<?php
error_reporting(E_ALL);


# The procedural approach
function new_que()
	{ return array('size' => 0, 'data' => array()); }

function que_ingress(&$que, $val)
	{ 
	array_push($que['data'], $val); 
	++$que['size'];
	}

function que_egress(&$que)
	{
	--$que['size']; 
	return array_shift($que['data']); 
	}

function que_depleted(&$que)
	{ 
	if($que['size']==0)
		{ return true; }
	else
		{ return false; }
	}

function que_drop(&$que)
	{
	--$que['size'];
	array_shift($que['data']); 
	}

echo "\n\nThe non OO approach\n";
$que = &new_que();
$val='';
$list=array('Stewart', 'Schwantz', 'Falapa', 'Rossi', 'Earnhardt', 'Crevier');

# Enter data into the que
while(list($k, $v)=each($list))
  { que_ingress($que, $v); }

# Drop the car driver
que_drop($que);

while(que_depleted($que)==false)
	{ 
	$val=que_egress($que);
	if($val=='Earnhardt')
		{ /* Get rid of the other car driver */ }
	else
		{ echo $val."\n"; }
	}

Unset($que, $list);
echo "\n\nNow for the OO approach\n";

# The OO approach
class Que
	{
	var $q=array();
	var $cntr;

	function ingress($val)
		{ 
		$this->q[]=$val;	
		++$this->cntr;
		}

	function egress()
		{
		if($this->cntr>0)
			{
			--$this->cntr; 
			return array_shift($this->q); 
			}
		else
			{ return false; }	
		}

	function drop()
		{ 
		if($this->cntr>0)
			{		
			array_shift($this->q);
			--$this->cntr;
			}
		else
			{ return false; }	
		}

	function depleted()
		{ 
		if($this->cntr==0)
			{ return true; }
		else
			{ return false; }
		}
	}

$que = &new Que;
$list=array('Cey', 'Jordan', 'Sprewell', 'Plunkett', 'Iverson', 'Duncan');

# Enter data into the que
while(list($k, $v)=each($list))
	{ $que->ingress($v); }


$que->drop();// Get rid of the baseball player
while($que->depleted()==false)
	{ 
 	$val=$que->egress();
 	if($val=='Plunkett')
 		{ /* Who likes football anyways? */ }
 	else
 		{ echo $val."\n"; } 
 	}

?>