如何利用正则检测文本中是否包含不完整标记？-js教程-PHP中文网

不完整html标记指以或语法中途截断的标签。可通过四类正则模式检测：行末孤立

如何利用正则检测文本中是否包含不完整标记？

检测文本中是否包含不完整 HTML 标记（比如 <div>、<code><p class="</code">、<code><img src="xxx%20%E7%AD%89%E6%9C%AA%E9%97%AD%E5%90%88%E7%9A%84%E6%A0%87%E7%AD%BE%EF%BC%89%EF%BC%8C%E4%B8%8D%E8%83%BD%E9%9D%A0%E7%AE%80%E5%8D%95%E5%8C%B9%E9%85%8D%20<.*?>%20%E2%80%94%E2%80%94%20%E9%82%A3%E5%8F%AA%E4%BC%9A%E6%89%BE%E2%80%9C%E5%B7%B2%E9%97%AD%E5%90%88%E7%9A%84%E7%9F%AD%E6%A0%87%E7%AD%BE%E2%80%9D%EF%BC%8C%E5%8F%8D%E8%80%8C%E6%BC%8F%E6%8E%89%E7%9C%9F%E6%AD%A3%E6%9C%89%E9%97%AE%E9%A2%98%E7%9A%84%E7%89%87%E6%AE%B5%E3%80%82

%E5%85%B3%E9%94%AE%E5%9C%A8%E4%BA%8E%EF%BC%9A%E4%B8%8D%E5%AE%8C%E6%95%B4%E6%A0%87%E8%AE%B0%20=%20%E5%BC%80%E5%A7%8B%E5%B0%96%E6%8B%AC%E5%8F%B7%20<%20%E5%90%8E%E7%BC%BA%E5%B0%91%E5%AF%B9%E5%BA%94%E7%9A%84%E7%BB%93%E6%9D%9F%20>%EF%BC%8C%E6%88%96%E6%A0%87%E7%AD%BE%E8%AF%AD%E6%B3%95%E4%B8%AD%E9%80%94%E6%88%AA%E6%96%AD%E3%80%82%E6%AD%A3%E5%88%99%E8%99%BD%E4%B8%8D%E8%83%BD%E8%A7%A3%E6%9E%90%20HTML%20%E7%BB%93%E6%9E%84%EF%BC%8C%E4%BD%86%E5%8F%AF%E6%9C%89%E6%95%88%E8%AF%86%E5%88%AB%E5%B8%B8%E8%A7%81%E6%96%AD%E8%A3%82%E6%A8%A1%E5%BC%8F%E3%80%82

%E2%9C%85%20%E8%AF%86%E5%88%AB%E5%85%B8%E5%9E%8B%E4%B8%8D%E5%AE%8C%E6%95%B4%E6%A0%87%E8%AE%B0%E7%9A%84%E6%AD%A3%E5%88%99%E6%80%9D%E8%B7%AF

%E4%B8%8D%E5%AE%8C%E6%95%B4%E6%A0%87%E8%AE%B0%E5%BE%80%E5%BE%80%E8%A1%A8%E7%8E%B0%E4%B8%BA%E4%BB%A5%E4%B8%8B%E5%87%A0%E7%B1%BB%E7%89%B9%E5%BE%81%EF%BC%8C%E6%AF%8F%E7%B1%BB%E5%AF%B9%E5%BA%94%E4%B8%80%E4%B8%AA%E5%8F%AF%E8%90%BD%E5%9C%B0%E7%9A%84%E6%AD%A3%E5%88%99%E6%A3%80%E6%9F%A5%EF%BC%9A

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%E5%AD%A4%E7%AB%8B%E7%9A%84%E8%B5%B7%E5%A7%8B%20<%20%E5%90%8E%E6%97%A0%E5%8C%B9%E9%85%8D%20>%0A%EF%BC%88%E5%A6%82%E6%96%87%E6%9C%AC%E6%9C%AB%E5%B0%BE%E7%AA%81%E7%84%B6%E5%87%BA%E7%8E%B0%20<span%EF%BC%8C%E6%88%96%E6%8D%A2%E8%A1%8C%E5%90%8E%E5%8D%A1%E5%9C%A8%20<a%20href=%EF%BC%89%0A%E2%86%92%20%E5%8C%B9%E9%85%8D%EF%BC%9A<[%5E>]*%24%EF%BC%88%E8%A1%8C%E6%9C%AB%E4%BB%A5%20<%20%E5%BC%80%E5%A4%B4%E4%B8%94%E6%97%A0%20>%20%E7%BB%93%E6%9D%9F%EF%BC%89%0A%E2%86%92%20%E6%B3%A8%E6%84%8F%EF%BC%9A%E9%9C%80%E9%85%8D%E5%90%88%20re.MULTILINE%EF%BC%8C%E8%AE%A9%20%24%20%E5%8C%B9%E9%85%8D%E6%AF%8F%E8%A1%8C%E6%9C%AB%E5%B0%BE
%E6%A0%87%E7%AD%BE%E5%B1%9E%E6%80%A7%E5%80%BC%E6%9C%AA%E9%97%AD%E5%90%88%EF%BC%88%E5%BC%95%E5%8F%B7%E7%BC%BA%E5%A4%B1%EF%BC%89%0A%EF%BC%88%E5%A6%82%20<input%20value=" abc>、<code><div class='active）
→ 匹配双/单引号开头但未闭合：<[^>]*=["'> 或更稳写法：<br><code>]*?=["'][^"'>]*$
（排除闭合标签如

import re def has_incomplete_html_tag(text): # 多规则并行检查，任一命中即视为存在不完整标记 patterns = [ r']*$', # 行内以结尾 r']*?=["\'][^"\'>]*$', # 带未闭合引号的标签 r'\s]*$', # 标签名后直接结束 ] for pat in patterns: if re.search(pat, text, re.IGNORECASE | re.MULTILINE): return True return False # 测试 print(has_incomplete_html_tag('<div class="alert')) # True print(has_incomplete_html_tag('正常文本')) # False print(has_incomplete_html_tag('@@##@@Hello</p>')) # False