[SOLVED] Stagered Looping?

[sw41]

If there an easy way to make a loop that makes this sequence of numbers where I define $x and then it sequences like below?

 

1 2 3 4 5 6 7 8 $x    $x 8 7 6 5 4 3 2 1

2 3 4 5 6 7 8 $x 1    1 $x 8 7 6 5 4 3 2

3 4 5 6 7 8 $x 1 2    2 1 $x 8 7 6 5 4 3

4 5 6 7 8 $x 1 2 3    3 2 1 $x 8 7 6 5 4

... and so on until all numbers are used

$x 1 2 3 4 5 6 7 8    8 7 6 5 4 3 2 1 $x

 

Thanks in advance!

[gevans]

this should do it;

 

<?php
$x = isset($_GET['x']) ? $_GET['x'] : 8;
for($i=1; $i<=$x; $i++) {
for($j=$i; $j<$x+$i; $j++) {
	echo $j > $x ? $j-$x." " : "$j ";
}
echo '<br />';
}

 

 

your-page.php?x=8 - that will set x (if it isn't set the script defaults it to

[sw41]

That is awesome! 

It gets me the 1st half of the line:

1 2 3 4 5 6 7 8 8 7 6 5 4 3 2 1

2 3 4 5 6 7 8 1 1 8 7 6 5 4 3 2

 

How do I reverse the J loop to do the 2nd half?

 

[gevans]

not sure why, but i ignored taht for some reason

 

<?php
$x = isset($_GET['x']) ? $_GET['x'] : 8;
for($i=1; $i<=$x; $i++) {
for($j=$i; $j<$x+$i; $j++) {
	echo $j > $x ? $j-$x." " : "$j ";
}
$j--;
for($j; $j>=0+$i; $j--) {
	echo $j > $x ? $j-$x." " : "$j ";
}
echo '<br />';
}

[sw41]

Very Awesome, thanks!!