Regex match - can't work it out - php

Question

I've got a string that I need to parse into an array in PHP. The string looks something like this:
(Key: ALL_HTTP)(Value:HTTP_HOST:10.1.1.1 )(Key: ALL_RAW)(Value:Host: 10.1.1.1:80 )(Key: APPL_MD_PATH)(Value:/ROOT)(Key: AUTH_TYPE)(Value:)(Key: AUTH_USER)(Value:)(Key: AUTH_PASSWORD)(Value:)(Key: LOGON_USER)(Value:)(Key: REMOTE_USER)(Value:)
The number of "key/value" pairs could be unlimited but is usually about 30-40 per string.
I've been playing with preg_match and a variation of an example from PHP.net - something like this:
preg_match('/(\S+): (\S+)/', $string, $result);
That gets me back the first key as $result[0] but doesn't help for the rest.
If anyone could help me with a proper expression that would be fantastic. I'd also appreciate any good reading resources for splitting strings with PCRE.
Thanks all!

Answer 1

Try something along the lines of
preg_match_all('/\(([^:)]+):\s*([^)]*)\)/',
"(Key: ALL_HTTP)(Value:HTTP_HOST:10.1.1.1 )(Key: ALL_RAW)(Value:Host: 10.1.1.1:80 )(Key: APPL_MD_PATH)(Value:/ROOT)(Key: AUTH_TYPE)(Value:)(Key: AUTH_USER)(Value:)(Key: AUTH_PASSWORD)(Value:)(Key: LOGON_USER)(Value:)(Key: REMOTE_USER)(Value:)",
$out, PREG_SET_ORDER);
foreach ($out as $pair) {
echo "ALL: ".$pair[0]."\n";
echo "KEY: ".$pair[1]."\n";
echo "VAL: ".$pair[2]."\n";
}
You probably don't need the ALL lines.
Based on your sample string, you might like this regex better:
'/\(Key: ([^)]+)\)\(Value:([^)]*)\)/'

Answer 2

The regular expression /\(Key:\s*(.*?)\)\(Value:\s*(.*?)\)/ will match all the key/value pairs in the string
This program builds an array $data with the each key/value pair related in an element
$str = '(Key: ALL_HTTP)(Value:HTTP_HOST:10.1.1.1 )(Key: ALL_RAW)(Value:Host: 10.1.1.1:80 )(Key: APPL_MD_PATH)(Value:/ROOT)(Key: AUTH_TYPE)(Value:)(Key: AUTH_USER)(Value:)(Key: AUTH_PASSWORD)(Value:)(Key: LOGON_USER)(Value:)(Key: REMOTE_USER)(Value:)';
$list = preg_match_all('/\(Key:\s*(.*?)\)\(Value:\s*(.*?)\)/', $str, $data);
$data = array_combine($data[1], $data[2]);
var_dump($data);
output
array(8) {
["ALL_HTTP"]=>
string(19) "HTTP_HOST:10.1.1.1 "
["ALL_RAW"]=>
string(18) "Host: 10.1.1.1:80 "
["APPL_MD_PATH"]=>
string(5) "/ROOT"
["AUTH_TYPE"]=>
string(0) ""
["AUTH_USER"]=>
string(0) ""
["AUTH_PASSWORD"]=>
string(0) ""
["LOGON_USER"]=>
string(0) ""
["REMOTE_USER"]=>
string(0) ""
}