如何在PHP中将大写单词字符与正则表达式匹配？

Question

I know there is the [AZ] notation.. but I am not sure if [az] is the same as \\w .

I'd like to match \\w , but only if it's uppercase.

This should include all the weird characters like Ę, Ą, Ś, Ć, Ź, Ż, Ś, Ł, Ó, Ń .

Answer 1

You can use Unicode character properties . For example,

'/\p{Lu}/u'

Will match any uppercase letter.

Answer 2

\\w is equivalent of this character class:

[a-zA-Z0-9_]

If you want upper case unicode characters only then use this character class:

'/[\p{Lu}\p{N}_]/u'

This will match any one of:

1. Upper case unicode letter
2. unicode number
3. Underscore