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<?php
function img_thumb($imgfile, $imgthumb, $newwidth)
{
if (function_exists('imagecreate'))
{
$imginfo = getimagesize($imgfile);
if ($imginfo[2] > 3)
{
echo 'Недопустимый формат!';
exit;
}
if ($imginfo[2] == 1)
{
if (!function_exists("imagecreatefromgif"))
return $imgfile;
$srcImage = imagecreatefromgif($imgfile);
}
if ($imginfo[2] == 2)
{
if (!function_exists("imagecreatefromjpeg"))
return $imgfile;
$srcImage = imagecreatefromjpeg($imgfile);
}
if ($imginfo[2] == 3)
{
if (!function_exists("imagecreatefrompng"))
return $imgfile;
$srcImage = imagecreatefrompng($imgfile);
}
if ($srcImage)
{
$srcWidth = $imginfo[0];
$srcHeight = $imginfo[1];
$ratioWidth = $srcWidth / $newwidth;
$destWidth = $newwidth;
$destHeight = $srcHeight / $ratioWidth;
$destImage = imagecreatetruecolor($destWidth, $destHeight);
imagealphablending($destImage, true);
imagealphablending($srcImage, false);
imagecopyresized($destImage, $srcImage, 0, 0, 0, 0, $destWidth, $destHeight, $srcWidth, $srcHeight);
imagecopyresampled($destImage, $srcImage, 0, 0, 0, 0, $destWidth, $destHeight, $srcWidth, $srcHeight);
if ($imginfo[2] == 1)
imagegif($destImage, $imgthumb);
if ($imginfo[2] == 2)
imagejpeg($destImage, $imgthumb);
if ($imginfo[2] == 3)
imagepng($destImage, $imgthumb);
imagedestroy($srcImage);
imagedestroy($destImage);
return $imgthumb;
} else
{
return $imgfile;
}
} else
{
return $imgfile;
}
}
?>