Question

In mysql boolean match, if no operators are present, OR is implied. If you want AND, you need to add + to each keywords.

So query “word1 word2” is equal to “word1 OR word2”, “+word1 +word2” is equal to “word1 AND word2”

I don’t want users to have to enter + before each keyword, what are my options?

Suggested option 1: Is there something in my.conf I can change to set the defaults (I didn’t find anything)

Suggested option 2: parse the query and manually add + to each word. Any simple code for this you can share?

The problem with this is if the user adds “quotes” or operators (+-*<>) etc. it breaks my parsing code.

Answer 1

I went with second suggestions on my site.

Simple one liner to add + before each word if you deal only with words, (not with quoted strings)

$q = implode(' ', array_map(create_function('$a', 'return "+".$a;'), preg_split('`\\s+`', $q))))

or even simpler regex replace doing the same:

echo preg_replace('`(\\W|^)\\w`', '\\1+\\2', $q);

if you have not only single words but also quoted phrases to search this should add + before each single unquoted word and each quoted string

echo preg_replace('`(\\s|^)(\\w|"[^"]+")`', '\\1+\\2', $q);