Code for generating thumbnails in PHP with good compatibility_PHP tutorial

Copy code The code is as follows:

function ImageResize($srcFile,$toW,$toH,$toFile="")
{
if($toFile==""){ $toFile = $srcFile; }
$info = "";
$data = GetImageSize($srcFile,$info);
switch ( $data[2])
{
case 1:
if(!function_exists("imagecreatefromgif")){
echo "Your GD library cannot use GIF format images, please use Jpeg or PNG format! Return";
exit();
}
$im = ImageCreateFromGIF($srcFile) ;
break;
case 2:
if(!function_exists("imagecreatefromjpeg")){
echo "Your GD library cannot use images in jpeg format, please use images in other formats!< ;a href='javascript:go(-1);'>return";
exit();
}
$im = ImageCreateFromJpeg($srcFile);
break;
case 3:
$im = ImageCreateFromPNG($srcFile);
break;
}
$srcW=ImageSX($im);
$srcH=ImageSY($ im);
$toWH=$toW/$toH;
$srcWH=$srcW/$srcH;
if($toWH<=$srcWH){
$ftoW=$toW;
$ftoH=$ftoW*($srcH/$srcW);
}
else{
$ftoH=$toH;
$ftoW=$ftoH*($srcW/$srcH) ;
}
if($srcW>$toW||$srcH>$toH)
{
if(function_exists("imagecreatetruecolor")){
@$ni = ImageCreateTrueColor($ ftoW,$ftoH);
if($ni) ImageCopyResampled($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);
else{
$ni=ImageCreate($ftoW,$ftoH);
ImageCopyResized($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);
}
}else{
$ni=ImageCreate($ftoW,$ftoH);
ImageCopyResized($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH );
}
if(function_exists('imagejpeg')) ImageJpeg($ni,$toFile);
else ImagePNG($ni,$toFile);
ImageDestroy($ni);
}
ImageDestroy($im);
}

http://www.bkjia.com/PHPjc/322863.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/322863.htmlTechArticleCopy the code The code is as follows: function ImageResize($srcFile,$toW,$toH,$toFile="") { if($toFile==""){ $toFile = $srcFile; } $info = ""; $data = GetImageSize($srcFile,$info); switch ($d...