){
			preg_match("#([a-zA-Z0-9]{2})([a-zA-Z0-9]{2})([a-zA-Z0-9]{2})#",$this -> BackgroundColor,$ColorArr); //将颜色值分隔成三组16位进制数
			$Color = imagecolorallocate($this -> _Img,hexdec($ColorArr[1]),hexdec($ColorArr[2]),hexdec($ColorArr[3])); //给Img图像源添加背景色
			imagefilledrectangle($this -> _Img,0,$this -> Height,$this -> Width,0,$Color); //创建图像
		}
	}

	/**
	 * 创建随机验证码
	 */
	protected function _Create_Code(){
		$Len = strlen($this -> _Rand) - 1;
		for($i = 0;$i < $this -> Codes;$i++){
			$this -> _Code .= $this -> _Rand[mt_rand(0,$Len)];
		}
	}

	/**
	 * 向图像中写入字符串,暂不支持中文
	 */
	protected function _Write_Text(){
		$FontWidth = imagefontwidth($this -> FontSize); //获取字号的一个字符的宽度
		preg_match_all('/(.)/us', $this -> Content, $TextArr); //将内容分隔成数组一遍统计个数
		$FontHeight = imagefontheight($this -> FontSize); //获取字号的高度
		$X = ceil(($this -> Width - ($FontWidth * count($TextArr[0]))) / 2); //设置X轴距左边距的距离
		$Y = ceil(($this -> Height + $FontHeight) / 2); //设置Y轴距上边距的距离
		preg_match("#([a-zA-Z0-9]{2})([a-zA-Z0-9]{2})([a-zA-Z0-9]{2})#",$this -> FontColor,$ColorArr);
		$Color = imagecolorallocate($this -> _Img,hexdec($ColorArr[1]),hexdec($ColorArr[2]),hexdec($ColorArr[3])); //设置文字颜色
		imagettftext($this -> _Img,$this -> FontSize,0,$X,$Y,$Color,__WEBROOT__.$this -> Font,$this -> Content); //写入内容
	}

	/**
	 * 向图像中写入验证码
	 */
	protected function _Write_Code(){
		$_X = $this -> Width / $this -> Codes; //设置宽高比
		for($i = 0;$i < $this -> Codes;$i++){ //循环Codes次,每次生成一位验证码值
			$Color = imagecolorallocate($this -> _Img,mt_rand(0,156),mt_rand(0,156),mt_rand(0,156)); //随机生成验证码值的颜色
			imagettftext($this -> _Img,$this -> FontSize,mt_rand(-30,30),$_X*$i+mt_rand(1,5),$this -> Height / 1.3,$Color,__WEBROOT__.$this -> Font,$this -> _Code[$i]); //生成一位验证码值
		}
	}

	/**
	 * 向图像中写入干扰线条
	 */
	protected function _Write_Line() { //生成干扰线条
		for ($i=0;$i < $this -> Line;$i++) {
			$Color = imagecolorallocate($this -> _Img,mt_rand(0,156),mt_rand(0,156),mt_rand(0,156));
			imageline($this -> _Img,mt_rand(0,$this -> Width),mt_rand(0,$this -> Height),mt_rand(0,$this -> Width),mt_rand(0,$this -> Height),$Color);
		}
	}

	/**
	 * 设置图像类型为JPEG
	 */
	protected function _Img_Jpeg(){
		header('Content-type:image/jpeg');
		imagejpeg($this -> _Img);
		imagedestroy($this -> _Img);
	}

	/**
	 * 设置图像类型为PNG
	 */
	protected function _Img_Png(){
		header('Content-type:image/png');
		imagepng($this -> _Img);
		imagedestroy($this -> _Img);
	}

	/**
	 * 创建JPEG的字符串图像
	 */
	public function Create_Img_Jpg(){
		$this -> _Create_Img_GB(True);
		$this -> _Write_Text();
		$this -> _Img_Jpeg();
	}

	/**
	 * 创建PNG的字符串图像
	 */
	public function Create_Img_Png(){
		$this -> _Create_Img_GB(True);
		$this -> _Write_Text();
		$this -> _Img_Png();
	}

	/**
	 * 创建验证码的PNG图像
	 */
	public function Create_Verify(){
		$this -> BackgroundColor = '';
		for($I = 0;$I < 3;$I++){
			$this -> BackgroundColor .= dechex(mt_rand(20,155));
		}
		$this -> _Create_Img_GB(True);
		$this -> _Create_Code();
		$this -> _Write_Line();
		$this -> _Write_Code();
		$this -> _Img_Png();
	}

	/**
	 * 外部获取MD5加密后的验证码
	 * @return string
	 */
	public function Get_Verify(){
		return md5($this -> _Code);
	}

	/**
	 * 加载一个图像文件,并获取图像相关信息
	 * @param string $FilePath 图像相对路径地址
	 * @return $this|bool 成功返回对象,否则返回FALSE
	 */
	public function Load_Img($FilePath){
		$FilePath = __WEBROOT__.$FilePath;
		if(!is_file($FilePath)){
			$this -> LoadErr = "路径错误,文件不存在";
			Return False;
		}
		$this -> _PicInfo = getimagesize($FilePath);
		$this -> _FileInfo = pathinfo($FilePath);
		switch($this -> _PicInfo[2]){
			case 1:$this ->_FileImg = imagecreatefromgif($FilePath);break;
			case 2:$this ->_FileImg = imagecreatefromjpeg($FilePath);break;
			case 3:$this ->_FileImg = imagecreatefrompng($FilePath);break;
			default:$this -> LoadErr = "类型错误,不支持的图片类型";Return False;
		}
		Return True;
	}

	/**
	 * 创建缩略图
	 * @param string $FileName 保存的图片名称前缀
	 * @param string $FilePath 保存图片的相对路径
	 * @return mixed 返回生成的图片的信息数组
	 */
	public function Create_Thumb($FileName,$FilePath){
		$SavePath = __WEBROOT__.$FilePath;
		if(!file_exists($SavePath)){
			mkdir($SavePath,0777,true);
		}
		$FileName = $FileName.date("YmdHis").rand(100,999).'.'.$this -> _FileInfo['extension'];
		$FilePath = $FilePath.$FileName;
		$SavePath = $SavePath.$FileName;
		$this -> _Create_Img_GB(False);
		imagecopyresampled($this -> _Img,$this -> _FileImg,0,0,0,0,$this -> Width,$this -> Height,$this -> _PicInfo[0],$this -> _PicInfo[1]);
		switch($this -> _PicInfo[2]){
			case 1:imagegif($this -> _Img,$SavePath);break;
			case 2:imagejpeg($this -> _Img,$SavePath);break;
			case 3:imagepng($this -> _Img,$SavePath);break;
		}
		$FIleInfo['FileName'] = $FileName;
		$FIleInfo['FilePath'] = $FilePath;
		Return $FIleInfo;
	}
}
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$Img = new Img();

$Options['Width'] = 300;
$Options['Height'] = 100;
$Options['Content'] = "Test Create Img";
$Options['FontColor'] = "FF0000";
$Options['BackgroundColor'] = "AAAAAA";
$Img -> Style($Options) -> Create_Img_Jpg();

if($Img -> Load_Img("/Public/images/ad1.png")){
	$FileInfo = $Img -> Style(array('Width'=>30,'Height'=>30)) -> Create_Thumb("Thumb","/Uploads/images/");
	var_dump($FileInfo);
}else{
	die("加载图像失败,".$Img -> LoadErr);
}
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