PHP: As the world turns...

Using PHP, how can I get a all the cities from my array where the local current time is between 10:00 am and 2:30 pm?

My array contains the city name and the offset from UTC time.
<?php

$cities=array();
$cities['Midway'] = -11;
$cities['Honolulu'] = -10;
$cities['LosAngeles'] = -7;
$cities['Chicago'] = -5;
$cities['NewYork'] = -4;
$cities['StJohns'] = -2.5;
$cities['CapeVerde'] = -1;
$cities['Moscow'] = 3;
$cities['Colombo'] = 5.5;
$cities['Perth'] = 8;
$cities['Norfolk'] = 11.5;

?>

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skijAsked:
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F IgorDeveloperCommented:
Using array_filter, you can use a function to do it.
You should check if function is getting the right current time


function inTime($offset){

    $currentTime=date("H:i:s",strtotime("+$offset hour" ));

    //ONLY for debug
    echo "Current time for $offset is $currentTime");

   return ($currentTime>="10:00:00" and $currentTime<="14:30:00");
}



$cities_in_time=array_filter($cities, "inTime");

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Julian HansenCommented:
How about this
<?php

$cities=array();
$cities['Midway'] = -11;
$cities['Honolulu'] = -10;
$cities['LosAngeles'] = -7;
$cities['Chicago'] = -5;
$cities['NewYork'] = -4;
$cities['StJohns'] = -2.5;
$cities['CapeVerde'] = -1;
$cities['Moscow'] = 3;
$cities['Colombo'] = 5.5;
$cities['Perth'] = 8;
$cities['Norfolk'] = 11.5;

// BOUNDS 10am - 14:30pm
$lower = 10 * 3600;
$higher = 14.5 * 3600;

// LOCAL TME
$localtime = time();

// UTC TIME
$utctime = $localtime-date("Z",$localtime);

// SECONDS SINCE MIDNIGHT UTC
$secondsincemidnight = $utctime - strtotime('today');

$result = array();

foreach($cities as $city => $time) {
  // LOCAL SECONDS SINCE MIDNIGHT
  $localssm = $time * 3600 + $secondsincemidnight;
  
  // IF LOCALSSM BETWEEN BOUNDS THEN ADD TO RESULT
  if ($localssm >= $lower && $localssm <= $higher) {
    $result[$city] = date('Y-m-d h:i:s', strtotime('today') + $localssm); 
  }
}
echo "<pre>" . print_r($result, true) . "</pre>";

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skijAuthor Commented:
Thank you both.   Only Julian's answer returns the correct results.

I have asked a related question here:
http://www.experts-exchange.com/questions/28734420/MySQL-As-the-world-turns.html
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Julian HansenCommented:
You are welcome.

Fraigor's solution used strtotime which returns local time rather than UTC - but using array_filter is a good option.
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