PHP逻辑运算符匹配字符串

Question

I'm putting together a search form. I want to provide the user the option of searching with logical operators. Examples of search queries:

• red || ((green && pink))

• !red && !green

The data which is being searched is stored in an array. I have a few ways I can provide this functionality by chopping the search string up but I'm wondering if anyone knows of any modules which I could utilize before is start coding something from scratch?

I should also mention that I'm aware of security issues surrounding techniques but I'm not worried about SQL injections etc. as this tool isn't going to be on a public facing server.

Answer 1

Look into using a proper Lexer or PEG, such as php-peg or PHP_LexerGenerator, which allows you to generate code that parses and validates a grammar for such uses.

You might also want to look at tools like ANTLRWorks, helping debugging and creating grammars.