RE: [PHP] stepping through alphabet

On 19 November 2003 14:25, Jay Blanchard contributed these pearls of wisdom: > [snip] > for ($letter = 'A'; $letter++; $letter <= 'Z') > echo "<a > href=\"?action=alphabet&letter=$letter\">$letter</a>\n"; > [/snip] > > I tested this and found two small problems. The code works if > you do this (I was myself amazed that letters would increment) Well, it's mentioned (briefly) in the manual (http://uk.php.net/manual/en/language.operators.increment.php), so maybe you shouldn't be so amazed. > > for($letter = 'A'; $letter < 'Z'; $letter++){ > echo $letter . "\n"; > } > > The problem seems to be that you cannot use <='Z' for some > reason, as the array becomes quite lengthy, as if 'Z' doesn't > work properly. The problem is not that 'Z' doesn't work "properly", but that that PHP's idea of "properly" is different from yours: 'Z'+1 is defined to be 'AA' (it says that in the manual, too!), so your loop has to be: for($letter = 'A'; $letter <= 'AA'; $letter++){ echo $letter . "\n"; } Cheers! Mike -- Mike Ford, Electronic Information Services Adviser, Learning Support Services, Learning & Information Services, JG125, James Graham Building, Leeds Metropolitan University, Beckett Park, LEEDS, LS6 3QS, United Kingdom Email: m.ford@leedsmet.ac.uk Tel: +44 113 283 2600 extn 4730 Fax: +44 113 283 3211