What changes can be made to the PHP code to ensure that each date is only displayed once in the party calendar?

To ensure that each date is only displayed once in the party calendar, we can use an array to keep track of the dates that have already been displayed. Before displaying a date, we can check if it exists in the array and only display it if it's not already present. This way, duplicates will be avoided. 

$dates = array();

foreach ($parties as $party) {
    $date = $party['date'];
    
    if (!in_array($date, $dates)) {
        echo $date;
        $dates[] = $date;
    }
}

Keywords

PHP array_unique array_values foreach loop date duplication

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