search for host in string 2 PHP

searchstring2.php

<?php
//simulating the array from string:
$s = '
[2018-02-19 14:08:32] [info] status=GOOD&unit_status=GOOD&hostname=acme
[2018-02-19 14:08:32] [alert] Wrong status! (Not "DEGRADED")
[2018-02-19 14:08:37] [info] Request with params {"status":"GOOD","unit_status":"GOOD","hostname":"joe"}
[2018-02-19 14:08:37] [info] status=GOOD&unit_status=GOOD&hostname=joe
[2018-02-19 14:08:37] [alert] Wrong status! (Not "DEGRADED")
';

$lines=array();
$fp = fopen("../log/simplelogger.log", "r");
while(!feof($fp))
{
   $line = fgets($fp);
   array_push($lines, $line);
   if (count($lines)>5)
       array_shift($lines);
}
fclose($fp);

//$s = implode($lines)
$matches = [];
preg_match_all('#\b(status=.+)\b#', $s, $matches);
$rows = array_map(function($entry) {
    $parsedStr = [];
    parse_str($entry, $parsedStr);
    return $parsedStr;
}, $matches[1]);

if(empty($rows)){
    echo 'not found';
}else{
    foreach($rows as $statusLine) {
        echo 'hostname: '.$statusLine['hostname'].PHP_EOL;
        echo 'status: '.$statusLine['status'].PHP_EOL;
        echo 'unit_status: '.$statusLine['unit_status'].PHP_EOL.PHP_EOL;
    }
}