How to solve string truncation

String truncation bri = bridge0if1 = wanif2 = lanif3 = vlanmac = 00: 11: 22: 1d: 2d: 3dip = 192.168.100.1netmask = 255.255.255.0arp = arpstate = stopbri = bridge1 string interception
Bri = bridge0 if1 = wan if2 = lan if3 = vlan mac = 00: 11: 22: 1d: 2d: 3d ip = 192.168.100.1 netmask = 255.255.255.0 arp = arp state = stop

Bri = bridge1 if1 = wan mac = 00: 01: 2B: 4C: 6D: 9F ip = 192.168.1.125 netmask = 255.255.255.0 state = stop

This is my saved configuration file
However, if headers are multiple choices, and the number of headers is not fixed. a maximum of eight are available. I want to retrieve the value of if.
That is
Bridge0: wan lan vlan
Bridge1: wan
This data is converted to an array

PHP code

  Array(    [0] => Array        (            [bri] => bridge0            [if1] => wan            [if2] => lan            [if3] => vlan            [mac] => 00:11:22:1d:2d:3d            [ip] => 192.168.100.1            [netmask] => 255.255.255.0            [arp] => arp            [state] => stop        )    [1] => Array        (            [bri] => bridge1            [if1] => wan            [mac] => 00:01:2B:4C:6D:9F            [ip] => 192.168.1.125            [netmask] => 255.255.255.0            [state] => stop        ))

Is there any good way?
After converting to an array, judge based on the key value

------ Solution --------------------

PHP code

$ S = "bri = bridge0 if1 = wan if2 = lan if3 = vlan mac = 00: 11: 22: 1d: 2d: 3d ip = 192.168.100.1 netmask = 255.255.255.0 arp = arp state = stop "; parse_str (strtr ($ s,'', '&'), $ a); print_r ($ );
------ Solution --------------------
Isn't it the key starting with if.


  
  

   
   
PHP code
   
   
[User:root Time:17:19:16 Path:/home/liangdong/php]$ php preg.php bridge0: wan lan vlanbridge1: wan[User:root Time:17:19:16 Path:/home/liangdong/php]$ cat preg.php