If you want execute one block of code out of many, use switch
statement. The switch statement is to avoid long block of if..elseif..else
code.
Below is switch statement syntax:-
switch (expression)
{
case label1:
code to be executed if expression = label1;
break;
case label2:
code to be executed if expression = label2;
break;
default:
code to be executed
if expression is different
from both label1 and label2;
}
Switch statement executes line by line and once finds a true condition
it execute the corresponding block code and all other remaining cases till the end
of switch statement. To avoid this add a
break statement at the end of each case block. The break statement tells the
php to jump out of the switch case statement once it execute the code with
first true case. If there is no matching case then the code in default block
will be executed.
Difference
between if…else and switch case in PHP
The switch case statement is an alternative of if…elseif…else
statement. The if…elseif…else statement also do same thing. The switch case statement
finds a suitable block of code with true case and execute that code.
The only difference is that switch case statement is executed line
by line and once a true condition is find not only executed that case but also
execute all the subsequent cases till the end of switch statement. To prevent
this break statement is used.
 |
| Switch Case Statement in PHP |
Example:-
The following example will output current day.
<?php
$today =
date("D");
switch($today){
case
"Mon":
echo "Today
is Monday. ";
break;
case
"Tue":
echo "Today
is Tuesday. ";
break;
case
"Wed":
echo "Today
is Wednesday. ";
break;
case
"Thu":
echo "Today
is Thursday.";
break;
case
"Fri":
echo "Today
is Friday.";
break;
case
"Sat":
echo "Today
is Saturday.";
break;
case
"Sun":
echo "Today
is Sunday.";
break;
default:
echo "This
seems that some special day.";
break;
}
?>
