wordpress check if value exist in array

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I’m trying to compare one input field i get from submit form, But even if number is correct it won’t echo success. 

global $wpdb;

$name = $_POST['name'];
$phone = $_POST['surname'];
$kunde = $_POST['kunde'];
$login = $wpdb->get_results( "SELECT kunde FROM wp_kundenumber", ARRAY_N );
$kunde_string = end(explode(' ', $kunde));



if(in_array($kunde_string, $login)){

echo "succes";
}
 else {
echo "failure";
}

EDIT: these are var dumps of variables:

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for kunde_string it says string(6) "100001"

and $login is a big array array(9807) { [0]=> array(1) { [0]=> string(6) "100001" } [1]=> array(1) { [0]=> string(6) "100002" } [2]=> array(1) { [0]=> string(6) "100003" }...

Post Views: 2

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2 comments

  1. you can use array_map php function instead of foreach loop, then use in_array to find value..

    $login = $wpdb->get_results( "SELECT kunde FROM wp_kundenumber", ARRAY_N );
$dataArray = array_map(function ($arr) {return $arr[0];}, $login); //will return single dimentional array of value at 0 index in $login items
if(in_array($kunde_string, $dataArray)) ///then in_array will work for you.. to find $kunde_string
{
    echo "Succes";
}
else 
{
    echo "Failure";
}

  2. Check in_array with foreach

    Try as follows 

     global $wpdb;

    $name = $_POST['name'];
    $phone = $_POST['surname'];
    $kunde = $_POST['kunde'];
    $login = $wpdb->get_results( "SELECT kunde FROM wp_kundenumber", ARRAY_N );
    $kunde_string = end(explode(' ', $kunde));
    $flag = false; 
        foreach($login as $value)
        {
            if(in_array($kunde_string, $value, true))
            {
               $flag = true; 

            } 
        }
        if($flag == true){

              echo "succes";
        }else {
             echo "failure";
        }