What are common pitfalls when displaying duplicate values in a select box in PHP?

When displaying duplicate values in a select box in PHP, a common pitfall is that the duplicates may cause confusion for the user and lead to errors in processing the form data. To solve this issue, you can filter out the duplicate values before populating the select box. 

<?php
// Sample array with duplicate values
$values = array("Apple", "Banana", "Apple", "Orange", "Banana");

// Remove duplicates
$unique_values = array_unique($values);

// Create select box
echo "<select>";
foreach($unique_values as $value){
    echo "<option value='$value'>$value</option>";
}
echo "</select>";
?>

Keywords

PHP select box duplicate values display pitfalls

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