无变形缩略图生成程序 swin img class Ver 0.1(页 1) - 网站设计 - 设计动量论坛

ofly 发表于 2007-3-26 13:35

无变形缩略图生成程序 swin img class Ver 0.1

[quote]-h%YeU2RZxGpn"a
<?php D2O?EG$im0`-M;r
/*
*版权说明：该版本是在“IEB_UPLOAD CLASS Ver 1.1”的基础上二次开发的，原程序对 (d;Fu ^6W)iw.Cs
*图片的裁剪将使图片变形、失真！本人在该程序的基础上进行了更改，用数据参数与原图片
*文件参数(主要是指宽和高)进行对比，得出比例值，先生成与原图片同比例缩放的图片，然 DdN]NeV(J&a
*后再以该中间图中心开始截取，从而获得缩略图，当然，图片会被裁剪，但是是最小限度的
*裁剪！
*程序设计：swin.wang  Email: [email=php_in_china@yahoo.com.cn]php_in_china@yahoo.com.cn[/email] QQ:592298893 p3|;qA6h5j
* (V d|qu/|XQ
*该程序你可无限制使用，但请保留版权信息 i8v%?J(|Q
× ,vWcW{,Afm$i
×使用犯法：
*       $upfos = new ieb_upload('photo_file','./up_img'); photo_file 表单文件域名称，不要加$； ./up_img，上传位置
*       $old_file_name=$upfos -> getName(); Y/P1H(Y S{%Jh}
*       $old_file_fooder=$upfos -> getExt();
*       $file_size=$upfos -> getSize(); 1MiG$ck
*       $file_name=$upfos -> newName();
*       $upfos -> upload($file_name); F_+QR0O.M2bB
*       $upfos -> thumb("small_",125,120);
*       $new_file_name=$upfos -> UpFile(); $new_file_name 上传后大图名
×       $small_file_name="small_".$new_file_name;  $small_file_name 所略图名 +U.K:yz N
*/ sf!}]DD9_8m
class ieb_upload{ %M;A a]2kaH`
var $FormName; //文件域名称
var $Directroy; //上传至目录
var $MaxSize; //最大上传大小
var $CanUpload; //是否可以上传 lGz0NA%z E
var $doUpFile; //上传的文件名
var $sm_File; //缩略图名称
var $Error;  //错误参数 \ul(r u9X
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function ieb_upload($formName='', $dirPath='', $maxSize=2097152) //(1024*2)*1024=2097152 就是 2M /@]!^KD&`.x!Y
{ 6cl.i5of
  global $FormName, $Directroy, $MaxSize, $CanUpload, $Error, $doUpFile, $sm_File; zF6n4P!ov
  //初始化各种参数
  $FormName = $formName;
  $MaxSize = $maxSize;
  $CanUpload = true; Y7WvUyv
  $doUpFile = ''; s0Oy'X*ebW7A
  $sm_File = '';
  $Error = 0; Ios;z&E)|%F

  if ($formName == ''){
$CanUpload = false;
$Error = 1; NXswl
break;
} "?5r*IR?T

  if ($dirPath == ''){ i-L+`?3_&s|;tD|
$Directroy = $dirPath;
  }else{
$Directroy = $dirPath.'/';
  }
}

//检查文件是否存在 0D)o1\/Ek2Z
function scanFile()
{ xVZH8if
  global $FormName, $Error, $CanUpload; "RV_ I}8Q5K
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  if ($CanUpload){ (t*a&}#wZ[6o!D
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$scan = is_readable($_FILES[$FormName]['name']);

if ($scan){ al!xGg
$Error = 2; u/tl+I|2o
}
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return $scan; d.Fu#uxy
  } -}c$n/z^y
}

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//获取文件大小 #U vLI+YC~
function getSize($format = 'B') iM,xkI
{ LtY9nBW
  global $FormName, $Error, $CanUpload;
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  if ($CanUpload){ ;lR5UyX O9?
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if ($_FILES[$FormName]['size'] == 0){
$Error = 3;
$CanUpload = false; Kkp| U%wE
}
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switch ($format){ ;zD {:Ko\%cb
case 'B': t[Yw g;z b.^
return $_FILES[$FormName]['size']; };MRY9C@h
break;

case 'M': zNV,M-M8DVp_gO
return ($_FILES[$FormName]['size'])/(1024*1024);
}

  }
}
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//获取文件类型
function getExt()
{
  global $FormName, $Error, $CanUpload;

  if ($CanUpload){ J3n&`3Ac C
$ext=$_FILES[$FormName]['name'];
$extStr=explode('.',$ext);
$count=count($extStr)-1; o]U(m*?\ }"Y
  } 0mNN'o*bcl
  return $extStr[$count]; ;oxo.m9r
}
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//获取文件名称
function getName()
{ 2Vku WMb`B
  global $FormName, $CanUpload; hr!d f3O?9q]

  if ($CanUpload){ 2Z)q,EN.j%cP
return $_FILES[$FormName]['name']; ,T+U!`#e!nt,R
  } 2gH;RE:j} N
}
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//新建文件名
function newName()
{ TN W)mS6Dsj_5l]
  global $CanUpload, $FormName;

  if ($CanUpload){ MxJ9P:MEn2F
$FullName=$_FILES[$FormName]['name'];
$extStr=explode('.',$FullName); h,t Ei3A!R,Y/`
$count=count($extStr)-1; +m)P)V&~p$q q
$ext = $extStr[$count];

return date('YmdHis').rand(0,9).'.'.$ext;
  } "c1GBTg}#U0O"[
}

//上传文件
function upload($fileName = '') uOO.M?/J q+U$X
{ j l J0HL
  global $FormName, $Directroy, $CanUpload, $Error, $doUpFile;

  if ($CanUpload){
if ($_FILES[$FormName]['size'] == 0){
$Error = 3;
$CanUpload = false; Rl^Dy5G;m*rw
return $Error;
break;
} r3]f z0cd.`1w7L
  } o1hh O[
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  if($CanUpload){ nF|RKvq a9g
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if ($fileName == ''){
$fileName = $_FILES[$FormName]['name'];
}

$doUpload=@copy($_FILES[$FormName]['tmp_name'], $Directroy.$fileName);
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if($doUpload)
{
$doUpFile = $fileName;
chmod($Directroy.$fileName, 0777); `;[?9z#Nz
return true; 2J0t3Nw;nYu3cO
}else{
$Error = 4;
return $Error; !b h2b+Rp8{E
}
  }
}
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//创建图片缩略图 9L0~q ?'y:i%{?l%L
function thumb($dscChar='',$width=160,$height=120)
{
  global $CanUpload, $Error, $Directroy, $doUpFile, $sm_File;
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  if ($CanUpload && $doUpFile != ''){
$srcFile = $doUpFile; 5S&E4atSh&]5W8t

if ($dscChar == ''){
$dscChar = 'sm_'; "P5HirjgPF Z$[W
}

$dscFile = $Directroy.$dscChar.$srcFile; 7|1DnK5}D
$data = getimagesize($Directroy.$srcFile,&$info);
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switch ($data[2]) {
case 1: J2A@jH F+y8A4_
$im = @imagecreatefromgif($Directroy.$srcFile);
break; 7bfJZm
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case 2:
$im = @imagecreatefromjpeg($Directroy.$srcFile); 4N*yG3iF3l@Tb
break; +?%X#`)a0L
_,e0YD'l$a5D`\}
case 3:
$im = @imagecreatefrompng($Directroy.$srcFile); {AG$i6]$]$Vf(Nz0R
break;
}
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$srcW=imagesx($im);
$srcH=imagesy($im);

if(($srcW/$width)>=($srcH/$height)){
            $temp_height=$height; lw,L?'p~)n.V|
            $temp_width=$srcW/($srcH/$height);
            $src_X=abs(($width-$temp_width)/2); O/c|o$kI n?%o
            $src_Y=0; 4r{Nyxf
      } eT0a2V_#R,Yw
      else{ 2Wue2nZ%?Wo.o
            $temp_width=$width;
            $temp_height=$srcH/($srcW/$width); b~4Jghw
            $src_X=0; B+R?W#MN
            $src_Y=abs(($height-$temp_height)/2);
            } 9O1~8I'X1c4~
      $temp_img=imagecreatetruecolor($temp_width,$temp_height); !Rv(ug7e0n VQL
      imagecopyresized($temp_img,$im,0,0,0,0,$temp_width,$temp_height,$srcW,$srcH); 2L8om9L7\6h4Xs
      B7Z"u)NF.nlW
      !J+Xd6W#R%u1^
      $ni=imagecreatetruecolor($width,$height); &}f:}e2[,q"jtp0X(Y
      imagecopyresized($ni,$temp_img,0,0,$src_X,$src_Y,$width,$height,$width,$height); cA$_G+B4h'J
      $cr = imagejpeg($ni,$dscFile); t*|S)i@
         chmod($dscFile, 0777);

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if ($cr){ #l!i/^;FO_]
$sm_File = $dscFile; REk2u D{0z6M/f8}
return true; tOM v3^W @B?-d
}else{ j'M k$k:]j!E
$Error = 5; T E-QKcmL4ix
return $Error;
}
  }
} vCC0a5G&g;R*n8r

//显示错误参数
function Err(){ %`7S;HK:r!R5a
  global $Error;
  return $Error;
}
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//上传后的文件名 m#V9QF!F'o"{1T|~
function UpFile(){
  global $doUpFile, $Error;
  if ($doUpFile != ''){ .s;ff"?S_
return $doUpFile; /zUHAYXj!c,xM!Y
  }else{
$Error = 6;
  }
} p"lK oe@X2U

//上传文件的路径 }&GsjdUCx
function filePath(){
  global $Directroy, $doUpFile, $Error; p)m-Z}m4o;}Y
  if ($doUpFile != ''){
return $Directroy.$doUpFile; g.Q4I/D4uN$h
  }else{
$Error = 6;
  }
} I6x!s2qp4RA
!jG)B V+JO}
//缩略图文件名称
function thumbMap(){ R lG!z`)~
  global $sm_File, $Error;
  if ($sm_File != ''){ ^``2\ANP
return $sm_File; Wu$@4r_'`
  }else{
$Error = 6;
  } %Pu$T#n7MHF
} ?YFcq$~N V?

//显示版本信息 ]h:cpm
function ieb_version(){
  return 'swin img class Ver 0.1'; 8{|j1_RLn
} Zok$YEGjW
}
?> _,?zP:l3?
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无变形缩略图生成程序 swin img class Ver 0.1