in_array is not working even though i see a match - php

Question

I'm trying to check if there is a duplicate value in a foreach loop.
Here's my attempt which ain't working:
$popup_array = array();
foreach($xml->config->popup as $popup_item)
{
$duplicate_test = $popup_item->attributes()->name;
if (in_array_r($duplicate_test, $popup_array)){
echo "match found for " . $duplicate_test;
}
echo "item: " . $duplicate_test . "<br />";
$popup_array[$i] = $duplicate_test;
$i++;
}
Now i can clearly see there is 2 duplicates, here is what i see at end when i print_r as you can see 2 x default and 2 x lost and the echo also shows default and lost so the in_array is not working and im not sure why:
[0] => SimpleXMLElement Object
(
[0] => Default
)
[1] => SimpleXMLElement Object
(
[0] => Default
)
[2] => SimpleXMLElement Object
(
[0] => pipe
)
[3] => SimpleXMLElement Object
(
[0] => raised
)
[4] => SimpleXMLElement Object
(
[0] => steal
)
[5] => SimpleXMLElement Object
(
[0] => lost
)
[6] => SimpleXMLElement Object
(
[0] => lost
)
[7] => SimpleXMLElement Object
(
[0] => teach
)
[8] => SimpleXMLElement Object
(
[0] => terrain
)
Is there an error in my code? Is it something to do with the simpleXMLEelement and thats turned it into a multidimensional array and i need to search a different way. If i loop through the array and do this:
$popup_length = count($popup_array);
for($x=0;$x<$popup_length;$x++)
{
echo $popup_array[$x];
echo "<br>";
}
It returns:
Default
Default
pipe
raised
steal
lost
lost
teach
terrain

Answer 1

I think, it should be like this
$popup_array = array();
foreach($xml->config->popup as $popup_item)
{
$duplicate_test = (string) $popup_item->attributes()->name;
if (!in_array($duplicate_test, $popup_array)){
$popup_array[] = $duplicate_test;
}
else {
echo "match found for " . $duplicate_test;
}
}
You should check if not in array and then push/add it inside $popup_array, no need to use $i as an index for the array. Also check SimpleXMLElement::attributes.

Answer 2

This value returns an object, not a string:
$popup_item->attributes()->name
So, the objects probably differ by some XML attribute other than name. Try casting to a string, so that your array index is just the name:
$duplicate_test = (string) $popup_item->attributes()->name;

Answer 3

use array_diff
$arr = array(1=>'word',2=>'otherword',3 =>'Hello' ,4=>'hello', 5=>'KKKKK');
//Case Sensitive
$withoutDuplicates = array_unique(array_map("strtoupper", $arr));
$duplicates = array_diff($arr, $withoutDuplicates);
print_r($duplicates);
will print :
Array
(
[3] => Hello
[4] => hello
)