PHP - seperate array based on characters in key - php

Question

I have a PHP array from a submitted form that looks like the following
$form_data = Array (
[input_1_1] => Product Name
[input_1_2] => $8.00
[input_1_3] => 2
[input_2_1] => Other Product Name
[input_2_2] => $3.50
[input_2_3] => 8
)
I am looking for the best way to parse this so I can build something markup like this:
<table>
<tr>
<td>Product Name</td>
<td>$8.00</td>
<td>2</td>
</tr>
<tr>
<td>Other Product Name</td>
<td>$3.50</td>
<td>8</td>
</tr>
</table>
What would be most kosher way to do this?
Should I split this array into smaller arrays based on the 1st number (and then loop them)?
Alternatively should I just build the markup based on sets of three, like:
<table>
<tr>
<td><?php echo $form_data[1]; ?></td>
<td><?php echo $form_data[2]; ?></td>
<td><?php echo $form_data[3]; ?></td>
</tr>
<tr>
<td><?php echo $form_data[4]; ?></td>
<td><?php echo $form_data[5]; ?></td>
<td><?php echo $form_data[6]; ?></td>
</tr>
</table>
Any help/advice appreciated.

Answer 1

take a look on this example: http://codepad.org/zhKbc4p1
$arr = array('input_1_1'=>'Name', 'input_1_2'=>'$8', 'input_1_3'=>1, 'input_2_1'=>'Name', 'input_2_2'=>'$28', 'input_2_3'=>1);
$chunk = array_chunk($arr, 3);
print_r($chunk);
foreach( $chunk as $val ){
foreach($val as $v){
echo $v . "\r\n";
}
echo "\r\n\r\n";
}
Expected HTML format:
foreach( $chunk as $val ){
echo "<tr>";
foreach($val as $v){
echo "<td>" . $v . "</td>";
}
echo "</tr>";
}

Answer 2

$last_group = '';
foreach ($form_data as $key => $value) {
preg_match('/input_(\d+)/', $key, $match);
if ($match[1] != $last_group) {
if ($last_group) {
echo "</tr>\n";
}
echo "<tr>\n";
$last_group = $match[1];
}
echo "<td>$value</td>\n";
}
if ($last_group) {
echo "</tr>\n";
}
It would be better to structure your form like this, though:
<input type="text" name="name[]">
<input type="text" name="price[]">
<input type="text" name="quantity[]">
Then the $_POST['name'], $_POST['price'] and $_POST['quantity'] will be arrays, and you can iterate over them:
foreach ($_POST['name'] AS $i => $name) {
$price = $_POST['price'][$i];
$quantity = $_POST['quantity'][$i];
// Output the table row
}

Answer 3

Assuming each table row has 3 elements each;
<?php
echo "<table>
<tr>";
$form_data = Array (
"input_1_1" => "Product Name",
"input_1_2" => "$8.00",
"input_1_3" => "2",
"input_2_1" => "Other Product Name",
"input_2_2" => "$3.50",
"input_2_3" => "8"
);
$intRowBefore = 1;
foreach( $form_data as $strKey => $strVal ) {
$intRow = explode("_", $strKey)[1];
if( $intRowBefore != $intRow ) {
echo "</tr><tr>";
$intRowBefore = $intRow;
}
echo "<td>". $strVal ."</td>";
}
echo "</tr></table>";

Answer 4

Consider
<?php
$form_data = array();
$form_data['input_1_1'] = 'Product Name';
$form_data['input_1_2'] = '$8.00';
$form_data['input_1_3'] = '2';
$form_data['input_2_1'] = 'Other Product Name';
$form_data['input_2_2'] = '$3.50';
$form_data['input_2_3'] = '8';
// Get unique keys
function get_unique_keys($keys)
{
$arr = array();
foreach($keys as $k=>$v){
$arr[] = substr($k, 0, strlen($k)-2);
}
return array_unique($arr);
}
$keys = get_unique_keys($form_data);
// Output
printf("<table>\n");
foreach($keys as $k)
{
printf(" <tr>\n");
printf(" <td>%s</td>\n", $form_data[$k.'_1']);
printf(" <td>%s</td>\n", $form_data[$k.'_2']);
printf(" <td>%s</td>\n", $form_data[$k.'_2']);
printf(" </td>\n");
}
printf("</table>\n");
Which outputs:
<table>
<tr>
<td>Product Name</td>
<td>$8.00</td>
<td>$8.00</td>
</td>
<tr>
<td>Other Product Name</td>
<td>$3.50</td>
<td>$3.50</td>
</td>
</table>
See it in action: http://ideone.com/355STr
It's not super complicated. It gets the key "roots" we'll call them (input_1, input_2, etc) and loops over those, appending the additional _1,_2,_3 when needed.
A better solution long-term would be to redesign the form, but that's not always a possibility.

Answer 5

Try This
$form_data = Array (
'[input_1_1]' => 'Product Name',
'[input_1_2]' => '$8.00',
'[input_1_3]' => '2',
'[input_2_1]' => 'Other Product Name',
'[input_2_2]' => '$3.50',
'[input_2_3]' => '8'
);
echo "<table>";
foreach($form_data as $k=>$v)
{
echo "<tr>";
echo "<td>".$v."&lt/td>";
echo "</tr>";
}
echo "</table>";

Answer 6

<?php
$form_data = array(
'input_1_1' => 'Product Name',
'input_1_2' => 8.00,
'input_1_3' => 2,
'input_2_1' => 'Other Product Name',
'input_2_2' => 3.50,
'input_2_3' => 8
);
end($form_data);
$counter = explode('_',key($form_data));
?>
<table>
<?php
$i = 1;
$j = 1;
for ($k = 1; $k <= $counter[1]; $k++) {
?>
<tr>
<td><?php echo $form_data['input_' . $j . '_' . $i]; ?></td>
<td><?php $i++;echo $form_data['input_' . $j . '_' . $i]; ?></td>
<td><?php $i++;echo $form_data['input_' . $j . '_' . $i]; ?></td>
</tr>
<?php
if ($i == 3) {
$i = 1;
$j++;
}
}
?>
</table>