note 86037 added to function.range

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