从字符串中查找具有数字的特定单词

I want to get a specific word with number from a string for example

ABC312 is the string I want to filter...

or

ABC 312 is the string I want to filter...

Fromt eh above string I want to get "ABC" with following "312" (In the above string ABC will always remain same, it can be case-insensitive but the number will change...) it can be ABC143, ABC001, ABC311, ABC145 etc..

preg_match( '/ABC\s*[0-9]+/' );