Sort array and rebuild it - php

Question

I have this array:
$all = array(
'meat' => Object(
'name' => 'meat',
'color' => 'red',
'class' => 'food'
),
'chicken' => Object(
'name' => 'chicken',
'color' => 'white',
'class' => 'food'
),
'apple' => Object(
'name' => 'apple',
'color' => 'green',
'class' => 'Fruit'
),
'blueberry' => Object(
'name' => 'blueberry',
'color' => 'blue',
'class' => 'Fruit'
)
);
and i want to Sort it and rebuild it to be like this:
$theright = array(
array(
'class' => 'food',
'menu' => array(
array(
'name' => 'meat',
'color' => 'red',
),
array(
'name' => 'chicken',
'color' => 'white',
)
)
),
array(
'class' => 'Fruit',
'menu' => array(
array(
'name' => 'apple',
'color' => 'green',
),
array(
'name' => 'blueberry',
'color' => 'blue',
)
)
)
);
I tried to Collect all classes in$all array then compare each value with $all array:
$classArray = array();
foreach($all as $key => $value) {
$classArray[$value->class] = array();
}
foreach($classArray as $key => $value) {
$theright[] = array('class' => $key, 'menu' => array());
}
this code get me this array:
$theright = array(
array(
'class' => 'food',
'menu' => array()
),
array(
'class' => 'Fruit',
'menu' => array()
)
);
and i stop here , how to complete it ?

Answer 1

You could just use the class as a key to group them together. Example:
$food = array();
// gather class
foreach($all as $item) {
if(!isset($food[$item->class])) {
$food[$item->class] = array(
'class' => $item->class,
'menu' => array(
array(
'name' => $item->name,
'color' => $item->name,
)
)
);
} else {
$food[$item->class]['menu'][] = array('name' => $item->name,'color' => $item->color,);
}
}
// simple reindex
$food = array_values($food);

Answer 2

There is no need for a second loop. This should do what you want.
$classMap = array();
foreach ($all as $item)
{
// check if class has been created in the class map
if ( ! array_key_exists($classMap, $item['class']))
{
$classMap[$item['class']] = array(
'class' => $item['class'],
'menu' => array()
);
}
$classMap[$item['class']]['menu'][] = array(
'name' => $item['name'],
'color' => $item['color']
);
}

Answer 3

Try with less loop counts (2)
$all = [];
function getSelectClassData(array &$all)
{
$finalArr = [];
while (count($all) > 1) {
$res = [];
$class = array_values($all)[0]->class;
$selectedDataArr = getSelectSimilerMenuData($all, $class);
$res['class'] = $class;
$res['menu'] = array_values($selectedDataArr);
$all = array_diff_key($all,array_flip(array_keys($selectedDataArr)));
$finalArr[] = $res;
}
return $finalArr;
}
function getSelectSimilerMenuData(array $all, $class)
{
return array_filter(
$all,
function ($e) use ($class) {
return $e->class == $class;
}
);
}
print_r(getSelectClassData($all));