Home Get Global Timezones/Locations in Dropdown Select Menu

Get Global Timezones/Locations in Dropdown Select Menu

October 7, 2017

Using PHP’s listidentifiers (part of the DateTimeZone class ), we can create a dropdown menu of all available global timezone identifiers. It’s handy for inclusion in forms if you’re after a general region rather than just country.

The first function retrieves timezone values and returns an array:

<?php
/*
	Get Global Timezones/Locations in Dropdown Select Menu
	http://www.beliefmedia.com/code/php-snippets/timezone-select-menu
*/

 
function beliefmedia_get_timezones() {
  $o = array();
  $t_zones = timezone_identifiers_list();
     
  foreach($t_zones as $a) {
  $t = '';

    try {
      /* Throws exception for 'US/Pacific-New' */
      $zone = new DateTimeZone($a);
             
      $seconds = $zone->getOffset( new DateTime('now', $zone) );
      $hours = sprintf( '%+02d', intval($seconds / 3600));
      $minutes = sprintf( '%02d', ($seconds % 3600) / 60);
     
      $t = $a . '  [ ' . $hours . ':' . $minutes . ' ]';
      $o[$a] = $t;
    }
         
    /* Exceptions must be catched, else a blank page */
    catch(Exception $e) {
      /* die("Exception : " . $e->getMessage() . '<br />'); */
    }

  }

  /* Sort array by key */
  ksort($o);
     
 return $o;
}

<?php

Get Global Timezones/Locations in Dropdown Select Menu

http://www.beliefmedia.com/code/php-snippets/timezone-select-menu

function beliefmedia_get_timezones() {

$o = array();

$t_zones = timezone_identifiers_list();

foreach($t_zones as $a) {

$t = '';

try {

/* Throws exception for 'US/Pacific-New' */

$zone = new DateTimeZone($a);

$seconds = $zone->getOffset( new DateTime('now', $zone) );

$hours = sprintf( '%+02d', intval($seconds / 3600));

$minutes = sprintf( '%02d', ($seconds % 3600) / 60);

$t = $a . ' [ ' . $hours . ':' . $minutes . ' ]';

$o[$a] = $t;

}

/* Exceptions must be catched, else a blank page */

catch(Exception $e) {

/* die("Exception : " . $e->getMessage() . '<br />'); */

}

/* Sort array by key */

ksort($o);

return $o;

}

The second function retrieves the timezone array and manufactures the select menu.

/*
	Get Global Timezones/Locations in Dropdown Select Menu
	http://www.beliefmedia.com/code/php-snippets/timezone-select-menu
*/


function beliefmedia_timezones() {

  /* Get timezones */
  $o = beliefmedia_get_timezones();

  foreach($o as $tz => $label) {
    $return .= '<option value="' . $tz . '">' . $label . '</option>';
  }

 return '<select name="timezone" style="height: 30px; font-size: 1.0em;">' . $return . '</select>';
}

Get Global Timezones/Locations in Dropdown Select Menu

http://www.beliefmedia.com/code/php-snippets/timezone-select-menu

function beliefmedia_timezones() {

/* Get timezones */

$o = beliefmedia_get_timezones();

foreach($o as $tz => $label) {

$return .= '<option value="' . $tz . '">' . $label . '</option>';

}

return '<select name="timezone" style="height: 30px; font-size: 1.0em;">' . $return . '</select>';

}

Usage is as follows:

/* Usage */
echo beliefmedia_timezones();

1 2	/* Usage */ echo beliefmedia_timezones();

The results is as follows:

Note: I’ve included raw HTML to show the list so timezone values may not be correct.

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Get Global Timezones/Locations in Dropdown Select Menu

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