timezone_identifiers_list function to get all the time zones available

timezone_identifier_list()

To know all the time zones we can set by using date_default_timezone_set() function can be listed by using timezone_identifiers_list() . This function will return an array with list of time zones available. Here is the code to list all time zones.

<?Php
$a = timezone_identifiers_list();
while (list ($key, $val) = each ($a)) {
echo "$key -> $val <br>";
} 
?>

Note that this way we can give an option to the users to select a time zone.

PHP code to generate dropdown list with timezones

<form method=post name=f1>
<?Php
$a = timezone_identifiers_list();
echo "<select name=tz onChange=disp_TZ() class='form-control'>";
while (list ($key, $val) = each ($a)) {
echo "<option value=$val>$val</option>";
} 
echo "</select>";
?>
</form>

Read how JavaScript code is developed to generate array of world Timezone names using timezone_identifiers_list()

Try to display a drop down list by taking data from the above array.

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