php图片上传类,支持加水印,生成略缩图
分享一个网友写的php图片上传类,支持加水印,生成略缩图功能,里面是配置和可以获取的一些信息,每一个配置信息都有默认值,如无特殊需要,可以不配置,PHP类代码如下:
<?php /*---------------------------------------------------------------------------------- * *---------------------------------------------------------------------------------- */ class image_up{ //定义基本参数 private $uptype = array ( 'image/jpg' , 'image/jpeg' , 'image/png' , 'image/pjpeg' , 'image/gif' , 'image/bmp' , 'image/x-png' ); //上传文件类型 private $max_file_size =102400; //上传大小限制(单位:KB) private $destination_folder = "up/" ; //上传文件路径 private $watermark =1; //是否附加水印 private $watertype =1; //水印类型(1为文字,2为图片) private $waterposition =1; //水印位置(1为左下角,2为右下角,3为左上角,4为右上角,5为居中); private $waterstring =null; //水印字符串 private $waterimg =null; //水印图片 private $imgpreview =1; //是否生成预览图(1为生成,其他为不生成); private $imgpreviewsize =1; //预览图比例，0为按固定宽和高显示，其他为比例显示 private $imgwidth =200; //预览图固定宽度 private $imgheight =200; //预览图固定高度 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ private $imgthu =1; //是否生成且保存略缩图,1为生成，0为不生成 private $imgthu_folder =null; //略缩图保存路径,默认与文件路径一致 private $imgthu_fixed =0; //略缩图是否使用固定宽高，1为使用，0为灵活变动 private $imgthu_width =200; //略缩图宽度 private $imgthu_height =200; //略缩图高度 private $imgthu_name =null; //略缩图名称 //****************************************************************************************************************** private $inputname = "upfile" ; //文件上传框名称 //****************************************************************************************************************** private $img_preview_display ; //图片预览图显示 //****************************************************************************************************************** //文件上传相关信息，1为文件不存在，2为类型不符合，3为超出大小限制，4为上传失败，0为上传成功 private $file_up_info =null; //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //可在外部获取上传文件基本信息 private $file_name ; //客服端文件的原名称 private $file_type ; //文件的MIME类型 private $file_size ; //已上传文件的大小，单位/字节 private $file_tmp_name ; //储存的临时文件名 private $file_error ; //该文件上传相关错误代码 private $img_size ; //取得图片的长宽 private $file_basename ; //获取带扩展名的全名 private $file_extension ; //获取文件扩展名 private $filename ; //文件名（不带扩展名) private $destination ; //问价路径加名称 //****************************************************************************************************************** public function __set( $propety_name , $value ){ $this -> $propety_name = $value ; } public function __get( $property_name ){ if (isset( $this -> $property_name )) return ( $this -> $property_name ); else return (NULL); } //****************************************************************************************************************** //定义文件上传功能 public function up(){ //判断文件是否存在 if (! is_uploaded_file ( $_FILES [ $this ->inputname][ "tmp_name" ])){ $this ->file_up_info=1; return ; } //获取并赋值相应基本参数 $upfile = $_FILES [ $this ->inputname]; $this ->file_name= $upfile [ "name" ]; $this ->file_type= $upfile [ "type" ]; $this ->file_size= $upfile [ "size" ]; $this ->file_tmp_name= $upfile [ "tmp_name" ]; $this ->file_error= $upfile [ "error" ]; //检查文件类型是否符合 if (!in_array( $this ->file_type, $this ->uptype)){ $this ->file_up_info=2; return ; } //检查文件大小是否超出限制 if ( $this ->file_size> $this ->max_file_size){ $this ->file_up_info=3; return ; } //判断目录是否存在 if (! file_exists ( $this ->destination_folder)) mkdir ( $this ->destination_folder); //进一步取得图片的信息并赋值 $this ->img_size= getimagesize ( $this ->file_tmp_name); $pathinfo = pathinfo ( $this ->file_name); $this ->file_extension= $pathinfo [ "extension" ]; //获取文件扩展名 $this ->file_basename= $pathinfo [ "basename" ]; //获取带扩展名的全名 $this ->filename= $pathinfo [ "filename" ]; //文件名（不带扩展名) $filename2 = $pathinfo [ 'filename' ]; $this ->destination = $this ->destination_folder. $this ->filename. "." . $this ->file_extension; //判断文件名是否存在，如果存在则重命名 $n =1; while ( file_exists ( $this ->destination)){ while ( file_exists ( $this ->destination)){ $n ++; $this ->filename= $this ->filename. "(" . $n . ")" ; $this ->destination = $this ->destination_folder. $this ->filename. "." . $this ->file_extension; } $this ->filename= $filename2 . "(" . $n . ")" ; $this ->destination = $this ->destination_folder. $this ->filename. "." . $this ->file_extension; } //移动上传的文件 if (move_uploaded_file( $this ->file_tmp_name, $this ->destination)) $this ->file_up_info=0; else $this ->file_up_info=4; //添加水印 if ( $this ->watermark==1){ $this ->imgthu(); } //生成略缩图 if ( $this ->imgthu==1){ $this ->add_watermark(); } //生成预览图 if ( $this ->imgpreviewsize == 0){ if ( $this ->img_size[ "0" ]< $this ->imgwidth) $this ->imgwidth= $this ->img_size[ "0" ]; if ( $this ->img_size[ "1" ]< $this ->imgheight) $this ->imgheight= $this ->img_size[ "1" ]; } else { $this ->imgwidth= $this ->img_size[ "0" ]* $this ->imgpreviewsize; $this ->imgheight= $this ->img_size[ "1" ]* $this ->imgpreviewsize; } $this ->img_preview_display="<img src= '$this->destination' width= '$this->imgwidth' height= '$this->imgheight' alt= '图片预览：r文件名' ： $this ->file_tmp_name />"; } //==================================================================================================================== //==================================================================================================================== //生成略缩图功能 function imgthu(){ if ( $this ->imgthu_folder==null) $this ->imgthu_folder= $this ->destination_folder; //$this->imgthu_name=$this->filename."_t.".$this->file_extension; $imgthu_name_b = $this ->filename. "_t" ; $imgthu_name_b2 = $this ->filename. "_t" ; $destination_b = $this ->imgthu_folder. $imgthu_name_b . "." . $this ->file_extension; //判断文件名是否存在，如果存在则重命名 $n =1; while ( file_exists ( $destination_b )){ while ( file_exists ( $destination_b )){ $n ++; $imgthu_name_b = $imgthu_name_b . "(" . $n . ")" ; $destination_b = $this ->imgthu_folder. $imgthu_name_b . "." . $this ->file_extension; } $imgthu_name_b = $imgthu_name_b2 . "(" . $n . ")" ; $destination_b = $this ->imgthu_folder. $imgthu_name_b . "." . $this ->file_extension; } $imginfo = getimagesize ( $this ->destination); switch ( $imginfo [2]) { case 1: $in =@imagecreatefromgif( $this ->destination); break ; case 2: $in =@imagecreatefromjpeg( $this ->destination); break ; case 3: $in =@imagecreatefrompng( $this ->destination); break ; case 6: $in =@imagecreatefrombmp( $this ->destination); break ; default : break ; } //计算略缩图长宽 if ( $this ->imgthu_fixed==0){ if ( $this ->imgthu_height>( $imginfo [1]/ $imginfo [0])* $this ->imgthu_width) $this ->imgthu_width = ( $imginfo [0]/ $imginfo [1])* $this ->imgthu_height; else $this ->imgthu_height=( $imginfo [1]/ $imginfo [0])* $this ->imgthu_width; } $new = imageCreateTrueColor( $this ->imgthu_width, $this ->imgthu_height); ImageCopyResized( $new , $in ,0,0,0,0, $this ->imgthu_width, $this ->imgthu_height, $imginfo [0], $imginfo [1]); switch ( $imginfo [2]) { case 1: imagejpeg( $new , $destination_b ); break ; case 2: imagejpeg( $new , $destination_b ); break ; case 3: imagepng( $new , $destination_b ); break ; case 6: imagewbmp( $new , $destination_b ); break ; } } //==================================================================================================================== //==================================================================================================================== //添加水印功能 function add_watermark(){ //1 = GIF，2 = JPG，3 = PNG，4 = SWF，5 = PSD，6 = BMP，7 = TIFF(intel byte order)， //8 = TIFF(motorola byte order)，9 = JPC，10 = JP2，11 = JPX，12 = JB2，13 = SWC，14 = IFF，15 = WBMP，16 = XBM。 $imginfo = getimagesize ( $this ->destination); $im =imagecreatetruecolor( $this ->img_size[0], $this ->img_size[1]); //创建真彩色 $white =imagecolorallocate( $im ,255,255,255); //设置颜色 $black =imagecolorallocate( $im ,0,0,0); $red =imagecolorallocate( $im ,255,0,0); //在 image 图像的坐标 x，y（图像左上角为 0, 0）处用 color 颜色执行区域填充（即与 x, y 点颜色相同且相邻的点都会被填充）。 imagefill( $im ,0,0, $white ); switch ( $imginfo [2]) { case 1: $simage =imagecreatefromgif( $this ->destination); // 创建一个新的形象，从文件或 URL break ; case 2: $simage =imagecreatefromjpeg( $this ->destination); break ; case 3: $simage =imagecreatefrompng( $this ->destination); break ; case 6: $simage =imagecreatefromwbmp( $this ->destination); break ; default : echo ( "不支持的文件类型" ); break ; } if (! empty empty ( $simage )) { //位置设置 if ( $this ->watertype==1){ $str_len = strlen ( $this ->waterstring); $str_width = $str_len *10; $str_height =20; } elseif ( $this ->watertype==1 && file_exists ( $this ->waterimg)){ $iinfo = getimagesize ( $this ->waterimg); $str_width = $iinfo [0]; $str_height = $iinfo [1]; } switch ( $this ->waterposition){ case 1: $p_x =5; $p_y = $this ->img_size[1]- $str_height ; break ; case 2: $p_x = $this ->img_size[0]- $str_width ; $p_y = $this ->img_size[1]- $str_height ; break ; case 3: $p_x =5; $p_y =0; break ; case 4: $p_x = $this ->img_size[0]- $str_width ; $p_y =5; break ; case 5: $p_x =( $this ->img_size[0]- $str_width )/2; $p_y =( $this ->img_size[1]- $str_height )/2; break ; } imagecopy( $im , $simage ,0,0,0,0, $this ->img_size[0], $this ->img_size[1]); //拷贝图像的一部分 //imagefilledrectangle($im,1,$this->img_size[1]-15,130,$this->img_size[1],$white); //将图片的封闭长方形区域着色 switch ( $this ->watertype) { case 1: //加水印字符串 imagestring( $im ,10, $p_x , $p_y , $this ->waterstring, $red ); break ; case 2: //加水印图片 $simage1 =imagecreatefromgif( $this ->waterimg); imagecopy( $im , $simage1 ,0,0,0,0,85,15); imagedestroy( $simage1 ); break ; } switch ( $imginfo [2]) { case 1: //imagegif($nimage, $destination); imagejpeg( $im , $this ->destination); break ; case 2: imagejpeg( $im , $this ->destination); break ; case 3: imagepng( $im , $this ->destination); break ; //开源代码phpfensi测试数据 case 6: imagewbmp( $im , $this ->destination); break ; } //覆盖原上传文件 imagedestroy( $im ); imagedestroy( $simage ); } } } ?>查看更多关于php图片上传类,支持加水印,生成略缩图 - php类库的详细内容...
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