How to remove all same values from an array in php-CodePudding

I have tried to remove all duplicate values from an array. With array_unique it's not possible to delete all same values.

My array is

array:5 [▼
 0 => "Sat 2"
 1 => "Sun 3"
 2 => "Mon 4"
 3 => "Tue 5"
 4 => "Mon 4"
]

So, basically, I want to remove "Mon 4".

So, the array should look like below:

0 => "Sat 2"
1 => "Sun 3"
3 => "Tue 5"

My code attempt:

$dates = array();
    $current = strtotime($first);
    $last = strtotime($last);

    while( $current <= $last ) {

        //if (date("D", $current) != date('D', strtotime($company_settings->holidays)))

        $dates[] = date($output_format, $current);
        $current = strtotime($step, $current);
    }

    foreach ($arr_holidays as $holi) {
        array_push($dates, $holi);
    }

    $result = array();
    foreach ($dates as $key => $value){
        if(!in_array($value, $result))
            $result[$key]=$value;
    }
    
    dd($dates);

Do you have any solution regarding this?

Thanks in advance.

CodePudding user response：

I am assuming that array contains all string data,so you can do it like below:

$valuesCounterArr = array_count_values($array);
$finalArr = [];
foreach($valuesCounterArr as $key=>$val){
    if($val == 1){
        $finalArr[] = $key;
    }
}

print_r($finalArr);

https://3v4l.org/1lc6R

CodePudding user response：

Removing all values from the array that exist more than once is equivalent to keeping all values that only exist once. This condition can be defined with a function which can easily be modified for other tasks.

$condition = function($count){
  return $count == 1;
};

Now we determine the number of values with array_count_values and filter them with our condition. The keys are then our desired result.

$result = array_keys(array_filter(array_count_values($arr),$condition));

Example with an extended array for testing yourself on https://3v4l.org/0KEdZ

CodePudding user response：

You can use the combination of array_diff, array_diff_assoc and array_unique and avoid loops for better performance.

$arr = [
    0 => "Sat 2",
    1 => "Sun 3",
    2 => "Mon 4",
    3 => "Tue 5",
    4 => "Mon 4",
   ];
$arr = array_diff($arr, array_diff_assoc($arr, array_unique($arr)));
print_r($arr);

So your output will be like this :

[0] => Sat 2 
[1] => Sun 3 
[3] => Tue 5

https://3v4l.org/3K8ue