How do you write a regular expression like this?

Mon-fri 8:00-23:00; Sat 10:00-23:00; Sun 10:00am-10:00pm;

Turn the above into Monday ~ Friday 8:00-23:00; Saturday 10:00-23:00; Sunday-10:00am;

$str = "Mon-fri 8:00-23:00; Sat 10:00-23:00; Sun 10:00am; "
$en =array ("Mon", "Fri", "Sat", "Sun");
$CN =array ("Monday", "Friday", "Saturday", "Sunday");
$str =str_replace ($en, $CN, $STR);

How to turn the English "-" into a ~, time between the non-replacement?
How to replace the space between English and digital?

Reply to discussion (solution)

$en =array ("Mon-fri", "Sat", "Sun");
$CN =array ("Monday ~ Friday", "Saturday", "Sunday");
$str =str_replace ($en, $CN, $STR);

Can be added based on your code
$str = preg_replace ('/-/', ' ~ ', $str, 1);

$str = "Mon-fri 8:00-23:00; Sat 10:00-23:00; Sun 10:00am-10:00pm "; $en =array ("Mon", "Fri", "Sat", "Sun"); $CN =array ("Monday", "Friday", "Saturday", "Sunday"); $str =str_replace ($en, $CN, $STR); Echo $str; $a [0]= '/([^\d]+) \-/'; $a [1]= '/\s (\d)/'; $b [0]= ' \1~ '; $b [1]= ' \1 '; $str =preg_replace ($a, $b, $str); Echo $str;

It's upstairs!

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