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php教程php手册php 将图片保存为不同规格的图片

php 将图片保存为不同规格的图片

Jun 13, 2016 am 11:34 AM
classphp다른그림다루다할 것이다~의친절한사양

 1.图片处理类.imagecls.php

<?php
/**
	图片处理类
 */
class imagecls
{
	/**
	 * 文件信息
	 */
	var $file = array();
	/**
	 * 保存目录
	 */
	var $dir = '';
	/**
	 * 错误代码
	 */
	var $error_code = 0;
	/**
	 * 文件上传最大KB
	 */
	var $max_size = -1;

	function es_imagecls()
	{

	}
	
    private function checkSize($size)
    {
        return !($size > $this->max_size) || (-1 == $this->max_size);
    }
    
	/**
	 * 处理上传文件
	 * @param array $file 上传的文件
	 * @param string $dir 保存的目录
	 * @return bool
	 */
	function init($file, $dir = 'temp')
	{
		if(!is_array($file) || empty($file)
   || !$this->isUploadFile($file['tmp_name']) || trim($file['name']) == '' || $file['size'] == 0)
		{
			$this->file = array();
			$this->error_code = -1;
			return false;
		}
		else
{
$file['size'] = intval($file['size']);
$file['name'] =  trim($file['name']);
$file['thumb'] = '';
$file['ext'] = $this->fileExt($file['name']);
$file['name'] =  htmlspecialchars($file['name'], ENT_QUOTES);
$file['is_image'] = $this->isImageExt($file['ext']);
$file['file_dir'] = $this->getTargetDir($dir);
$file['prefix'] = md5(microtime(true)).rand(10,99);
$file['target'] = "./public/".$file['file_dir'].'/'.$file['prefix'].'.jpg';  //相对
$file['local_target'] = APP_ROOT_PATH."public/".$file['file_dir'].'/'.$file['prefix'].'.jpg';//物理
	$this->file = &$file;

			$this->error_code = 0;
			return true;
		}

	}

	/**
	 * 保存文件
	 * @return bool
	 */
	function save()
	{
		if(empty($this->file) || empty($this->file['tmp_name']))
			$this->error_code = -101;
		elseif(!$this->checkSize($this->file['size']))
			$this->error_code = -105;
		elseif(!$this->file['is_image'])
			$this->error_code = -102;
		elseif(!$this->saveFile($this->file['tmp_name'], $this->file['local_target']))
			$this->error_code = -103;
                  elseif($this->file['is_image'] && 
          (!$this->file['image_info'] = $this->getImageInfo($this->file['local_target'], true)))
		{
			$this->error_code = -104;
			@unlink($this->file['local_target']);
		}
		else
		{
			$this->error_code = 0;
			return true;
		}
		return false;
	}

	/**
	 * 获取错误代码
	 * @return number
	 */
	function error()
	{
		return $this->error_code;
	}

	/**
	 * 获取文件扩展名
	 * @return string
	 */
	function fileExt($file_name)
	{
		return addslashes(strtolower(substr(strrchr($file_name, '.'), 1, 10)));
	}

	/**
	 * 根据扩展名判断文件是否为图像
	 * @param string $ext 扩展名
	 * @return bool
	 */
	function isImageExt($ext)
	{
		static $img_ext  = array('jpg', 'jpeg', 'png', 'bmp','gif','giff');
		return in_array($ext, $img_ext) ? 1 : 0;
	}

	/**
	 * 获取图像信息
	 * @param string $target 文件路径
	 * @return mixed
	 */
	function getImageInfo($target)
	{
		$ext = es_imagecls::fileExt($target);
		$is_image = es_imagecls::isImageExt($ext);

		if(!$is_image)
			return false;
		elseif(!is_readable($target))
			return false;
		elseif($image_info = @getimagesize($target))
		{
			list($width, $height, $type) = !empty($image_info) ? $image_info : 
                           array('', '', '');
			$size = $width * $height;
			if($is_image && !in_array($type, array(1,2,3,6,13)))
				return false;

			$image_info['type'] =
                       strtolower (substr(image_type_to_extension($image_info[2]),1));
			return $image_info;
		}
		else
			return false;
	}

	/**
	 * 获取是否充许上传文件
	 * @param string $source 文件路径
	 * @return bool
	 */
	function isUploadFile($source)
	{
		return $source && ($source != 'none') && 
          (is_uploaded_file($source) || is_uploaded_file(str_replace('', '', $source)));
	}

	/**
	 * 获取保存的路径
	 * @param string $dir 指定的保存目录
	 * @return string
	 */
	function getTargetDir($dir)
	{	      
        if (!is_dir(APP_ROOT_PATH."public/".$dir)) { 
             @mkdir(APP_ROOT_PATH."public/".$dir);
             @chmod(APP_ROOT_PATH."public/".$dir, 0777);
        }
        return $dir;
	}

	/**
	 * 保存文件
	 * @param string $source 源文件路径
	 * @param string $target 目录文件路径
	 * @return bool
	 */
	private function saveFile($source, $target)
	{
		if(!es_imagecls::isUploadFile($source))
			$succeed = false;
		elseif(@copy($source, $target))
			$succeed = true;
		elseif(function_exists('move_uploaded_file') && 
                     @move_uploaded_file($source, $target))
			$succeed = true;
		elseif (@is_readable($source) && 
                   (@$fp_s = fopen($source, 'rb')) && (@$fp_t = fopen($target, 'wb')))
		{
			while (!feof($fp_s))
			{
				$s = @fread($fp_s, 1024 * 512);
				@fwrite($fp_t, $s);
			}
			fclose($fp_s);
			fclose($fp_t);
			$succeed = true;
		}

		if($succeed)
		{
			$this->error_code = 0;
			@chmod($target, 0644);
			@unlink($source);
		}
		else
		{
			$this->error_code = 0;
		}

		return $succeed;
	}

	public function thumb($image,$maxWidth=200,$maxHeight=50,$gen = 0,
          $interlace=true,$filepath = '',$is_preview = true)
    {
        $info  = es_imagecls::getImageInfo($image);

        if($info !== false)
		{
            $srcWidth  = $info[0];
            $srcHeight = $info[1];
			$type = $info['type'];

            $interlace  =  $interlace? 1:0;
            unset($info);

			if($maxWidth > 0 && $maxHeight > 0)
			$scale = min($maxWidth/$srcWidth, $maxHeight/$srcHeight); 
                                // 计算缩放比例
			elseif($maxWidth == 0)
				$scale = $maxHeight/$srcHeight;
			elseif($maxHeight == 0)
				$scale = $maxWidth/$srcWidth;

				
			$paths = pathinfo($image);
			$paths['filename'] = trim(strtolower($paths['basename']),
                            ".".strtolower($paths['extension']));
			$basefilename = explode("_",$paths['filename']);
			$basefilename = $basefilename[0];
			if(empty($filepath))
			{
				if($is_preview)
				$thumbname = $paths['dirname'].'/'.$basefilename.
                                     '_'.$maxWidth.'x'.$maxHeight.'.jpg';
				else
				$thumbname = $paths['dirname'].'/'.$basefilename.
                                     'o_'.$maxWidth.'x'.$maxHeight.'.jpg';
			}
			else
				$thumbname = $filepath;

			$thumburl = str_replace(APP_ROOT_PATH,'./',$thumbname);
				
            if($scale >= 1)
			{
                // 超过原图大小不再缩略
                $width   =  $srcWidth;
                $height  =  $srcHeight;         
                if(!$is_preview)
                {       
                	//非预览模式写入原图
                	file_put_contents($thumbname,file_get_contents($image));    //用原图写入            
                	return array('url'=>$thumburl,'path'=>$thumbname);
                }
            }
			else
			{
                // 缩略图尺寸
                $width  = (int)($srcWidth*$scale);
                $height = (int)($srcHeight*$scale);
            }		
			
			if($gen == 1)
			{
				$width = $maxWidth;
				$height = $maxHeight;
			}

            // 载入原图
            $createFun = 'imagecreatefrom'.($type=='jpg'?'jpeg':$type);
			if(!function_exists($createFun))
				$createFun = 'imagecreatefromjpeg';

            $srcImg = $createFun($image);

            //创建缩略图
            if($type!='gif' && function_exists('imagecreatetruecolor'))
                $thumbImg = imagecreatetruecolor($width, $height);
            else
                $thumbImg = imagecreate($width, $height);

			$x = 0;
			$y = 0;

			if($gen == 1 && $maxWidth > 0 && $maxHeight > 0)
			{
				$resize_ratio = $maxWidth/$maxHeight;
				$src_ratio = $srcWidth/$srcHeight;
				if($src_ratio >= $resize_ratio)
				{
				$x = ($srcWidth - ($resize_ratio * $srcHeight)) / 2;
				$width = ($height * $srcWidth) / $srcHeight;
				}
				else
				{
				$y = ($srcHeight - ( (1 / $resize_ratio) * $srcWidth)) / 2;
				$height = ($width * $srcHeight) / $srcWidth;
				}
			}

            // 复制图片
            if(function_exists("imagecopyresampled"))
                imagecopyresampled($thumbImg, $srcImg, 0, 0, $x, $y, $width, $height, 
               $srcWidth,$srcHeight);
            else
                imagecopyresized($thumbImg, $srcImg, 0, 0, $x, $y, $width, $height, 
             $srcWidth,$srcHeight);
            if('gif'==$type || 'png'==$type) {
                $background_color  =  imagecolorallocate($thumbImg,  0,255,0);  //  指派一个绿色
				imagecolortransparent($thumbImg,$background_color);  
                             //  设置为透明色,若注释掉该行则输出绿色的图
            }

            // 对jpeg图形设置隔行扫描
            if('jpg'==$type || 'jpeg'==$type)
				imageinterlace($thumbImg,$interlace);

            // 生成图片
            imagejpeg($thumbImg,$thumbname,100);
            imagedestroy($thumbImg);
            imagedestroy($srcImg);

			return array('url'=>$thumburl,'path'=>$thumbname);
         }
         return false;
    }

	public function make_thumb($srcImg,$srcWidth,$srcHeight,$type,$maxWidth=200,
         $maxHeight=50,$gen = 0)
    {

            $interlace  =  $interlace? 1:0;

			if($maxWidth > 0 && $maxHeight > 0)
				$scale = min($maxWidth/$srcWidth, $maxHeight/$srcHeight);
                                       // 计算缩放比例
			elseif($maxWidth == 0)
				$scale = $maxHeight/$srcHeight;
			elseif($maxHeight == 0)
				$scale = $maxWidth/$srcWidth;

            if($scale >= 1)
			{
                // 超过原图大小不再缩略
                $width   =  $srcWidth;
                $height  =  $srcHeight;
            }
			else
			{
                // 缩略图尺寸
                $width  = (int)($srcWidth*$scale);
                $height = (int)($srcHeight*$scale);
            }

			if($gen == 1)
			{
				$width = $maxWidth;
				$height = $maxHeight;
			}


            //创建缩略图
            if($type!='gif' && function_exists('imagecreatetruecolor'))
                $thumbImg = imagecreatetruecolor($width, $height);
            else
                $thumbImg = imagecreatetruecolor($width, $height);

			$x = 0;
			$y = 0;

			if($gen == 1 && $maxWidth > 0 && $maxHeight > 0)
			{
				$resize_ratio = $maxWidth/$maxHeight;
				$src_ratio = $srcWidth/$srcHeight;
				if($src_ratio >= $resize_ratio)
				{
				$x = ($srcWidth - ($resize_ratio * $srcHeight)) / 2;
				$width = ($height * $srcWidth) / $srcHeight;
				}
				else
				{
				$y = ($srcHeight - ( (1 / $resize_ratio) * $srcWidth)) / 2;
				$height = ($width * $srcHeight) / $srcWidth;
				}
			}

            // 复制图片
            if(function_exists("imagecopyresampled"))
                imagecopyresampled($thumbImg, $srcImg, 0, 0, $x, $y, $width, $height, 
                    $srcWidth,$srcHeight);
            else
                imagecopyresized($thumbImg, $srcImg, 0, 0, $x, $y, $width, $height, 
                  $srcWidth,$srcHeight);
            if('gif'==$type || 'png'==$type) {
                $background_color  =  imagecolorallocate($thumbImg,  255,255,255);  
                //  指派一个绿色
		imagecolortransparent($thumbImg,$background_color); 
              //  设置为透明色,若注释掉该行则输出绿色的图
            }

            // 对jpeg图形设置隔行扫描
            if('jpg'==$type || 'jpeg'==$type)
				imageinterlace($thumbImg,$interlace);

           return $thumbImg;
        

    }
    
	public function water($source,$water,$alpha=80,$position="0")
    {
        //检查文件是否存在
        if(!file_exists($source)||!file_exists($water))
            return false;

        //图片信息
        $sInfo = es_imagecls::getImageInfo($source);
        $wInfo = es_imagecls::getImageInfo($water);

        //如果图片小于水印图片,不生成图片
        if($sInfo["0"] < $wInfo["0"] || $sInfo['1'] < $wInfo['1'])
            return false;


            
        if(is_animated_gif($source))
        {
        	require_once APP_ROOT_PATH."system/utils/gif_encoder.php";
			require_once APP_ROOT_PATH."system/utils/gif_reader.php";

			$gif = new GIFReader();
			$gif->load($source);
			foreach($gif->IMGS['frames'] as $k=>$img)
			{
				$im = imagecreatefromstring($gif->getgif($k));		
				//为im加水印
				$sImage=$im;		
		        $wCreateFun="imagecreatefrom".$wInfo['type'];
				if(!function_exists($wCreateFun))
					$wCreateFun = 'imagecreatefromjpeg';
		        $wImage=$wCreateFun($water);
		        		
		        //设定图像的混色模式
		        imagealphablending($wImage, true);		
		        switch (intval($position))
		        {
		        	case 0: break;
		        	//左上
		        	case 1:
		        		$posY=0;
				        $posX=0;
				        //生成混合图像
	imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
		        		break;
		        	//右上
		        	case 2:
		        		$posY=0;
				        $posX=$sInfo[0]-$wInfo[0];
				        //生成混合图像
	imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
		        		break;
		        	//左下
		        	case 3:
		        		$posY=$sInfo[1]-$wInfo[1];
				        $posX=0;
				        //生成混合图像
	imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
		        		break;
		        	//右下
		        	case 4:
				        $posY=$sInfo[1]-$wInfo[1];
				        $posX=$sInfo[0]-$wInfo[0];
				        //生成混合图像
	imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
		        		break;
		        	//居中
		        	case 5:
				        $posY=$sInfo[1]/2-$wInfo[1]/2;
				        $posX=$sInfo[0]/2-$wInfo[0]/2;
				        //生成混合图像
	imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
		        		break;
		        }
				//end im加水印
				
				
				ob_start();
				imagegif($sImage);
				$content = ob_get_contents();
		        ob_end_clean();
				$frames [ ] = $content;
		   		$framed [ ] = $img['frameDelay'];
			}
		
				
			$gif_maker = new GIFEncoder (
			       $frames,
			       $framed,
			       0,
			       2,
			       0, 0, 0,
			       "bin"   //bin为二进制   url为地址
			  );
			$image_rs = $gif_maker->GetAnimation ( );
			
			//如果没有给出保存文件名,默认为原图像名
	        @unlink($source);
	        //保存图像
	        file_put_contents($source,$image_rs);
	        return true;
        }   
            
        //建立图像
		$sCreateFun="imagecreatefrom".$sInfo['type'];
		if(!function_exists($sCreateFun))
			$sCreateFun = 'imagecreatefromjpeg';
		$sImage=$sCreateFun($source);

        $wCreateFun="imagecreatefrom".$wInfo['type'];
		if(!function_exists($wCreateFun))
			$wCreateFun = 'imagecreatefromjpeg';
        $wImage=$wCreateFun($water);

        //设定图像的混色模式
        imagealphablending($wImage, true);

        switch (intval($position))
        {
        	case 0: break;
        	//左上
        	case 1:
        		$posY=0;
		        $posX=0;
		        //生成混合图像
	imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
        		break;
        	//右上
        	case 2:
        		$posY=0;
		        $posX=$sInfo[0]-$wInfo[0];
		        //生成混合图像
	imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
        		break;
        	//左下
        	case 3:
        		$posY=$sInfo[1]-$wInfo[1];
		        $posX=0;
		        //生成混合图像
	imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
        		break;
        	//右下
        	case 4:
		        $posY=$sInfo[1]-$wInfo[1];
		        $posX=$sInfo[0]-$wInfo[0];
		        //生成混合图像
	imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
        		break;
        	//居中
        	case 5:
		        $posY=$sInfo[1]/2-$wInfo[1]/2;
		        $posX=$sInfo[0]/2-$wInfo[0]/2;
		        //生成混合图像
	 imagecopymerge($sImage, $wImage, $posX, $posY, 0, 0, $wInfo[0],$wInfo[1],$alpha);
        		break;
        }

        //如果没有给出保存文件名,默认为原图像名
        @unlink($source);
        //保存图像
        imagejpeg($sImage,$source,100);
        imagedestroy($sImage);
    }
}

if(!function_exists('image_type_to_extension'))
{
	function image_type_to_extension($imagetype)
	{
		if(empty($imagetype))
			return false;

		switch($imagetype)
		{
			case IMAGETYPE_GIF    : return '.gif';
			case IMAGETYPE_JPEG   : return '.jpeg';
			case IMAGETYPE_PNG    : return '.png';
			case IMAGETYPE_SWF    : return '.swf';
			case IMAGETYPE_PSD    : return '.psd';
			case IMAGETYPE_BMP    : return '.bmp';
			case IMAGETYPE_TIFF_II : return '.tiff';
			case IMAGETYPE_TIFF_MM : return '.tiff';
			case IMAGETYPE_JPC    : return '.jpc';
			case IMAGETYPE_JP2    : return '.jp2';
			case IMAGETYPE_JPX    : return '.jpf';
			case IMAGETYPE_JB2    : return '.jb2';
			case IMAGETYPE_SWC    : return '.swc';
			case IMAGETYPE_IFF    : return '.aiff';
			case IMAGETYPE_WBMP   : return '.wbmp';
			case IMAGETYPE_XBM    : return '.xbm';
			default               : return false;
		}
	}
}
?>
<p>2.get_spec_img()调用图片类,然后再用下面的方法保存不同规格的图片并返回图片连接</p><pre class="code">
//获取相应规格的图片地址
//gen=0:保持比例缩放,不剪裁,如高为0,则保证宽度按比例缩放  gen=1:保证长宽,剪裁
function get_spec_image($img_path,$width=0,$height=0,$gen=0,$is_preview=true)
{
	if($width==0)
		$new_path = $img_path;
	else
	{
		$img_name = substr($img_path,0,-4);
		$img_ext = substr($img_path,-3);	
		if($is_preview)
		$new_path = $img_name."_".$width."x".$height.".jpg";	
		else
		$new_path = $img_name."o_".$width."x".$height.".jpg";	
		if(!file_exists($new_path))
		{
			require_once "imagecls.php";
			$imagec = new imagecls();
			$thumb = $imagec->thumb($img_path,$width,$height,$gen,true,"
                           ",$is_preview);
			
			if(app_conf("PUBLIC_DOMAIN_ROOT")!='')
        	{
        		$paths = pathinfo($new_path);
        		$path = str_replace("./","",$paths['dirname']);
        		$filename = $paths['basename'];
        		$pathwithoupublic = str_replace("public/","",$path);
	        	
                        $file_data = @file_get_contents($path.$file);
                      $img = @imagecreatefromstring($file_data);
                      if($img!==false)
                      {
                        $save_path = "public/".$path;
                        if(!is_dir($save_path))
                        {
                            @mk_dir($save_path);         
                        }
                        @file_put_contents($save_path.$name,$file_data);
                      }
        	}
			
		}
	}
	return $new_path;
}

3.使用方法:

//im:将店铺图片保存为3种规格:小图:48x48,中图120x120,大图200x200
			$small_url=get_spec_image($data['image'],48,48,0);
			$<span id="result_box" class="short_text" lang="en">
                  <span>middle_url</span></span>=get_spec_image($data['image'],120,120,0);
			$big_url=get_spec_image($data['image'],200,200,0);

 

성명
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무료로 이미지를 벗다

Clothoff.io

Clothoff.io

AI 옷 제거제

Video Face Swap

Video Face Swap

완전히 무료인 AI 얼굴 교환 도구를 사용하여 모든 비디오의 얼굴을 쉽게 바꾸세요!

뜨거운 도구

VSCode Windows 64비트 다운로드

VSCode Windows 64비트 다운로드

Microsoft에서 출시한 강력한 무료 IDE 편집기

ZendStudio 13.5.1 맥

ZendStudio 13.5.1 맥

강력한 PHP 통합 개발 환경

맨티스BT

맨티스BT

Mantis는 제품 결함 추적을 돕기 위해 설계된 배포하기 쉬운 웹 기반 결함 추적 도구입니다. PHP, MySQL 및 웹 서버가 필요합니다. 데모 및 호스팅 서비스를 확인해 보세요.

메모장++7.3.1

메모장++7.3.1

사용하기 쉬운 무료 코드 편집기

mPDF

mPDF

mPDF는 UTF-8로 인코딩된 HTML에서 PDF 파일을 생성할 수 있는 PHP 라이브러리입니다. 원저자인 Ian Back은 자신의 웹 사이트에서 "즉시" PDF 파일을 출력하고 다양한 언어를 처리하기 위해 mPDF를 작성했습니다. HTML2FPDF와 같은 원본 스크립트보다 유니코드 글꼴을 사용할 때 속도가 느리고 더 큰 파일을 생성하지만 CSS 스타일 등을 지원하고 많은 개선 사항이 있습니다. RTL(아랍어, 히브리어), CJK(중국어, 일본어, 한국어)를 포함한 거의 모든 언어를 지원합니다. 중첩된 블록 수준 요소(예: P, DIV)를 지원합니다.