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Refresher for array handling???

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I have come across a rather old php program that develops a two
dimensional array's content then displays the accumulated contents at
the end.

After some upgrades to the latest php 5.x I started seeing "array to
string conversion errors".  I am aware that these warings can be
suppressed but I'd rather take the time to reference the array
elements the correct way.

Here's a snippet of code as it looks now:
$frq = array(array);
.
//  logic to accumulate statistics (all works fine based on dump of
array
.
.
// unload accummulated array as rows in a table
// iterate top to bottom using lowest to highest defined values
for  ( $X=$_minimum; $X<=$_maximum; $X++) {
	$Y = sprintf("%02d",$X);
	$Y1 = sprintf("%u",$X);
	print <<< EOD
	<tr bgcolor="$bgcolor">
	<td align="center"><img src="pix/balls/$Y.png" alt="$Y" ></td>
EOD;
	// iterate left to right based on predefined columns
	for ( $z=0; $z<=7; $z++) {
		$Y2 = sprintf("%u",$z);
		print <<< EOD
		<td align="center">$frq[$Y1][$Y2]</td>
EOD;
	}
}
.
.

as can be seen, I'm expanding the index X to a zero filled 2 character
string representative of the integer to properly select the image.
Also, the sprintf %u is to convert the index pointer to an unsigned
integer to point to each numbered index.

While this or something like this has been working for many years I
know there is a more standard way.  I'm hoping someone will provide an
example of the "best" or at least "most conventional" method to
accomplish this task.

Thanks for any/all that can help.


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Refresher for array handling??? bobmct <r.mariotti@fdcx.net> - 2015-07-14 12:12 -0400
  Re: Refresher for array handling??? Erwin Moller <erwinmollerusenet@xs4all.nl> - 2015-07-15 15:01 +0200
    Re: Refresher for array handling??? Erwin Moller <erwinmollerusenet@xs4all.nl> - 2015-07-15 15:03 +0200
    Re: Refresher for array handling??? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-07-17 21:24 +0200
      Re: Refresher for array handling??? Erwin Moller <erwinmollerusenet@xs4all.nl> - 2015-07-20 16:30 +0200
        Re: Refresher for array handling??? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-07-20 19:45 +0200
          Re: Refresher for array handling??? Matthew Carter <m@ahungry.com> - 2015-07-20 22:36 -0400
          Re: Refresher for array handling??? Erwin Moller <erwinmollerusenet@xs4all.nl> - 2015-07-21 11:22 +0200
            Re: Refresher for array handling??? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-07-21 13:30 +0200
              Re: Refresher for array handling??? Erwin Moller <erwinmollerusenet@xs4all.nl> - 2015-07-21 14:03 +0200
        Re: Refresher for array handling??? Denis McMahon <denismfmcmahon@gmail.com> - 2015-07-21 01:01 +0000
          Re: Refresher for array handling??? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-07-21 09:07 +0200
  Re: Refresher for array handling??? "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-07-15 20:18 +0200
  Re: Refresher for array handling??? Denis McMahon <denismfmcmahon@gmail.com> - 2015-07-17 02:51 +0000

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