[RESOLVED] retrieveng a POST with a variable in its name

[garnetquagga]

I'm trying to pass a multidimensional array, which I hear can't be done. So what I've done to get around it is this:

for ($i = 1; $i <= $size; $i++) {
for ($j = 1; $j <= $size; $j++) {
echo ('<input type="hidden" name="cell'.$i.$j.'b" value="'.$cell[$i][$j][block].'" />');
echo ('<input type="hidden" name="cell'.$i.$j.'s" value="'.$cell[$i][$j][status].'" />');
echo ('<input type="hidden" name="cell'.$i.$j.'a" value="'.$cell[$i][$j][answerval].'" />');

  }

}

This is part of a form and I have used an echo to make sure that, for example, $cell[$i][$j][answerval] is correctly assigned a value. Yes, I have submitted the form to the target and now I'm trying to retrieve the values with this:

for ($i = 1; $i <= $size; $i++) {
for ($j = 1; $j <= $size; $j++) {
$cell["$i"]["$j"][block]=$POST["cell$i$jb"];
$cell["$i"]["$j"][status]=$POST["cell$i$js"];
$cell["$i"]["$j"][answerval]=$_POST["cell$i$ja"];
}
}

I must be making some inanely simple mistake in syntax because everything I retrieve is blank. How can I make this work?

[bradgrafelman]

garnetguagga wrote:

I'm trying to pass a multidimensional array, which I hear can't be done.

Where did you hear that? That's certainly incorrect...

<input type="text" name="array[0][]" />

[garnetquagga]

I saw on a website that it couldn't be done. So you mean if I did this:

echo ('<input type="hidden" name="cell[][][]" value="'.$cell.'" />');

I could retrieve it with:

$cell=$_POST['cell'];

?

[bradgrafelman]

$_POST['cell'] should be a multi-dimensional array, yes.

[garnetquagga]

OK here's what I have:

     echo '<form action="grid.php" method="post">';
        //X drop-down box
		   echo 'Row: <select name="X">';
           for ($x=1; $x <= $size; $x++){
	          echo "<option value=\"$x\">$x</option>\n";
           }
           echo '</select>';
        //Y drop-down box
           echo 'Column: <select name="Y">';
           for ($y=1; $y <= $size; $y++){
	          echo "<option value=\"$y\">$y</option>\n";
           }
           echo '</select>';
        //Value drop-down box
           echo 'Value: <select name="fval">';
           for ($z=1; $z <= $size; $z++){
              echo "<option value=\"$z\">$z</option>\n";
           }
        echo ('<input type="hidden" name="cell[][][]" value="'.$cell.'" />');
        echo '<input type="submit" name="enterfval" value="Enter Fixed Value" />';
     echo '</form>';

if (isset($_POST['enterfval'])) {

$x=$POST['X'];
$y=$POST['Y'];
$fval=$POST['fval'];
$cell=$POST['cell'];
echo ('current fixed value of cell '.$x.','.$y.' is '.$cell[$x][$y][answerval]);
$cell[$x][$y][answerval]=$fval;
$cell[$x][$y][status]=2;
}

The output is :

current fixed value of cell 2,4 is

What am I missing?

[bradgrafelman]

$_POST['cell'][0][0][0] should contain the data you're after.

Do a [man]print_r/man on $_POST['cell'] and show us the structure of the array.

[classix16]

how about this:

for ($i = 1; $i <= $size; $i++) {
for ($j = 1; $j <= $size; $j++) {
echo ('<input type="hidden" name="cell'.$i.$j.'b" value="'.$cell[$i][$j]['block'].'" />');
echo ('<input type="hidden" name="cell'.$i.$j.'s" value="'.$cell[$i][$j]['status'].'" />');
echo ('<input type="hidden" name="cell'.$i.$j.'a" value="'.$cell[$i][$j]['answerval'].'" />');

  }

}
//and
for ($i = 1; $i <= $size; $i++) {
for ($j = 1; $j <= $size; $j++) {
$cell["$i"]["$j"]['block']=$POST["cell$i$jb"];
$cell["$i"]["$j"]['status']=$POST["cell$i$js"];
$cell["$i"]["$j"]['answerval']=$_POST["cell$i$ja"];
}
}

(sorry my english not so well 😃 )
in array u have to use \' if a string
ex: $arr['test']
but u don't have to use \' if it's an integer
ex: $arr[1]

sory if i mistake

garnetquagga wrote:

I'm trying to pass a multidimensional array, which I hear can't be done. So what I've done to get around it is this:

for ($i = 1; $i <= $size; $i++) {
for ($j = 1; $j <= $size; $j++) {
echo ('<input type="hidden" name="cell'.$i.$j.'b" value="'.$cell[$i][$j][block].'" />');
echo ('<input type="hidden" name="cell'.$i.$j.'s" value="'.$cell[$i][$j][status].'" />');
echo ('<input type="hidden" name="cell'.$i.$j.'a" value="'.$cell[$i][$j][answerval].'" />');

  }

}

This is part of a form and I have used an echo to make sure that, for example, $cell[$i][$j][answerval] is correctly assigned a value. Yes, I have submitted the form to the target and now I'm trying to retrieve the values with this:

for ($i = 1; $i <= $size; $i++) {
for ($j = 1; $j <= $size; $j++) {
$cell["$i"]["$j"][block]=$POST["cell$i$jb"];
$cell["$i"]["$j"][status]=$POST["cell$i$js"];
$cell["$i"]["$j"][answerval]=$_POST["cell$i$ja"];
}
}

I must be making some inanely simple mistake in syntax because everything I retrieve is blank. How can I make this work?

[garnetquagga]

bradgrafelman wrote:

$_POST['cell'][0][0][0] should contain the data you're after.

Do a [man]print_r/man on $_POST['cell'] and show us the structure of the array.

Before submit, print_r($cell); gives me:

Array ( [1] => Array ( [1] => Array ( => 1 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) [2] => Array ( => 1 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) [3] => Array ( => 2 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) [4] => Array ( => 2 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) ) [2] => Array ( [1] => Array ( => 1 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) [2] => Array ( => 1 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) [3] => Array ( => 2 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) [4] => Array ( => 2 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) ) [3] => Array ( [1] => Array ( => 3 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) [2] => Array ( => 3 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) [3] => Array ( [b] => 4 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) [4] => Array ( [b] => 4 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) ) [4] => Array ( [1] => Array ( [b] => 3 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) [2] => Array ( [b] => 3 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) [3] => Array ( [b] => 4 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) [4] => Array ( [b] => 4 [status] => 0 [answerval] => 0 [chosenval] => 0 [problems] => 0 [possibles] => 12 34 ) ) )

(Note: I have fixed the $size variable to 4 for development.)

I submitted it with:

        echo ('<input type="hidden" name="cell[][][]" value="'.$cell.'" />');

and retrieved it with:

$cell=$POST['cell'];
print_r($POST['cell'][0][0][0]);
echo ('current fixed value of cell '.$x.','.$y.' is '.$cell[$x][$y][answerval]);

and got this result:

Arraycurrent fixed value of cell 2,3 is

I'm going to look very carefully at classix16's syntax and see how it's different from what I did before. Maybe the light will dawn...

[garnetquagga]

I figured it out. Duh!

My reference of $POST['"cell$i$jb"]; was ambiguous and was fixed when I changed it to $POST["cell$i{$j}b"];

It was looking for a variable $jb which didn't exist. I knew it was something inane. Thank for the help. It made me look at a lot of things I might not have looked at before.

[reddrum]

I know this thread is marked resolved but I am curious as to how Brad’s example works.
If I do this:

<?php
$test = array(1, 2, 3, 4);
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
    "http://www.w3.org/TR/html4/loose.dtd">
<html>

<head>
  <title></title>
</head>

<body>
<?php
   print_r($_POST['int1']);
?>
<form name="frm1" action="#" method="post">
   <?php print"<input type='hidden' name='int1[]' value='{$test}' />"; ?>
   <input type="submit" name="submit" value="submit">
</form>
</body>
</html>

I get: Array([0]=>Array)
What am I missing?

[garnetquagga]

I would have loved to have used an easy, slick way too. Someone needs to put up a manual page somewhere (I think I've looked everywhere) about passing multidimensional (I mean 3 or 4 or 5 dimensional) arrays through a form using the post method and being able to retrieve them successfully on the target page. I've seen several similar questions but no one has yet shown how it can be done successfully. If someone knows where this info is or has done it, I (and others) would really appreciate it. :rolleyes: