i don't understund this

[channark]

hello i found this tutorial to creat a hexadecimal colors table using the php
but i don't understund tha they use $couleurs array widthout keys [] that mean the keys by default are from 0 to 6, but they use a var $coulurscellule other keys & it works how ?

<?php
[COLOR="Red"]$couleur=array("00","33","66","99","CC","FF");[/COLOR]
for($rouge=0;$rouge<6;$rouge++)
	{
	echo "<table>";
	for($vert=0;$vert<6;$vert++)
		{
		echo "<tr>";
		for($bleu=0;$bleu<6;$bleu++)
			{
			[COLOR="Red"]$couleurCellule=$couleur[$rouge].$couleur[$vert].$couleur[$bleu];[/COLOR]
			echo "<td width='100' bgcolor='#".$couleurCellule."'>";
			  echo $couleurCellule;
			echo "</td>";
			}
		echo "</tr>";
		}
	echo "</table>";
	}
?>

[Emma]

It works using the array position, like this:

 // First pass
 $rouge = 0;
 $vert = 0;
 $bleu = 0;

 // Get the array value, using the position rather than the key name
 $couleurCellule=$couleur[$rouge].$couleur[$vert].$couleur[$bleu];
 // $couleurCellule=$couleur[0].$couleur[0].$couleur[0];

 //Result: $couleurCellule = 000000



 // Second pass
 $rouge = 0;
 $vert = 0;
 $bleu = 1; // Only the inner most loop has incremented

 $couleurCellule=$couleur[0].$couleur[0].$couleur[1];
 //Result: $couleurCellule = 000033

[channark]

thank you so much