CODEWITHSUNDEEP
phpregexreplace
Boris Kozarac
Boris Kozarac

Reputation: 635

Replace a string under condition (Regex?)

I am looking for a solution for search and replace. I would need to add an empty space after specific string BUT only if there isn't one already. Regular expressions are to advanced for me. Anyone wants to help me out?

For example 

Lorem ipsum[something]abcdefg[/something]dolor sit amet

Needs to be replace with 

Lorem ipsum[something]abcdefg[/something] dolor sit amet

So, I need to search for [/something] and if it is not followed by space, then do the replace...

Upvotes: 2

Views: 76

Answers (1)

Marcos Pérez Gude
Marcos Pérez Gude

Reputation: 22158

The regular expression can be this:

/(\[\/something\])(?!\s)/gmi

You can test it and know the whole explanation here:

https://regex101.com/r/pC4pQ3/1

If you see the first is targetted because is not an space, but the second is the opposite.

To apply this in PHP you must to use preg_replace(). Something like this:

$string = "Lorem ipsum[something]abcdefg[/something]dolor sit amet";
echo preg_replace("/(\[\/something\])(?!\s)/", "\1 ", $string);
// result: "Lorem ipsum[something]abcdefg[/something] dolor sit amet"

Upvotes: 2

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