switch ($variable) { case 0: statements; break; case 1: statements; break; case 2: statements; break; ... ... ... case n : statements; break; }Example:
<?php $day = 4; //if-else ladder if($day == 1) echo "Its a Monday!<br>"; elseif ($day == 2) echo "Its a Tuesday!<br>"; elseif ($day == 3) echo "Its a Wednesday!<br>"; elseif ($day == 4) echo "Its a Thursday!<br>"; elseif ($day == 5) echo "Its a Friday!<br>"; elseif ($day == 6) echo "Its a Saturday!<br>"; else { echo "Its a Sunday!!<br>"; echo "Its a Holiday!!<br>"; } //Above if-else ladder converted to a switch statements switch (day) { case 1: echo "Its a Monday!<br>"; break; case 2: echo "Its a Tuesday!<br>"; break; case 3: echo "Its a Wednesday!<br>"; break; case 4: echo "Its a Thursday!<br>"; break; case 5: echo "Its a Friday!<br>"; break; case 6: echo "Its a Saturday!<br>"; break; case 7: echo "Its a Sunday!!<br>"; echo "Its a Holiday!!<br>"; break; } ?>
In the above example, we have an if-else ladder that echo's day of the week depending on the value of variable $day, as this if-else ladder conditions are based on value of same varaible we can use Switch case as an alternative.Output
Its a Thursday! Its a Thursday!
switch ($variable) { case 0: statements; break; case 1: statements; break; case 2: statements; break; ... ... ... case n: statements; break; default: statements; }
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Continue statement can be used within switch,it acts similar to break. If we have a switch inside a loop and wish to continue to the next iteration of the outer loop, use continue. |
<?php $day = 9; switch (day) { case 1: echo "Its a Monday!<br>"; break; case 2: echo "Its a Tuesday!<br>"; break; case 3: echo "Its a Wednesday!<br>"; break; case 4: echo "Its a Thursday!<br>"; break; case 5: echo "Its a Friday!<br>"; break; case 6: echo "Its a Saturday!<br>"; break; case 7: echo "Its a Sunday!!<br>"; echo "Its a Holiday!!<br>"; break; default: echo "Invalid input!"; } ?>
Output
Invalid input!