Question

Please help me to solve one problem that I am really stuck in PHP

I have one big array

$a = array(
    'foo_1' => 'Dog',
    'bar_1' => 'Cat',
    'baz_1' => 'Fish',
    'foo_2' => 'Frog',
    'bar_2' => 'Bug',
    'baz_2' => 'Ddd',
    ...
);

and it needs to be transformed in multiple arrays:

$a_1 = array(
    'foo' => 'Dog',
    'bar' => 'Cat',
    'baz' => 'Fish'
);  

$a_2 = array(
    'foo' => 'Frog',
    'bar' => 'Bug',
    'baz' => 'Ddd'
);

As you noticed there is a small logic. The big array should be splited by sets of keys ( _1,_2,_3 ; _1,_2,_33 )

Hope I was clear enough!

Thanks

Answer 1

Assuming $a has this structure (because OP original array has duplicate keys):

$a = array(
'foo_1' => 'Dog',
'bar_1' => 'Cat',
'baz_1' => 'Fish',
'foo_2' => 'Frog',
'bar_2' => 'Bug',
'baz_2' => 'Ddd'
);

You can transform array by this approach:

$temp = array();
foreach($a as $key=>$val){
    $num = substr(strrchr($key, '_'), 1);
    $nkey = basename($key, '_'.$num);
    $temp[$num][$nkey] = $val;
}
// See what happens
print_r($temp);