note 96304 added to function.base-convert
| From: | Tamas at osu1 dot php dot net | Date: | Fri, 19 Feb 2010 15:55:16 +0000 |
| Subject: | note 96304 added to function.base-convert | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-166177@lists.php.net to get a copy of this message | ||
Another pair of functions to convert between numbers and their uppercase alphabet representation (A,
B, ..., Z, AA, AB, ..., AZ, BA, BB, ..., BZ, CA, ..., ZZ, AAA, AAB, etc.)
<?php
/*
* Convert an integer to a string of uppercase letters (A-Z, AA-ZZ, AAA-ZZZ, etc.)
*/
function num2alpha($n)
{
for($r = ""; $n >= 0; $n = intval($n / 26) - 1)
$r = chr($n%26 + 0x41) . $r;
return $r;
}
/*
* Convert a string of uppercase letters to an integer.
*/
function alpha2num($a)
{
$l = strlen($a);
$n = 0;
for($i = 0; $i < $l; $i++)
$n = $n*26 + ord($a[$i]) - 0x40;
return $n-1;
}
?>
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Probable Submitter: 66.155.211.158
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Manual Page -- http://www.php.net/manual/en/function.base-convert.php
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