Php 用正则表达式找到相反的结果

我有这个代码，它工作得很好

$match = false;
$string = 'The thing is S25697 and blue';
$reg_exp = '^The thing is.*(S\d).*(blue|red)';
$match = @preg_match("/$reg_exp/iu", $string);
if ($match) echo "found";
else echo "not found";

这个正则表达式给出了以下结果

$string = 'The thing is S25697 and blue'; #<--$match = true
$string = 'The thing is S2w697 and green'; #<--$match = false
$string = 'The thing is S2e697 and yellow'; #<--$match = false
$string = 'The thing is S2b697 and pink'; #<--$match = false
$string = 'The thing is S256b7 and red'; #<--$match = true

但结果是“发现”了使用

^The thing is.*\b(S\d)(?!.*\b(?:blue|red)\b)

看

解释

                         EXPLANATION
--------------------------------------------------------------------------------
  ^                        the beginning of the string
--------------------------------------------------------------------------------
  The thing is             'The thing is'
--------------------------------------------------------------------------------
  .*                       any character except \n (0 or more times
                           (matching the most amount possible))
--------------------------------------------------------------------------------
  \b                       the boundary between a word char (\w) and
                           something that is not a word char
--------------------------------------------------------------------------------
  (                        group and capture to \1:
--------------------------------------------------------------------------------
    S                        'S'
--------------------------------------------------------------------------------
    \d                       digits (0-9)
--------------------------------------------------------------------------------
  )                        end of \1
--------------------------------------------------------------------------------
  (?!                      look ahead to see if there is not:
--------------------------------------------------------------------------------
    .*                       any character except \n (0 or more times
                             (matching the most amount possible))
--------------------------------------------------------------------------------
    \b                       the boundary between a word char (\w)
                             and something that is not a word char
--------------------------------------------------------------------------------
    (?:                      group, but do not capture:
--------------------------------------------------------------------------------
      blue                     'blue'
--------------------------------------------------------------------------------
     |                        OR
--------------------------------------------------------------------------------
      red                      'red'
--------------------------------------------------------------------------------
    )                        end of grouping
--------------------------------------------------------------------------------
    \b                       the boundary between a word char (\w)
                             and something that is not a word char
--------------------------------------------------------------------------------
  )                        end of look-ahead

使用

看

解释

                         EXPLANATION
--------------------------------------------------------------------------------
  ^                        the beginning of the string
--------------------------------------------------------------------------------
  The thing is             'The thing is'
--------------------------------------------------------------------------------
  .*                       any character except \n (0 or more times
                           (matching the most amount possible))
--------------------------------------------------------------------------------
  \b                       the boundary between a word char (\w) and
                           something that is not a word char
--------------------------------------------------------------------------------
  (                        group and capture to \1:
--------------------------------------------------------------------------------
    S                        'S'
--------------------------------------------------------------------------------
    \d                       digits (0-9)
--------------------------------------------------------------------------------
  )                        end of \1
--------------------------------------------------------------------------------
  (?!                      look ahead to see if there is not:
--------------------------------------------------------------------------------
    .*                       any character except \n (0 or more times
                             (matching the most amount possible))
--------------------------------------------------------------------------------
    \b                       the boundary between a word char (\w)
                             and something that is not a word char
--------------------------------------------------------------------------------
    (?:                      group, but do not capture:
--------------------------------------------------------------------------------
      blue                     'blue'
--------------------------------------------------------------------------------
     |                        OR
--------------------------------------------------------------------------------
      red                      'red'
--------------------------------------------------------------------------------
    )                        end of grouping
--------------------------------------------------------------------------------
    \b                       the boundary between a word char (\w)
                             and something that is not a word char
--------------------------------------------------------------------------------
  )                        end of look-ahead

---

if NOT match

if（！$match）

有什么问题吗？你想实现什么？从字符串中提取

S\d

，并匹配末尾的颜色？那么，您是否正在尝试检索

S2w697

和

green

？还是只拿整根绳子？不清楚。在任何情况下，您都可以将

（*SKIP）（*FAIL）|+

附加到正则表达式的末尾，以获取与当前模式不匹配的内容。if$match在代码中是固定的。这是无法改变的。我有一个包含1000个条目的文件。从这里，我搜索所有条目，就像在我的正则表达式中一样（S\d是因为这部分在这两者之间总是不同的）。我也总是有不同的颜色。对于第二个正则表达式，我现在正在寻找与第一个正则表达式相同的值，但没有这两个值colors@Koda因此，为了澄清，您希望提取

S2w697

和

绿色

？所有的字符串都以颜色结尾吗？我只想知道我的字符串的结构是否像正则表达式一样，在第二次运行时，我想知道哪些字符串的结构完全是那样的，但不包含这两种颜色。“^问题是。*（S\d）。*”应始终选中。你在我的第一篇文章中看到了我的两个目标的示例（很抱歉我的英语不好）。如果不匹配

if（！$match）

，有什么问题吗？你想实现什么？从字符串中提取

S\d

，并匹配末尾的颜色？那么，您是否正在尝试检索

S2w697

和

green

？还是只拿整根绳子？不清楚。在任何情况下，您都可以将

（*SKIP）（*FAIL）|+

附加到正则表达式的末尾，以获取与当前模式不匹配的内容。if$match在代码中是固定的。这是无法改变的。我有一个包含1000个条目的文件。从这里，我搜索所有条目，就像在我的正则表达式中一样（S\d是因为这部分在这两者之间总是不同的）。我也总是有不同的颜色。对于第二个正则表达式，我现在正在寻找与第一个正则表达式相同的值，但没有这两个值colors@Koda因此，为了澄清，您希望提取

S2w697

和

绿色

？所有的字符串都以颜色结尾吗？我只想知道我的字符串的结构是否像正则表达式一样，在第二次运行时，我想知道哪些字符串的结构完全是那样的，但不包含这两种颜色。“^问题是。*（S\d）。*”应始终选中。你可以在我的第一篇文章中看到我的两个目标示例（很抱歉我的英语不好）

                         EXPLANATION
--------------------------------------------------------------------------------
  ^                        the beginning of the string
--------------------------------------------------------------------------------
  The thing is             'The thing is'
--------------------------------------------------------------------------------
  .*                       any character except \n (0 or more times
                           (matching the most amount possible))
--------------------------------------------------------------------------------
  \b                       the boundary between a word char (\w) and
                           something that is not a word char
--------------------------------------------------------------------------------
  (                        group and capture to \1:
--------------------------------------------------------------------------------
    S                        'S'
--------------------------------------------------------------------------------
    \d                       digits (0-9)
--------------------------------------------------------------------------------
  )                        end of \1
--------------------------------------------------------------------------------
  (?!                      look ahead to see if there is not:
--------------------------------------------------------------------------------
    .*                       any character except \n (0 or more times
                             (matching the most amount possible))
--------------------------------------------------------------------------------
    \b                       the boundary between a word char (\w)
                             and something that is not a word char
--------------------------------------------------------------------------------
    (?:                      group, but do not capture:
--------------------------------------------------------------------------------
      blue                     'blue'
--------------------------------------------------------------------------------
     |                        OR
--------------------------------------------------------------------------------
      red                      'red'
--------------------------------------------------------------------------------
    )                        end of grouping
--------------------------------------------------------------------------------
    \b                       the boundary between a word char (\w)
                             and something that is not a word char
--------------------------------------------------------------------------------
  )                        end of look-ahead