PHP安全上传图片的方法

这段代码用于上传图片，可以根据图片类型检测图片是否安全，不是简单的检测扩展名

<&＃63;php // upload.php
echo <<<_END


Select a JPG, GIF, PNG or TIF File:


_END;
if ($_FILES)
{
$name = $_FILES['filename']['name'];
switch($_FILES['filename']['type'])
{
case 'image/jpeg': $ext = 'jpg'; break;
case 'image/gif': $ext = 'gif'; break;
case 'image/png': $ext = 'png'; break;
case 'image/tiff': $ext = 'tif'; break;
default: $ext = ''; break;
}
if ($ext)
{
$n = "image.$ext";
move_uploaded_file($_FILES['filename']['tmp_name'], $n);
echo "Uploaded image '$name' as '$n':
";
echo "";
}
else echo "'$name' is not an accepted image file";
}
else echo "No image has been uploaded";
echo "";
&＃63;>

希望本文所述对大家的php程序设计有所帮助。