我有这个扩展检查器:
$upload_name = "file";
$max_file_size_in_bytes = 8388608;
$extension_whitelist = array("jpg", "gif", "png", "jpeg");
/* checking extensions */
$path_info = pathinfo($_FILES[$upload_name]['name']);
$file_extension = $path_info["extension"];
$is_valid_extension = false;
foreach ($extension_whitelist as $extension) {
if (strcasecmp($file_extension, $extension) == 0) {
$is_valid_extension = true;
break;
}
}
if (!$is_valid_extension) {
echo "{";
echo "error: 'ext not allowed!'\n";
echo "}";
exit(0);
}
然后我补充说:
if (exif_imagetype($_FILES[$upload_name]['name']) != IMAGETYPE_GIF
OR exif_imagetype($_FILES[$upload_name]['name']) != IMAGETYPE_JPEG
OR exif_imagetype($_FILES[$upload_name]['name']) != IMAGETYPE_PNG) {
echo "{";
echo "error: 'This is no photo..'\n";
echo "}";
exit(0);
}
当我将其添加到我的imageupload函数时,该函数停止工作。我没有得到任何错误,甚至不是我自己制作的“这不是照片”,可能是什么错误?
刚与我的主人核对过。它们支持exif_imagetype()
函数答案 0 :(得分:7)
以下是交换机用法的示例:
switch(exif_imagetype($_FILES[$upload_name]['name'])) {
case IMAGETYPE_GIF:
case IMAGETYPE_JPEG:
case IMAGETYPE_PNG:
break;
default:
echo "{";
echo "error: 'This is no photo..'\n";
echo "}";
exit(0);
}
您的脚本也可以使用,但您必须在条件之间放置AND:
if (exif_imagetype($_FILES[$upload_name]['name']) != IMAGETYPE_GIF
AND exif_imagetype($_FILES[$upload_name]['name']) != IMAGETYPE_JPEG
AND exif_imagetype($_FILES[$upload_name]['name']) != IMAGETYPE_PNG) {
echo "{";
echo "error: 'This is no photo..'\n";
echo "}";
exit(0);
}
答案 1 :(得分:0)
有一种更好,更短的方式来获取我正在使用的图像类型(不能确定它是否可行,因为它没有在PHP.net中记录,因为image_type_to_mime_type()也可以采用整数作为输入):
function get_image_type( $image_path_or_resource ) {
$img = getimagesize( $image_path_or_resource );
if ( !empty( $img[2] ) ) // returns an integer code
return image_type_to_mime_type( $img[2] );
return false;
}
echo get_image_type( 'somefile.gif' );
// image/gif
echo get_image_type( 'path/someotherfile.jpg' );
// image/jpeg
$image = get_image_type( 'somefile.gif' );
if ( !empty( $image ) ){
// fine, let's do some more coding
} else {
// bad image :(
}
答案 2 :(得分:0)
checked
你可以这样使用。希望这会有所帮助