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Request #30845 add "in" operator to test for inclusion
Submitted: 2004-11-19 22:29 UTC Modified: 2004-11-20 01:55 UTC
Votes:3
Avg. Score:2.0 ± 0.8
Reproduced:2 of 2 (100.0%)
Same Version:1 (50.0%)
Same OS:0 (0.0%)
From: phpbugs at eire dot ca Assigned:
Status: Wont fix Package: Feature/Change Request
PHP Version: 5.0.2 OS: FreeBSD
Private report: No CVE-ID: None
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 [2004-11-19 22:29 UTC] phpbugs at eire dot ca 
Description:
------------
Some languages such as SQL or (cough)Visual Basic(cough) include an "in" operator to test for inclusion in a given range of values.

SQL uses an explicit list of values like so:
SELECT s1 FROM t1 WHERE s1 IN (SELECT s1 FROM t2);
Or an even simpler example:
SELECT 'foo' IN ('foo','bar','foobar');

Visual Basic makes it even better by adding the ellipsis operator:
if iBar in (25..40) then

This would be a great addition to PHP, with or without the ellipsis operator.  It would be especially useful for switch statements.  And if you could pass it an array, I'd be in heaven!

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 [2004-11-19 22:36 UTC] jed at jed dot bz 
The ellipsis operator is unnecessary due to the existence of the range() function.

   true == 5 in range(1, 10);

The in operator, in my opinion, is unnecessary and is only syntactic sugar due to the existence of in_array(). I don't like S.S. operators (I opposed instanceof et. al., as well as "and" as an alternative to &&). In the long run, syntactic sugar makes code more difficult to read and just adds more passes in the parser. PHP at its root isn't BASIC.

It's nice functionality, I agree, but there's a lot more that could be done to the language to make it more like VB. And that's not a good path to start down.
 [2004-11-20 01:55 UTC] derick@php.net 
in_array in combination with range() does the same. We will not add more syntax for this.

Derick
 
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