How can PHP developers ensure that only the selected option is displayed based on user input?

To ensure that only the selected option is displayed based on user input, PHP developers can use conditional statements to check the user input and display the corresponding option. By using if-else or switch statements, developers can control which option is displayed based on the user's selection. 

$user_input = $_POST['option']; // Assuming the user input is received via POST method

if($user_input == 'option1'){
    echo 'Option 1 is selected';
} elseif($user_input == 'option2'){
    echo 'Option 2 is selected';
} elseif($user_input == 'option3'){
    echo 'Option 3 is selected';
} else {
    echo 'Invalid option selected';
}

Keywords

PHP form handling conditional statements user input validation dropdown menu.

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