echo multidimensional array by grouping php - php

Question

$list = array(
array(
'header_name' => '1.',
'header_database_name' => '2',
'heading' => 'personal',
),
array(
'header_name' => '11. ',
'header_database_name' => '22',
'heading' => 'professional',
),
array(
'header_name' => '33',
'header_database_name' => '333',
'heading' => 'personal',
),
);
foreach($list as $li)
{
?>
"> ';}
else ($li['heading'] == 'performance')
{echo $li['header_name'].'';}
}
I need to print this array by grouping it by heading for example the one with heading as personal should be displayed under the personal title i.e:
Personal
1
33
Professional
11
my php code is like this
foreach($list as $li)
{
?>
"> ';}
else ($li['heading'] == 'performance')
{echo $li['header_name'].'';}
}
It is printing by group but i also need heading to be added but only one time at the top for example now if i add heading to it it prints as personal 1
professional 2
peronal 3
but i need as
personal
1
2
professional
2

Answer 1

You need to sort array if you want grouping of data, use usort
function headingSort ($x, $y) {
return strcasecmp($x['heading'], $y['heading']);
}
usort($myArray, 'headingSort');

Answer 2

Use like
$new_array = array();
foreach($list as $k=>$v)
{
if(!in_array($v['header_name'], $new_array))
$new_array[$v['heading']][] = $v['header_name'];
else
$new_array[$v['heading']] = $v['header_name'];
}
print_r($new_array);

Answer 3

Try this :
$list = array(
array(
'header_name' => '1.',
'header_database_name' => '2',
'heading' => 'personal',
),
array(
'header_name' => '11. ',
'header_database_name' => '22',
'heading' => 'professional',
),
array(
'header_name' => '33',
'header_database_name' => '333',
'heading' => 'personal',
)
);
$personal = array();
$professional = array();
for($i=0;$i<count($list);$i++){
if($list[$i]['heading']=="professional"){
array_push($professional,$list[$i]);
}else{
array_push($personal,$list[$i]);
}
}
$new = array(
"personal"=>$personal,
"professional"=>$professional
);
echo "<pre>";
print_r($new);
Result will be like :
Array
(
[personal] => Array
(
[0] => Array
(
[header_name] => 1.
[header_database_name] => 2
[heading] => personal
)
[1] => Array
(
[header_name] => 33
[header_database_name] => 333
[heading] => personal
)
)
[professional] => Array
(
[0] => Array
(
[header_name] => 11.
[header_database_name] => 22
[heading] => professional
)
)
)

Answer 4

The solution using array_column(available since PHP 5.5), array_unique, array_keys and implode functions:
$headings = array_column($list, 'heading', 'header_name');
foreach (array_unique($headings) as $v) {
echo ucfirst($v). PHP_EOL;
echo implode("\n", array_keys($headings, $v)). PHP_EOL;
}
The output:
Personal
1
33
Professional
11