Loop through json array and group by key values - php

Question

After json_decode I have the following Array :::
$json = Array ( [name] => Array ( [0] => Peter [1] => David ) [dep] => Array ( [0] => accounts [1] => sales ) [date] => Array ( [0] => 10/27/2015 [1] => 09/25/2015 ) );
How can I group the values by key so I get the following in a PHP foreach loop ? :::
<ul>
<li>Peter, accounts, 10/27/2015</li>
<li>David, sales, 09/25/2015</li>
</ul>
I've tried a similar foreach loop ( see below ) without the desired results, I'm able to print all the key & value's but I'm not able to group values by key eg. [1] :::
foreach($json as $row){
foreach($row as $key=>$val){
echo $key . ': ' . $val . '<br>';
}
}
Any assistance would be appreciated :::

Answer 1

You could use the following code to sort the list:
<?php
$json = [
"name" => ["Peter","David"],
"dep" => ["accounts", "sales"],
"date" => ["10/27/2015","09/25/2015"]
];
$final = [];
foreach($json as $section)
{
foreach($section as $key=>$info)
{
if(!isset($final[$key])) $final[$key] = "";
$final[$key] .= $info . ", ";
}
}
echo "<ul>";
foreach($final as $row)
{
echo "<li>" . substr($row, 0, strlen($row) - 2) . "</li>"; // -2 to remove the extra ", "
}
echo "</ul>";
?>
Result:
<ul>
<li>Peter, accounts, 10/27/2015</li>
<li>David, sales, 09/25/2015</li>
</ul>

Answer 2

Perhaps try something like this:
$arrayCount = count($json['name']);
$output = '<ul>';
for($i = 0; $i < $arrayCount; $i++) {
$output .= '<li>';
$output .= $json['name'][$i] . ', ';
$output .= $json['dep'][$i] . ', ';
$output .= $json['date'][$i];
$output .= '</li>';
}
$output .= '</ul>';
echo $output;
You would also be better off using an array format like this:
$json =
Array(
Array(
'name' => 'Peter',
'dep' => 'accounts',
'date' => '10/27/2015'
),
Array(
'name' => 'David',
'dep' => 'accounts',
'date' => '09/25/2015'
)
);
This is because you can create a easier to understand foreach loop like this:
$output = '<ul>';
foreach($json as $row) {
$output .= '<li>';
$output .= $row['name'] . ', ';
$output .= $row['dep'] . ', ';
$output .= $row['date'];
$output .= '</li>';
}
$output .= '</ul>';
echo $output;