Converts time or number to its representation in emoji symbols

emojiTime.php

function convertNumberToEmoji($cyfra)
{

switch ($cyfra) {
    case '0':
        return "\u{30}\u{FE0F}\u{20E3}";
                break;
    case '1':
        return "\u{31}\u{FE0F}\u{20E3}";
                break;
    case '2':
        return "\u{32}\u{FE0F}\u{20E3}";
                break;
    case '3':
        return "\u{33}\u{FE0F}\u{20E3}";
                break;
    case '4':
        return "\u{34}\u{FE0F}\u{20E3}";
                break;
    case '5':
        return "\u{35}\u{FE0F}\u{20E3}";
                break;
    case '6':
        return "\u{36}\u{FE0F}\u{20E3}";
                break;
    case '7':
        return "\u{37}\u{FE0F}\u{20E3}";
                break;
    case '8':
        return "\u{38}\u{FE0F}\u{20E3}";
                break;
    case '9':
        return "\u{39}\u{FE0F}\u{20E3}";
                break;
    default:
        return " ";
        break;
    }
}

function convertTimeToEmoji($str)
{
    # Supported time format {hh}:{mm}
$array = str_split($str,1);
$result=array();
foreach ($array as $char) {
    $result[] = convertNumberToEmoji($char);
}
$emojistring = implode("",$result);
return $emojistring;

}
function convertTimeToClockIcon($str)
{
  # Supported time format {hh}:{mm}
  #
$timesbefore=["00:00","00:30","1:00","1:30","2:00","2:30","3:00","3:30","4:00","4:30","5:00","5:30","6:00","6:30","7:00","7:30","8:00","8:30","9:00","9:30","10:00","10:30","11:00","11:30"];
$timesafter =[
"12:00" => "\u{1F55B}",
"12:30" => "\u{1F567}",
"13:00" => "\u{1F550}",
"13:30" => "\u{1F55C}",
"14:00" => "\u{1F551}",
"14:30" => "\u{1F55D}",
"15:00" => "\u{1F552}",
"15:30" => "\u{1F55E}",
"16:00" => "\u{1F553}",
"16:30" => "\u{1F55F}",
"17:00" => "\u{1F554}",
"17:30" => "\u{1F560}",
"18:00" => "\u{1F555}",
"18:30" => "\u{1F561}",
"19:00" => "\u{1F556}",
"19:30" => "\u{1F562}",
"20:00" => "\u{1F557}",
"20:30" => "\u{1F563}",
"21:00" => "\u{1F558}",
"21:30" => "\u{1F564}",
"22:00" => "\u{1F559}",
"22:30" => "\u{1F565}",
"23:00" => "\u{1F55A}",
"23:30" => "\u{1F566}"
];
if (in_array($str, $timesbefore)) {

foreach (array_values($timesbefore) as $i => $value) {
    if ($str == $value) {
        $allkeys = array_keys($timesafter);
        return $timesafter[$allkeys[$i]];
    }
}
} else {
    if (array_key_exists($str,$timesafter)) {
        return $timesafter[$str];
    }
}
}