import chardet
import re

def detect_encoding(file_path):
    with open(file_path, 'rb') as f:
        raw_data = f.read()
    result = chardet.detect(raw_data)
    return result['encoding']

def extract_php_variables(file_path):
    encoding = detect_encoding(file_path)
    with open(file_path, 'r', encoding=encoding) as f:
        content = f.read()

    variables = re.findall(r'\$[a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff]*', content)
    unique_vars = sorted(set(variables))
    return unique_vars

# 使用例
php_file = 'OfficeChusenTourakuKakutei.php'
variables = extract_php_variables(php_file)
print("PHPファイル内の変数一覧:")
for var in variables:
    print(var)