What are some common mistakes to watch out for when trying to modify existing radio button selections using PHP code?

When trying to modify existing radio button selections using PHP code, a common mistake is not properly setting the 'checked' attribute for the desired radio button option. To solve this, you need to dynamically generate the radio buttons with the 'checked' attribute set for the option that matches the existing selection. 

// Example code to modify existing radio button selections
$selectedOption = 'option2'; // Existing selection
$options = ['option1', 'option2', 'option3']; // Radio button options

foreach ($options as $option) {
    $checked = ($option == $selectedOption) ? 'checked' : ''; // Set 'checked' attribute for existing selection
    echo "<input type='radio' name='radio_options' value='$option' $checked> $option<br>";
}

Keywords

PHP radio buttons modification selection errors

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