带有 Unicode 字符的正则表达式

Question

I need help with a regular expression, I need to catch the characters 🥇, ⚡,❓ and others in a string. If this character is at the beginning of the line and without a space, insert a space on the right, if the character is at the end of the line and without a space in front of it, insert a space on the left. And if the character is in the middle of the line without spaces, insert spaces on the left and right. So far, all I can do is get the character itself ' /[\x{000ff}-\x{fffff}]/u '

Answer 1

Right, it's lengthy but I interpreted your question as such:

• Keep leading/trailing spaces intact;
• Keep consecutive emoticons intact.

Therefor, try:

(?:(?<![\x{000ff}-\x{fffff}\s]|^)(?=[\x{000ff}-\x{fffff}])|(?<=[\x{000ff}-\x{fffff}])(?!$|[\x{000ff}-\x{fffff}\s]))

See an online demo

It's lengthy, but it's basically an non-capture group which holds two alternatives;

• Match a position that is not preceded by emoticon, start-line or space but is followed by emoticon;
• Match a position that is not followed by emoticon, end-line or space but is preceded by emoticon.