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Bug #7385 'letter counting' bug when counting a-z
Submitted: 2000-10-21 21:13 UTC Modified: 2000-10-22 14:56 UTC
From: delme at jumeaux dot bc dot ca Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 4.0.3pl1, 4.0.2 OS: Linux 2.2 and win32
Private report: No CVE-ID: None
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From: delme at jumeaux dot bc dot ca
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 [2000-10-21 21:13 UTC] delme at jumeaux dot bc dot ca 
for ($i = 'A'; $i <= 'Z'; $i++) {
    print $i. '<br>';
}

the above code *should* produce 26 letters, but instead it counts all the way from A to YZ.

A to ZZ counts from A to ZYZ, and so on.

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 [2000-10-22 11:20 UTC] lyric@php.net 
Applying ++ to a string essentially treats it like a base-26 number. It goes from 'a,b,c... y,z,aa,ab,ac...' etc. 

Try something like this. Maybe some else has a tidier way?

  for ( $i='A'; $i!='AA'; $i++ )
    print $i. '<br>';
 [2000-10-22 14:56 UTC] delme at jumeaux dot bc dot ca 
i assume your point is that <= does not operate on letters in the same way; it's a string comparison operator.  i should have seen this, i suppose.

it's too late now, but perhaps php should have been developed more along the lines of perl, with separate operators for string functions... then mathematical operators could treat letters as base 26 numbers, and string operators could do alphabetical comparisons.

this special overloading of ++ is misleading.
 
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