laravel morilog jalali to gregorian helper functions

morilog_jdate_helpers.php

<?php 

// work with ( https://github.com/morilog/jalali ) , to send jalali datetime and get gregorian datetime
// example : jalali_to_gregorian('1397-01-29 20:20:20)

function jalali_to_gregorian ($jalali){

    $miladi_array = \Morilog\Jalali\jDateTime::toGregorian(
        datetime_slice($jalali,'year'),
        datetime_slice($jalali,'month'),
        datetime_slice($jalali,'day')
    );

    return implode('-',$miladi_array)." ".datetime_slice($jalali,'time');

}

function convert_numbers_to_persian($string) {
    $persian = ['۰', '۱', '۲', '۳', '۴', '۵', '۶', '۷', '۸', '۹'];
    $arabic = ['٩', '٨', '٧', '٦', '٥', '٤', '٣', '٢', '١','٠'];

    $num = range(0, 9);
    $convertedPersianNums = str_replace($persian, $num, $string);
    $englishNumbersOnly = str_replace($arabic, $num, $convertedPersianNums);

    return $englishNumbersOnly;
}

function datetime_slice ($datetime_string,$slice_type){

    $datetime_string = convert_numbers_to_persian($datetime_string);
    $by_space = explode(' ',$datetime_string);
    $by_colon_date = explode('-',$by_space[0]);
    $by_colon_time = explode(':',$by_space[1]);


    switch ($slice_type)
    {
        case 'date':
            return $by_space[0];
            break;

        case 'time':
            return $by_space[1];
            break;

        case 'year':
            return  $by_colon_date[0];
            break;

        case 'month':
            return  $by_colon_date[1];
            break;

        case 'day':
            return  $by_colon_date[2];
            break;

        case 'hour':
            return  $by_colon_time[0];
            break;

        case 'minute':
            return  $by_colon_time[1];
            break;

        case 'second':
            return  $by_colon_time[2];
            break;
    }

    return false;
}

?>