regex matches numbers, but not letters
I have a string that looks like this:
[if-abc] 12345 [if-def] 67890 [/if][/if]
I have the following regex:
This matches the inner brackets just like I want it to. However, when I replace the 67890 with text (ie. abcdef), it doesn't match it.
[if-abc] 12345 [if-def] abcdef [/if][/if]
I want to be able to match ANY characters, including line breaks, except for another opening bracket [if-.
This part doesn't work like you think it does:
This will match a single character that is neither of [, i or f. Regardless of the combination. You can mimic the desired behavior using a negative lookahead though:
I've also included closing tags in the lookahead, as this avoid the ungreedy repetition (which is usually worse performance-wise). Plus, I've changed the delimiters, so that you don't have to escape the slash in the pattern.
So this is the interesting part ((?:(?!\[/?if).)*) explained:
( # capture the contents of the tag-pair (?: # start a non-capturing group (the ?: are just a performance # optimization). this group represents a single "allowed" character (?! # negative lookahead - makes sure that the next character does not mark # the start of either [if or [/if (the negative lookahead will cause # the entire pattern to fail if its contents match) \[/?if # match [if or [/if ) # end of lookahead . # consume/match any single character )* # end of group - repeat 0 or more times ) # end of capturing group