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How to use Less Than or Greater Than in a switch statementHow to use Less Than or Greater Than in a switch statement
Solution
(From rnreekez in the comments, syntax modified to conform to Drupal's more verbose coding standards.)
Technically you want your switch statement to process for all things TRUE.
<?php
switch (TRUE) {
case ($value < 20 ):
return 1;
case ($value < 100):
return 5;
case ($value < 200):
return 10;
case ($value < 500):
return 20;
case ($value < 2000):
return 50;
default:
return 100;
}
?>Background
No less than or greater than statements allowed in switch statements?
Apparently not.
comparison operator in switch statement
WRONG! - this syntax caused a parse error
switch ($value) {
case '<20':
return 1;
case <100:
return 5;
case <200;
return 10;
case <500;
return 20;
case <2000;
return 50;
default:
return 100;
}
Again, the above is BAD. It causes this:
Parse error: syntax error, unexpected '<' in /home/zingspac/public_html/auction2007/modules/contributed/ecommerce/contrib/zing_auction/zing_auction.module on line 107
I don't think there's any way that this is allowed in a switch statement:
http://us.php.net/manual/en/control-structures.switch.php
That's sad.
Is there trickier syntax of which Agaric is not aware?
(For the record, Agaric replaced this switch or if/else idea with an elegant one-line function that divides an item's estimated value by an administrator-chosen factor and rounds up with ceil(), for our latest, greatest Zing Auction Module).
Searched words:
Switch is for equality comparison only, not for greater than / less than
Comments
You were close but yes that
You were close but yes that syntax is not correct. Technically you want your switch statement to process for all things TRUE.
switch (TRUE) {
case ($value < 20 ): return 1;
case ($value < 100): return 5;
case ($value < 200): return 10;
case ($value < 500): return 20;
case ($value < 2000): return 50;
default: return 100;
}
So at each case the expression is $value less than 'whatever' will be tested and return either TRUE or FALSE. Therefore your switch statement will be comparing TRUE to TRUE or TRUE to FALSE. I'd imagine that you're
using this similar to an IF/ELSE, so you shouldn't need a break statement.
Case Switch - Reply to Comment
Wow! I have been working with web design, and coding dynamic data for the last 4 years, and I never knew you could do this.
It just helped me finish coding the logic for a paging method, I've been working on. I will be sure to remember this for the future. It will certainly make things easier.
4 Years Later...
Well, I see it's four years later, but I just stumbled on this and it's good stuff. Thanks for the tip @rnreekez!
This was really useful for me
This was really useful for me too. Thanks for sharing!
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