$index = strrpos($_FILES["upload_file"]['name'], '.');
獲取文件名
$prefix = substr($_FILES["upload_file"]['name'], 0, $index);
獲取文件後綴
$suffix = substr($_FILES["upload_file"]['name'], $index);
$index = strrpos($_FILES["upload_file"]['name'], '.');
獲取文件名
$prefix = substr($_FILES["upload_file"]['name'], 0, $index);
獲取文件後綴
$suffix = substr($_FILES["upload_file"]['name'], $index);