CODEWITHSUNDEEP
phparraysarray-filter
Marc
Marc

Reputation: 9537

PHP array_filter - How to array_filter arrays using multiple keys in the callback function?

  array(  
    [n] => array(

       [mother]   => 'some_name',
       [children] =>  [n] => array(
                               ['child_name']=>'some_name'
                               ...
                             )

         )
   )

I would like to filter this array using the array_filter(). To filter that array to get only the "records" where the mothers are named "Jane" for instance I do the following which is working like a charm.

array_filter($myarray, function ($k) { 
   return $k['mother'] == 'Jane'; 
});

Now I would like to filter $myarray to get the "records" where the children are named "Peter". I tried the following which is not working.

array_filter($myarray, function ($k) { 
    return $k['children']$k['child_name'] == 'Peter'; 
});

I also tried the following which is not working either.

array_filter($myarray, function ($k1,$k2) { 
    return $k1['children']$k2['child_name'] == 'Peter'; 
});

Upvotes: 0

Views: 2298

Answers (1)

kafsoksilo
kafsoksilo

Reputation: 259

You have an error inside the array filter callback function:

$myarray = array(
    array(
       'mother'   => 'Jane',
       'children' =>  array(
            array('child_name' => 'Peter'),
            array('child_name' => 'Peter2')
        )
    ),

    array(
       'mother'   => 'Jane1',
       'children' =>  array(
            array('child_name' => 'Peter1'),
        )
    )
);

//The filtering
$myarray = array_filter($myarray, function ($k) {

    //Loop through childs
    foreach ($k['children'] AS $child)
    {
        //Check if there is at least one child with the required name 
        if ($child['child_name'] === 'Peter')
            return true;
     }

    return false;
});

print_r($myarray);

Upvotes: 3

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