Grouping with hyphenate not working with i18N for weekdays - php

Question

I am working on a snippet for displaying opening hours and it works fine in english language and when I change the keys of array to another language it doesn't hyphenate the letters instead it does separation by comma.
What am I doing Wrong?
Below is the PHP code with 2 arrays with 1 commented which is in english and which works fine. Another is an italian langugage weekdays
<?php
/*
// english weekdays
$openHours = array(
'Mon' => '9am-7pm',
'Tue' => '9am-7pm',
'Wed' => '9am-7pm',
'Thu' => '9am-10pm',
'Fri' => 'closed',
'Sat' => '9am-10pm',
'Sun' => '9am-10pm'
);
*/
// italian weekdays
$openHours = array(
'lunedì' => '9am-7pm',
'martedì' => '9am-7pm',
'mercoledì' => '9am-7pm',
'giovedì' => '9am-10pm',
'venerdì' => 'closed',
'sabato' => '9am-10pm',
'domenica' => '9am-10pm'
);
$new_array = array();
foreach($openHours as $key => $value)
{
if(in_array($value,$new_array))
{
$key_new = array_search($value, $new_array);//to get the key of element
unset($new_array[$key_new]); //remove the element
$key_new = $key_new.','.$key; //updating the key
$new_array[$key_new] = $value; //inserting new element to the key
}
else
{
$new_array[$key] = $value;
}
}
foreach ($new_array as $days=>$time){
$daylist = explode(',',$days);
if ($time!='closed'){
if (count($daylist)>2){
$limit = count($daylist)-1;
$first = $daylist[0];
$last = $daylist[$limit];
//loop will go here.
if (date('D', strtotime('+'.$limit.' days', strtotime($first)))==$last){
echo $first.'-'.$last.' '.$time.'<br>';
} else {
$sep = '';
foreach ($daylist as $sepdays){
echo $sep.$sepdays;
$sep = ',';
}
echo ' '.$time.'<br>';
}
} else {
echo $days.' '.$time.'<br>';
}
} else {
$daylist = explode(',',$days);
foreach ($daylist as $sepdays){
echo $sepdays.' '.$time.'<br>';
}
}
}
?>
RESULT
Current Result what am getting with italian language.
lunedì,martedì,mercoledì 9am-7pm
venerdì closed
giovedì,sabato,domenica 9am-10pm
Expected RESULT
This is what I'm expecting.
lunedì-mercoledì 9am-7pm
venerdì closed
giovedì,sabato,domenica 9am-10pm

Answer 1

You are using your array's keys within date and strtotime functions to do your comparisons, both functions works for English. If you need to do it on other languages you should use setlocale and strftime, it will be a lot more complicated process. My suggestions:
Use numeric representation of the days of the week (0-6) and on display, replace the number with the value for the desired language.
Use multidimensional arrays including the numeric day of the week and the opening hours.