Question

I have a string like this

ch:keyword
ch:test
ch:some_text

I need a regular expression which will match all of the strings, however, it must not match the following:

ch: (ch: is proceeded by a space, or any number of spaces)
ch: (ch: is proceeded by nothing)

I am able to deduce the length of the string with the ‘ch:’ in it.
Any help would be appreciated; I am using PHP’s preg_match()

Edit: I have tried this:

preg_match("/^ch:[A-Za-z_0-9]/", $str, $matches)

However, this only matches 1 character after the string. I tried putting a * after the closing square bracket, but this matches spaces, which I don’t want.

Answer 1

preg_match('/^ch:(\S+)/', $string, $matches);
print_r($matches);

\S+ is for matching 1 or more non-space characters. This should work for you.