note 86037 added to function.range
| From: | thomas+php1 at tgohome dot com | Date: | Tue, 30 Sep 2008 15:44:50 +0000 |
| Subject: | note 86037 added to function.range | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-144906@lists.php.net to get a copy of this message | ||
Range as a string. Items are separated with a comma; which can be in any of the following formats:
"1, 2, 3, 4, 5, 6" - output: 1, 2, 3, 4, 5, 6
"1 - 6" - output: 1, 2, 3, 4, 5, 6
"1 -%2 6" - output: 1, 3, 5 (last number will not be counted unless it evenly fits in)
"1 - -6" - output: 1, 0, -1, -2, -3, -4, -5, -6
"0 - 0" - output: 0
"1, 2, 3, [LAST_NUM] - 6" - output: 1, 2, 3, 3, 4, 5, 6 (note repeated 3)
"1, 2, 3, [LAST_NUM+1] - 6" - output: 1, 2, 3, 4, 5, 6 (no repeated 3)
"1, 2, 3, [LAST_NUM+-1] - 6" - output: 1, 2, 3, 2, 3, 4, 5, 6
<?php
define('RANGE_ARRAY', 1);
define('RANGE_STRING', 2);
function range_string($range_str, $output_type = RANGE_ARRAY)
{
$range_out = array();
$ranges = explode(",", $range_str);
$last_num = 0;
foreach($ranges as $range)
{
$step = 1;
$range = trim($range);
if(is_numeric($range))
{
// Just a number; add it to the list.
$range_out[] = $range;
$last_num = $range;
}
else if(is_string($range))
{
// Figure out if it is just a character.
if(strlen($range) == 1)
{
$range_out[] = (string)$range;
$last_num = 0;
}
else
{
// Is probably a range of values.
$range_exp = explode(" ", $range);
if(substr($range_exp[1], 0, 1) == '-' && !is_numeric(substr($range_exp[1], 0,
1)))
{
// Jumping range?
$jump = str_split($range_exp[1], 1);
if(count($jump) > 0)
{
if($jump[1] == '%')
{
$step = substr($range_exp[1], 2);
}
}
else
{
// Normal range.
$step = 1;
}
}
else
{
$step = 1;
}
if($range_exp[0] == '[LAST_NUM]')
{
$start = $last_num;
}
else
{
$exp = explode("+", $range_exp[0]);
if($exp[0] == '[LAST_NUM')
{
$start = $last_num + trim($exp[1], ']');
}
else
{
$start = $range_exp[0];
}
}
$end = $range_exp[2];
if($start > $end)
{
for($i = $start; $i >= $end; $i -= $step)
{
$range_out[] = $i;
}
$last_num = $i;
}
else
{
for($i = $start; $i <= $end; $i += $step)
{
$range_out[] = $i;
}
$last_num = $i;
}
// echo $step . ", ";
}
}
}
if($output_type == RANGE_ARRAY)
{
return $range_out;
}
else
{
return implode(", ", $range_out);
}
}
echo range_string("1, 2, 3, [LAST_NUM+1] - 6", RANGE_STRING);
?>
----
Server IP: 92.48.74.199
Probable Submitter: 78.149.119.221
----
Manual Page -- http://www.php.net/manual/en/function.range.php
Edit -- https://master.php.net/note/edit/86037
Del: integrated -- https://master.php.net/note/delete/86037/integrated
Del: useless -- https://master.php.net/note/delete/86037/useless
Del: bad code -- https://master.php.net/note/delete/86037/bad+code
Del: spam -- https://master.php.net/note/delete/86037/spam
Del: non-english -- https://master.php.net/note/delete/86037/non-english
Del: in docs -- https://master.php.net/note/delete/86037/in+docs
Del: other reasons-- https://master.php.net/note/delete/86037
Reject -- https://master.php.net/note/reject/86037
Search -- https://master.php.net/manage/user-notes.php