PHP convert formatted string (title + values) to multidimensional array - php

Question

I would like to convert this formatted string to multidimensional array but I can't manage to do it.
The goal is to extract titles header (Dreg Time, FN, SS_ID, MAC, Sector ID, Type, Reason, CMPNT, Basic, Cid) and associating the corresponding values.
Because in the finality I would need to process the data in the "Reason" column.
String:
$log = ": mss get dereg_log 2 500
---------- MODEM 2 MAC ---------
Dreg Time FN SS_ID MAC Sector ID Type Reason CMPNT Basic Cid
2017/08/29 08:20:39:627 0x4da9f0 8277 00:24:a0:xx:xx:xx 1 2 25 0 86
2017/08/29 07:17:33:478 0x421c02 8238 00:23:a2:xx:xx:xx 1 3 59 0 47
2017/08/29 06:00:43:232 0x340a41 8508 00:23:a2:xx:xx:xx 1 1 6 13 317
Total Deregistrations since sector active in sector 1: 9576
Derigistrations since dreg log last reset in sector 1: 9576
Deregistration Types:
DEREG_MSS_IMMEDIATE = 0
DEREG_MSS_DREG_REQ_FROM_AP = 1
DEREG_MSS_DREG_REQ_FROM_MS = 2
DEREG_MSS_RNG_RSP_ABORT_FROM_AP = 3
DEREG_MSS_CONTACT_LOST = 4
---------------------------------
2017-Aug-29 08:31:53.860";
Desired Array:
Array
(
[0] => Array
(
[Dreg Time] => '2017/08/29 08:20:39:627'
[FN] => '0x4da9f0'
[SS_ID] => '8277'
[MAC] => '00:24:a0:xx:xx:xx'
[Sector ID] => '1'
[Type] => '2'
[Reason] => '25'
[CMPNT] => '0'
[Basic Cid] => '86'
)
[1] => Array
(
[Dreg Time] => '2017/08/29 07:17:33:478'
[FN] => '0x421c02'
[SS_ID] => '8238'
[MAC] => '00:23:a2:xx:xx:xx'
[Sector ID] => '1'
[Type] => '3'
[Reason] => '59'
[CMPNT] => '0'
[Basic Cid] => '47'
)
[2] => Array
(
[Dreg Time] => '2017/08/29 06:00:43:232'
[FN] => '0x340a41'
[SS_ID] => '8508'
[MAC] => '00:23:a2:xx:xx:xx'
[Sector ID] => '1'
[Type] => '1'
[Reason] => '6'
[CMPNT] => '13'
[Basic Cid] => '317'
)
)
Code tried:
echo '<pre>';
// remove blank lines
$log = preg_replace("/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "\n", $log);
// remove new lines
$log = preg_replace('/^.+\n.+\n/', '', $log);
$lines = explode( "\n\n", $log );
$return = array();
foreach ($lines as $line) {
$items = explode("\n", $line);
$return[array_shift($items)] = $items;
}
print_r($return);
Result:
Array
(
[Dreg Time FN SS_ID MAC Sector ID Type Reason CMPNT Basic Cid] => Array
(
[0] => 2017/08/29 08:20:39:627 0x4da9f0 8277 00:24:a0:xx:xx:xx 1 2 25 0 86
[1] => 2017/08/29 07:17:33:478 0x421c02 8238 00:23:a2:xx:xx:xx 1 3 59 0 47
[2] => 2017/08/29 06:00:43:232 0x340a41 8508 00:23:a2:xx:xx:xx 1 1 6 13 317
[3] => Total Deregistrations since sector active in sector 1: 9576
[4] => Derigistrations since dreg log last reset in sector 1: 9576
[5] => Deregistration Types:
[6] => DEREG_MSS_IMMEDIATE = 0
[7] => DEREG_MSS_DREG_REQ_FROM_AP = 1
[8] => DEREG_MSS_DREG_REQ_FROM_MS = 2
[9] => DEREG_MSS_RNG_RSP_ABORT_FROM_AP = 3
[10] => DEREG_MSS_CONTACT_LOST = 4
[11] => ---------------------------------
[12] => 2017-Aug-29 08:31:53.860
)
)

Answer 1

Your code was an incomplete attempt, and contained a few errors - e.g. you removed newlines from the log, and then tried split the string based on newlines! Then you tried to split a single line by newline, when clearly a single line cannot, by implication, contain a newline. Also the code just naively ran through each line and added it directly to the array rather than creating an associative array within each index, as shown in the desired output. And lastly it did nothing to try and identify which lines actually contained the desired output.
This will do it:
$log = preg_replace("/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "\n", $log);
$lines = explode( "\n", $log );
$return = array();
foreach ($lines as $line) {
$line = preg_replace("/\s+/", " ", $line); //condense and standardise the whitespace between each item, so that explode can work.
$items = explode(" ", $line);
if (count($items) == 10 && preg_match("/^[0-9]{4}/", $items[0])) //restrict to lines starting with the year, and with the correct number of columns
$return[] = array(
"Dreg Time" => $items[0]." ".$items[1],
"FN" => $items[2],
"SS_ID" => $items[3],
"MAC" => $items[4],
"Sector_ID" => $items[5],
"Type" => $items[6],
"Reason" => $items[7],
"CMPNT" => $items[8],
"Basic_Cid" => $items[9]
);
}
echo "<pre>".var_export($return, true)."</pre>";