Find duplicate array values and delete conditionally - php

Question

I have an multidimensional array like this:
$orders = array(
array(
'id' => '123',
'name' => 'John',
'lastname'=>'Carter',
'rate' => '1.0'
),
array(
'id' => '546',
'name' => 'Ben',
'lastname'=>'Wall',
'rate' => '0.25'
),
array(
'id' => '666',
'name' => 'John Bow',
'lastname'=>'Porter',
'rate' => '0.25'
),
array(
'id' => '156',
'name' => 'John',
'lastname'=>'Carter',
'rate' => '0.5'
)
);
and want make a function that will be delete duplicate rows that rate < 1.0. The result array should be:
$orders = array(
array(
'id' => '123',
'name' => 'John',
'lastname'=>'Carter',
'rate' => '1.0'
),
array(
'id' => '546',
'name' => 'Ben',
'lastname'=>'Wall',
'rate' => '0.25'
),
array(
'id' => '666',
'name' => 'John',
'lastname'=>'Porter',
'rate' => '0.25'
)
);

Answer 1

Not very beautiful and speed, but workable solution:
$a = array(...); // Your array
$hashstack = array_map(function($value) { return md5($value['name'] . $value['lastname']); }, $a);
$result = array_filter($a, function($value) use ($hashstack)
{
if ((float)$value['rate'] < 1.0) {
$count = 0;
foreach ($hashstack as $hash) {
if (md5($value['name'] . $value['lastname']) == $hash) {
$count++;
}
}
if ($count > 1) {
unset($value);
return;
}
}
return $value;
});
Result is the same of yours.

Answer 2

Edit: Second and good version here: http://ideone.com/zJ8vj
What do You mean by 'duplicated' - same 'rate' ?
Bellow example remove duplicated orders with same 'rate' and 'rate' < 1.0.
Is this what You need ?
$tmpOrders = array();
foreach($orders as $order) {
// Check only rate < 1.0
if((float)$order['rate'] < 1.0) {
// Check duplicate
$exists = false;
foreach($tmpOrders as $tmp) {
if($tmp['rate'] == $order['rate']) {
$exists = true;
break;
}
}
// Add if rate not exists
if(!$exists) {
$tmpOrders[] = $order;
}
}
// Add all with rate >= 1.0
else {
$tmpOrders[] = $order;
}
}
$orders = $tmpOrders;
echo "<pre>";
print_r($orders);
echo "<pre>";
Result:
Array
(
[0] => Array
(
[id] => 123
[name] => John
[lastname] => Carter
[rate] => 1.0
)
[1] => Array
(
[id] => 546
[name] => Ben
[lastname] => Wall
[rate] => 0.25
)
[2] => Array
(
[id] => 156
[name] => John
[lastname] => Carter
[rate] => 0.5
)
)