How To Access Multidimensional Array Elements to Multiply Them
Question
Create a multidimensional array that contains the measurements, in inches, for several boxes that a shipping company might use to determine the volume of a box.I am having trouble accessing the elements that I actually want. I just need to multiple the 3 integers from length width and depth.
<!DOCTYPE html>
<html>
<head>
<title>DTD and Box Array</title>
</head>
<body>
<?php
$boxArray = array (
'Small Box' => array(12, 10, 2.5),
'Medium Box' => array(30, 20, 4),
'Large Box' => array(60, 40, 11.5)
);
echo '<table border="1">';
echo '<tr><th>Length</th><th>Width</th><th>Depth</th></tr>';
foreach ($boxArray as $k => $v)
{
echo $k.': '.$v[0].' x '.$v[1].' x '.$v[2].' = ' .$v[0]*$v[1]*$v[2].'<br>';
}
foreach( $boxArray as $boxArray )
{
echo '<tr>';
foreach( $boxArray as $key )
{
echo '<td>'.$key.'</td>';
}
echo '</tr>';
}
// Length * width * depth - dont know how get the integers.
// This echo isnt grabbing the integers i want
// Multiply small box length * width * height
?>
</body>
</html>
1 answers
solution1
1 ACCPTED 2016-02-28 15:19:42
1) You seem to be overwriting the $boxArray vaiable in your foreach loop
2) echo $boxArray[1][0] , $boxArray[1][0] ,$boxArray[3,0]; isn't correct, you need echo $boxArray[1][0] .','. $boxArray[1][0] .','. $boxArray[3,0]; echo $boxArray[1][0] .','. $boxArray[1][0] .','. $boxArray[3,0];
3) $boxArray[1][0] references a string "Medium Box"
4) $boxArray[3,0] isn't a correct key reference and would return null
Should the "Small Box", "Medium Box", "Large Box" be array keys?
ie
$boxArray = array ( "Small Box" => array(12,10,2.5), etc... )
I've got a feeling that what you meant to do is this:
$boxArray = array (
'Small Box' => array(12, 10, 2.5),
'Medium Box' => array(30, 20, 4),
'Large Box' => array(60, 40, 11.5)
);
foreach ($boxArray as $k => $v)
{
echo $k.': '.$v[0].' x '.$v[1].' x '.$v[2].' = ' .$v[0]*$v[1]*$v[2].'<br>';
}
If your array is in the correct format:
foreach ($boxArray as $v)
{
echo $v[0].": ".$v[1].' x '.$v[2].' x '.$v[3].' = ' $v[1]*$v[2]*$v[3];
}
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