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PHP图片上传
发表于 2015-8-31 | PHP
<?php

/**
 * 图片上传驱动
 * @author 	Devil
 * @version 1.0.0
 */
class ImageLibrary
{
	private $i_path;
	private $i_type;
	private $i_is_new_name;
	private $i_quality;
	private $i_data;

	/**
	 * [__construct 构造方法]
	 * @param [array] $parameters [参数列表]
	 */
	private function __construct($parameters)
	{
		/* 检测是否支持gd */
		$this->IsGD();

		/* 图片类型 */
		$this->i_type = empty($parameters['type']) ? $this->GetImageType() : $parameters['type'];

		/* 图片名称是否使用新名称, 则使用原图片名称 */
		$this->i_is_new_name = (isset($parameters['is_new_name']) && is_bool($parameters['is_new_name'])) ? $parameters['is_new_name'] : true;

		/* jpg图片的质量值, 值越大质量越好 */
		$this->i_quality = max(75, isset($parameters['quality']) ? intval($parameters['quality']) : 75);
	}

	/**
	 * [Instance 静态方法实例化本类]
	 * @return [object] [实例对象]
	 */
	public static function Instance($parameters = array())
	{
		static $object = null;
		if(!is_object($object)) $object = new self($parameters);
		return $object;
	}

	/**
	 * [SetParameters 参数设置]
	 * @param [array] $parameters [参数列表]
	 */
	public function SetParameters($parameters = array())
	{
		if(empty($parameters)) return;
		$this->__construct($parameters);
	}

	/**
	 * [Is_GD 检查是否支持gd库]
	 */
	private function IsGD()
	{
		if(!isset(gd_info()['GD Version']) || empty(gd_info()['GD Version'])) Api_Return(L('code_412'), 412);
	}

	/**
	 * [GetImageType 获取图片后缀类型]
	 * @return [array] [图片后缀类型]
	 */
	private function GetImageType()
	{
		return array(
			'gif'	=> 'image/gif',
			'png'	=> 'image/png',
			'jpg'	=> 'image/jpeg',
			'bmp'	=> 'image/bmp'
		);
	}

	/**
	 * [Initialization 基本信息初始化]
	 * @param  [array]   $data [临时图片数据]
	 * @param  [string]  $path [图片保存路径]
	 * @return [boolean]	   [true或false]
	 */
	private function Initialization($data, $path)
	{
		if(empty($data)) return false;

		/* 图片保存地址 */
		$path .= (substr($path, -1) == '/') ? '' : '/';
		$this->i_path = empty($path) ? '/tmp/image' : $path;

		/* 设置存储路径是否存在 */
		if(!is_dir($this->i_path)) @mkdir($this->i_path, 0777, true);
		if(!@opendir($this->i_path)) exit('dir not access');

		/* 初始化返回数据 */
		$this->i_data = array();

		return true;
	}

	/**
	 * [GetNewFileName 获取随机名称]
	 * @return [string] [新的名称]
	 */
	private function GetNewFileName()
	{
		return date('YmdHis').str_shuffle(rand());
	}

	/**
	 * [SaveBaseImages base64图片存储]
	 * @param  [array] $data  [需要存储的base数据, 一维数组]
	 * @param  [string] $path [存储路径]
	 * @return [array] 		  [返回图片地址, 一维数组]
	 */
	public function SaveBaseImages($data, $path)
	{
		if(!$this->Initialization($data, $path)) return null;

		for($i=0; $i<count($data); $i++)
		{
			if(empty($data[$i])) continue;

			$temp_img = str_replace(array("\n", '\n', ' '), '', $data[$i]);
			$img_info = @getimagesize('data://application/octet-stream;base64,'.$temp_img);
			if(empty($img_info['mime'])) continue;

			$type = $this->Is_ImageType($img_info['mime']);
			if($type == 'no') continue;

			$file_name = $this->GetNewFileName().'.'.$type;
			if(file_put_contents($this->i_path.$file_name, base64_decode($temp_img)) !== false) $this->i_data[] = $file_name;
		}
		return $this->i_data;
	}

	/**
	 * [SaveBinaryImages 二进制图片保存]
	 * @param  [array]  $data [二进制图片数据, 一维数组]
	 * @param  [string] $path [存储路径]
	 * @return [array] 		  [返回图片地址, 一维数组]
	 */
	public function SaveBinaryImages($data, $path)
	{
		if(!$this->Initialization($data, $path)) return null;

		for($i=0; $i<count($data); $i++)
		{
			if(empty($data[$i])) continue;

			$img_info = getimagesizefromstring($data[$i]);
			if(empty($img_info['mime'])) continue;

			$type = $this->Is_ImageType($img_info['mime']);
			if($type == 'no') continue;

			$file_name = $this->GetNewFileName().'.'.$type;
			if(file_put_contents($this->i_path.$file_name, $data) !== false) $this->i_data[] = $file_name;
		}
		return $this->i_data;
	}

	/**
	 * [GetOriginal 获取临时图片文件的原图]
	 * @param  [array]  $data [临时图片数据]
	 * @param  [string] $path [存储路径]
	 * @return [string] 	  [返回图片地址]
	 */
	public function GetOriginal($data, $path)
	{
		if(!$this->Initialization($data, $path)) return '';

		if(empty($data['tmp_name'])) return '';

		$type = $this->Is_ImageType($data['type']);
		if($type == 'no') return '';

		$file_name = $this->GetNewFileName().'.'.$type;

		if(move_uploaded_file($data['tmp_name'], $this->i_path.$file_name)) return $file_name;
		return '';
	}

	/**
	 * [GetBinaryCompress 获取指定图片路径的压缩图]
	 * @param  [string] $file  [图片地址]
	 * @param  [string] $path  [存储路径]
	 * @param  [int] 	$width [设定图片宽度]
	 * @param  [int] 	$height[指定图片高度, 不指定则高度按照比例自动计算]
	 * @return [string] 	   [返回图片地址]
	 */
	public function GetBinaryCompress($file, $path, $width = 0, $height = 0)
	{
		if(!$this->Initialization($file, $path) || is_array($file) || !file_exists($file)) return '';

		$img_info = pathinfo($file);
		if(empty($img_info['basename'])) return '';

		$type = $this->Is_ImageType($img_info['extension']);
		if($type == 'no') return '';

		$file_name = ($this->i_is_new_name) ? $this->GetNewFileName().'.'.$type : $img_info['basename'];

		if($this->ImageCompress($width, $height, $file, $type, $this->i_path.$file_name)) return $file_name;
		
		return '';
	}

	/**
	 * [GetCompress 获取临时图片文件的压缩图]
	 * @param  [array]  $data  [临时图片数据]
	 * @param  [string] $path  [存储路径]
	 * @param  [int] 	$width [设定图片宽度]
	 * @param  [int] 	$height[指定图片高度, 不指定则高度按照比例自动计算]
	 * @return [atring|空字符串] [返回图片存储的名称]
	 */
	public function GetCompress($data, $path, $width = 0, $height = 0)
	{
		if(!$this->Initialization($data, $path)) return '';

		if(empty($data['tmp_name'])) return '';
		
		$type = $this->Is_ImageType($data['type']);
		if($type == 'no') return '';

		$file_name = $this->GetNewFileName().'.'.$type;

		if($this->ImageCompress($width, $height, $data['tmp_name'], $type, $this->i_path.$file_name)) return $file_name;
		return '';
	}

	/**
	 * [GetCompressCut 临时图像裁剪]
	 * @param [array]  	$data       [图像临时数据]
	 * @param [string] 	$path       [图像存储地址]
	 * @param [int] 	$width      [指定存储宽度]
	 * @param [ing] 	$height     [指定存储高度]
	 * @param [ing] 	$src_x      [裁剪x坐标]
	 * @param [ing] 	$src_y      [裁剪y坐标]
	 * @param [ing] 	$src_width  [裁剪区域宽度]
	 * @param [ing] 	$src_height [裁剪区域高度]
	 * @return [atring|空字符串] [返回图片存储的名称]
	 */
	function GetCompressCut($data, $path, $width = 0, $height = 0, $src_x = 0, $src_y = 0, $src_width = 0, $src_height = 0)
	{
		if(!$this->Initialization($data, $path)) return '';

		if(empty($data['tmp_name'])) return '';
		
		$type = $this->Is_ImageType($data['type']);
		if($type == 'no') return '';

		$file_name = $this->GetNewFileName().'.'.$type;

		if($this->ImageCompress($width, $height, $data['tmp_name'], $type, $this->i_path.$file_name, $src_x, $src_y, $src_width, $src_height)) return $file_name;
		return '';
	}

	/**
	 * [ImageCompress 图片压缩]
	 * @param  [int] 	$width [指定图片宽度]
	 * @param  [int] 	$height[指定图片高度]
	 * @param  [string] $file  [原图片地址]
	 * @param  [string] $type  [类型]
	 * @param  [string] $path  [新图片地址]
	 * @return [boolean] 	   [成功true, 失败false]
	 */
	private function ImageCompress($width, $height, $file, $type, $path, $src_x = 0, $src_y = 0, $src_width = 0, $src_height = 0)
	{
		/* 获取图片原本尺寸 */
		list($w, $h) = getimagesize($file);
		
		/* 尺寸计算 */
		$new_width = ($width > 0 && $w > $width) ? $width : $w;
		$new_height = ($width > 0 && $w > $width) ? (round($h/($w/$width))) : $h;
		if($width > 0 && $height > 0) $new_width = $width;
		if($height > 0) $new_height = $height;

		/* url创建一个新图象 */
		switch($type)
	    {
	        case 'gif':
	            $src_im = @imagecreatefromgif($file);
	            break;
	        case 'png':
	            $src_im = @imagecreatefrompng($file);
	            break;
	        default:
	            $src_im = @imagecreatefromjpeg($file);
	    }
	    if(!$src_im) return;

	    /* 新建一个真彩色图像 */
	    $dst_im = imagecreatetruecolor($new_width, $new_height);

	    /* 是否裁剪图片 */
	    if($src_width > 0 && $src_height > 0)
	    {
	    	/* 新建拷贝大小的真彩图像 */
	    	$cpd_im = imagecreatetruecolor($src_width, $src_height);

	    	/* 拷贝图片 */
		    imagecopy($cpd_im, $src_im, 0, 0, $src_x, $src_y, $src_width, $src_height);

		    /* 图片缩放 */
		    $s = imagecopyresampled($dst_im, $cpd_im, 0, 0, 0, 0, $new_width, $new_height, $src_width, $src_height);
		} else {
			/* 图片缩放 */
	    	$s = imagecopyresampled($dst_im, $src_im, 0, 0, 0, 0, $new_width, $new_height, $w, $h);
		}
	    
	    if($s)
	    {
		    switch($type)
		    {
		        case 'png':
		            imagepng($dst_im, $path);
		            break;
		        case 'gif':
		            imagegif($dst_im, $path);
		            break;
		        default:
		            imagejpeg($dst_im, $path, $this->i_quality);
		    }
		}
		imagedestroy($dst_im);
		imagedestroy($src_im);

		return $s;
	}

	/**
	 * [Is_ImageType 验证后缀名是否合法]
	 * @param  [string] $image_type [图片后缀类型]
	 * @return [string] 			[后缀名或no]
	 */
	private function Is_ImageType($image_type)
	{
		if(empty($image_type)) return 'no';
		if(array_key_exists($image_type, $this->i_type)) return $image_type;

		foreach($this->i_type as $key=>$val)
		{
			if($val == $image_type) return $key;
		}
		return 'no';
	}
}
?>

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