复制001if(! function_exists(ImageResize))002{003functionImageResize($srcFile,$toW,$toH,$toFile=“”)004{005global $cfg_photo_type;006if($toFile==“”)007{008
$toFile=$srcFile;009}010
$info=“”;011
$srcInfo=GetImageSize($srcFile,$info);012switch($srcInfo[2])013{014case1:015if(!$cfg_photo_type[gif])016{017returnfalse;018}019
$im=imagecreatefromgif($srcFile);020break;021case2:022if(!$cfg_photo_type[jpeg])023{024returnfalse;025}026
$im=imagecreatefromjpeg($srcFile);027break;028case3:029if(!$cfg_photo_type[png])030{031returnfalse;032}033
$im=imagecreatefrompng($srcFile);034break;035case6:036if(!$cfg_photo_type[bmp])037{038returnfalse;039}040
$im=imagecreatefromwbmp($srcFile);041break;042}043
$srcW=ImageSX($im);044
$srcH=ImageSY($im);045if($srcW<=$toW && $srcH<=$toH )046{047returntrue;048}049//缩略生成并裁剪050
$newW=$toH * $srcW / $srcH;051
$newH=$toW * $srcH / $srcW;052if($newH >=$toH)053{054
$ftoW=$toW;055
$ftoH=$newH;056}057else058{059
$ftoW=$newW;060
$ftoH=$toH;061}062if($srcW>$toW||$srcH>$toH)063{064if(function_exists(“imagecreatetruecolor”))065{066@$ni=imagecreatetruecolor($ftoW,$ftoH);067if($ni)068{069
imagecopyresampled($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);070}071else072{073
$ni=imagecreate($ftoW,$ftoH);074
imagecopyresized($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);075}076}077else078{079
$ni=imagecreate($ftoW,$ftoH);080
imagecopyresized($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);081}082//裁剪图片成标准缩略图083
$new_imgx=imagecreatetruecolor($toW,$toH);084if($newH >=$toH)085{086
imagecopyresampled($new_imgx,$ni,0,0,0,($newH – $toH)/2,$toW,$toH,$toW,$toH);087}088else089{090
imagecopyresampled($new_imgx,$ni,0,0,($newW – $toW)/2,0,$toW,$toH,$toW,$toH);091}092switch($srcInfo[2])093{094case1:095
imagegif($new_imgx,$toFile);096break;097case2:098
imagejpeg($new_imgx,$toFile,85);099break;100case3:101
imagepng($new_imgx,$toFile);102break;103case6:104
imagebmp($new_imgx,$toFile);105break;106default:107returnfalse;108}109
imagedestroy($new_imgx);110
imagedestroy($ni);111}112
imagedestroy($im);113returntrue;114}115}
