How to use Comma Separated String with switch statement - php

Question

I have a string $str="1,2,4";
Also I have a switch statement
switch ($str_value) {
case '0':
$finalday='Sunday';
break;
case '1':
$finalday='Monday';
break;
case '2':
$finalday='Tuesday';
break;
case '3':
$finalday='Wednesday';
break;
case '4':
$finalday='Thursday';
break;
case '5':
$finalday='Friday';
break;
case '6':
$finalday='Saturday';
break;
default: $finalday='';
}
Using this statement from given string I want to show result
as Day is : Monday,Tuesday,Thursday
how can I do that?

Answer 1

Instead of switch case make an array of days
$days = ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Saturday'];
$str="1,2,4";
$val = [];
foreach(explode(',',$str) as $value){
$val[] = $days[$value];
}
echo implode(',',$val);//Monday,Tuesday,Thursday

Answer 2

Don't use a switch statement. Use preg_replace:
$final_day = $str_value;
$final_day = preg_replace('/0/', 'Sunday', $final_day);
// ...
$final_day = preg_replace('/6/', 'Saturday', $final_day);
And you have it.

Answer 3

If you really want to use the switch statement, explode the string into an array:
myDays = explode(",", $str);
Then loop over myDays with the switch statement in the loop.

Answer 4

You can use preg_replace_callback and pass a $days array to it.
That'll get the required digit(using the regex) and return day from the $days array.
Something like this -
$days = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday","Friday","Saturday"]
preg_replace_callback('/\d+/',function($m)use($days){return $days[$m[0]];}, $str)
#OUTPUTS -
"Monday,Tuesday,Thursday"

Answer 5

Hope this will help:
<?php
$str='1,2,3';
$array=explode(',',$str);
$finalday='';
foreach($array as $a){
switch ($a) {
case '0':
$finalday.=',Sunday';
break;
case '1':
$finalday.=',Monday';
break;
case '2':
$finalday.=',Tuesday';
break;
case '3':
$finalday.=',Wednesday';
break;
case '4':
$finalday.=',Thursday';
break;
case '5':
$finalday.=',Friday';
break;
case '6':
$finalday.=',Saturday';
break;
default: $finalday='';
}
}
echo substr($finalday,1);