[RESOLVED] String to array conversion

SWiers

I have an input (a posted variable called SIMsubmit) that looks like this (out to 121 variations- it represents data found in a table that can be anywhere from 6x6 to 11x11, but that's not really relvant to my question):

x27y39r6g4;x28y39r11g26;x29y39r9g14;x30y39r4g13;x31y39r6g4;x32y39r13g6;x33y39r0g5;

I'm trying to process this into 4 arrays that list the values found after each x, y, r, and g. Here's the code I'm using:

	$SIMsubmit = $_POST['SIMsubmit'];
	$xMatches = preg_match_all ( '/(x\d+)(y\d+)(r\d+)(g\d+);/' , $SIMsubmit , $submitXYRGs, PREG_PATTERN_ORDER);
	$submitXs = $submitXYRGs[1];
	$submitYs = $submitXYRGs[2];
	$submitRs = $submitXYRGs[3];
	$submitGs = $submitXYRGs[4];

When I go to use the variables ($submitXs, $submitYs, $submitRs, $submitGs) I expect them to be arrays, but I'm getting errors that seem to indicate they are not. What's up? I suspect I'm just not quite understanding how preg_match_all arranges the matches in the variable $submitXYRGs, although my mistake may be more elementary...

There may be a better way to do this whole process, but I figure I'd like to stick with having 4 arrays, each with the same length, arranged so that the index (n) of one array corresponds to the index(n) of the others. With the above code even do that? If not, how would I do so?

Kudose

Here is your script's output.

Array
(
    [0] => Array
        (
            [0] => x27y39r6g4;
            [1] => x28y39r11g26;
            [2] => x29y39r9g14;
            [3] => x30y39r4g13;
            [4] => x31y39r6g4;
            [5] => x32y39r13g6;
            [6] => x33y39r0g5;
        )

[1] => Array
    (
        [0] => x27
        [1] => x28
        [2] => x29
        [3] => x30
        [4] => x31
        [5] => x32
        [6] => x33
    )

[2] => Array
    (
        [0] => y39
        [1] => y39
        [2] => y39
        [3] => y39
        [4] => y39
        [5] => y39
        [6] => y39
    )

[3] => Array
    (
        [0] => r6
        [1] => r11
        [2] => r9
        [3] => r4
        [4] => r6
        [5] => r13
        [6] => r0
    )

[4] => Array
    (
        [0] => g4
        [1] => g26
        [2] => g14
        [3] => g13
        [4] => g4
        [5] => g6
        [6] => g5
    )

)

<?php
  $s = 'x27y39r6g4;x28y39r11g26;x29y39r9g14;x30y39r4g13;x31y39r6g4;x32y39r13g6;x33y39r0g5;';

  $xMatches = preg_match_all ( '/(x\d+)(y\d+)(r\d+)(g\d+);/' , $s , $submitXYRGs, PREG_PATTERN_ORDER);
  $submitXs = $submitXYRGs[1];
  $submitYs = $submitXYRGs[2];
  $submitRs = $submitXYRGs[3];
  $submitGs = $submitXYRGs[4];

  echo '<pre>'; print_r($submitXYRGs);
?>

[man]print_r[/man] is your friend. 🙂

Kudose

How about something like this:

<?php
  $s = 'x27y39r6g4;x28y39r11g26;x29y39r9g14;x30y39r4g13;x31y39r6g4;x32y39r13g6;x33y39r0g5;';

  $sArr = explode(';', $s);
  $allMatches = array();
  foreach($sArr as $key => $value){
    preg_match('#^x(\d+)y(\d+)r(\d+)g(\d+)$#', $value, $matches);
    unset($matches[0]);
    $allMatches[] = $matches;
  }

  echo '<pre>';
  print_r($allMatches);
?>

SWiers

The above code gave me funky results; it seemed to kick out an array of length 1 containing a 4 element array (micely sorted), then an array of length 2 containing 2 4 elelemtn arrays.... on up to the last array containing all the stuff I wanted.

Anyhow, using "explode" pretty much was the simple key to getting the results I wanted. Here's what I ended up with:

<html><head></head><body>
<?PHP
if ($_POST['SIMsubmit']) {
	$s = $_POST['SIMsubmit'];
	$sArr = explode(';', $s);
	$xCoords = array();
	$yCoords = array();
	$rVals = array();
	$gVals = array();
	for ($i=0; $sArr[$i]; $i++) {
    	preg_match('/x(\d+)y(\d+)r(\d+)g(\d+)/', $sArr[$i], $sxyrg);
    	$xCoords[$i] = $sxyrg[1]; 
    	$yCoords[$i] = $sxyrg[2]; 
    	$rVals[$i] = $sxyrg[3]; 
    	$gVals[$i] = $sxyrg[4]; 
    }

// test
    echo '<pre>';  

    for ($i=0; $i<count($xCoords); $i++){
		print("x=$xCoords[$i] y=$yCoords[$i] r=$rVals[$i] g=$gVals[$i] \n") ; 
	}
	echo '</pre>'; 
 // test

}

?>
</body></html>

I'm sure I could use 'foreach" instead of "for", and maybe arrange my arrays a bit fancier, but the above code works very nicely, and is readable to me. For my thinking, its handy to have each of the X, y, r, and g sets in a different variable.