Find Logic from String using Regex-CodePudding

i want to get logic from string that what from input string. For example: Input:

pageType == "static" OR pageType == "item" AND pageRef == "index"

How to i get logic like:

0 => pageType == "static"
1 => pageType == "item"
2 => pageRef == "index"

The logic clause must be complete based on what is entered.

I place like this:

$input = 'pageType == "static" OR pageType == "item" AND pageRef == "index"';
preg_match_all('/(. )(?!AND|OR)(. )/s', $input, $loX);
var_dump($loX);

but the array just show:

0 => pageType == "static" OR pageType == "item" AND pageRef == "index"
1 => pageType == "static" OR pageType == "item" AND pageRef == "index
2 => "

Please help me, thanks ^_^

CodePudding user response：

One option is to make use of the \G anchor and a capture group:

\G(\w \h*==\h*"[^"]*")(?:\h (?:OR|AND)\h |$)

The pattern matches:

\G Get continuous matches asserting the position at the end of the previous match from the start of the string
(\w \h*==\h*"[^"]*") Match 1 word characters == and the value between double quotes
(?: Non capture group for the alternatives
- \h (?:OR|AND)\h Match either OR or AND between spaces
- | Or
- $ Assert the end of the string
) Close the group

Regex demo | Php demo

$re = '/\G(\w \h*==\h*"[^"]*")(?:\h (?:OR|AND)\h |$)/';
$str = 'pageType == "static" OR pageType == "item" AND pageRef == "index"';
preg_match_all($re, $str, $matches);
print_r($matches[1]);

Output

Array
(
    [0] => pageType == "static"
    [1] => pageType == "item"
    [2] => pageRef == "index"
)

Another option to get the results is to split on the AND or OR surrounded by spaces:

$result = preg_split('/\h (?:OR|AND)\h /', $str);