Question

我正在尝试编写一个regualr表达式来匹配无效的url模式

我想匹配以下模式：

/article/test-string/

以上是无效的网址，但以下是有效的

/article/abc/test-string/ and /article/xyz/abc/test-string/

我希望匹配文章斜杠后只有一个值的那些。请帮助，我正在尝试使用以下，但它匹配所有：

/article/(.*)/$

Answer 1

.*匹配任何字符的0个或更多，因此/article/(.*)/$将匹配其中包含/article/的所有URI。

您可以使用此正则表达式仅在/article/之后验证一个非斜杠组件：

$re = '~^/article/[^/]*/$~';

[^/]*＃匹配任何不是/
/$＃匹配最后的/
~用作正则表达式分隔符，以避免转义/

Answer 2


~^/article/(.*)+/(.*)/$~gm
^ assert position at start of a line
/article/ matches the characters /article/ literally (case sensitive)
1st Capturing group (.*)+
Quantifier: + Between one and unlimited times, as many times as possible, giving back as needed [greedy]
Note: A repeated capturing group will only capture the last iteration. Put a capturing group around the repeated group to capture all iterations or use a non-capturing group instead if you're not interested in the data
.* matches any character (except newline)
Quantifier: * Between zero and unlimited times, as many times as possible, giving back as needed [greedy]
/ matches the character / literally
2nd Capturing group (.*)
Quantifier: * Between zero and unlimited times, as many times as possible, giving back as needed [greedy]
Note: A repeated capturing group will only capture the last iteration. Put a capturing group around the repeated group to capture all iterations or use a non-capturing group instead if you're not interested in the data
.* matches any character (except newline)
Quantifier: * Between zero and unlimited times, as many times as possible, giving back as needed [greedy]
/ matches the character / literally
$ assert position at end of a line
g modifier: global. All matches (don't return on first match)
m modifier: multi-line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)

$re = "~^/article/(.*)+/(.*)/$~m"; 
$str = "/article/xyz/abc/test-string/\n/article/test-string/"; 

preg_match_all($re, $str, $matches);

来源https://regex101.com/

检查url斜杠计数模式

2 个答案: