extract values from a query regex - php

Question

I need to extract the values ​​of a condition (WHERE) and did a regex, but I can not get the values ​​correctly.
//Patherns
$regex = "/([a-zA-Z_]+)\s([\<\=\>\s]{0,4})\s+(\".*\")/";
//values ​​to be extracted
$string = 'idCidade >= "bla" OR idEstado="2" and idPais="3"';
//regex function
preg_match_all(
$regex,
$string,
$output
);
//displays the result
echo '<pre>';print_r($output);
//incorrect output
Array
(
[0] => Array
(
[0] => idCidade >= "bla" OR idEstado="2" and idPais="3"
)
[1] => Array
(
[0] => idCidade
)
[2] => Array
(
[0] => >=
)
[3] => Array
(
[0] => "bla" OR idEstado="2" and idPais="3"
)
)
I need the regular expression to export the values ​​to an array like this;
//correct output
Array
(
[0] => Array
(
[0] => idCidade >= "bla" OR idEstado="2" and idPais="3"
)
[1] => Array
(
[0] => idCidade
[1] => idEstado
[2] => idPais
)
[2] => Array
(
[0] => >=
[1] => =
[2] => =
)
[3] => Array
(
[0] => "bla"
[1] => "2"
[2] => "3"
)
[4] => Array
(
[0] => "OR"
[1] => "AND"
[2] => ""
)
)

Answer 1

Your mistake was probably the .* which matches too much. You'd need to make it "ungreedy" with appending a question mark: .*?
I would however suggest this regex:
'/(OR|AND)?\s*(\w+)\s*([<=>!]+)\s*("[^"]*"|\'[^\']*\'|\d+)/i'
This matches the boolean connector first and optionally, so that you get:
[1] => Array
(
[0] =>
[1] => OR
[2] => and
)
[2] => Array
(
[0] => idCidade
[1] => idEstado
[2] => idPais
)
[3] => Array
(
[0] => >=
[1] => =
[2] => =
)
[4] => Array
(
[0] => "bla"
[1] => "2"
[2] => "3"
)
I've also made it work for SQL-compliant strings and decimals. But this is only borderline a job for regex. A real parser would be advisable. (Though I don't know your use case.)

Answer 2

Try this. This outputs the exact result you need.
<?php //Patherns
$regex = '/([a-zA-Z_]+)\s*([>=<]*)\s*"([^"]*)"\s*(or|and)*/i';
//values to be extracted
$string = 'idCidade >= "bla" OR idEstado="2" and idPais="3"';
//regex function
preg_match_all(
$regex,
$string,
$output
);
//displays the result
echo '<pre>';print_r($output);