如何在php中设置选定下拉列表的值？

Question

I am trouble to set the value of selected option value in PHP. At the time of fetching data in MySQL i haven't set the selected value of dropdown in PHP.

function get_document_name($documents_name)
{
    $output = "";
    foreach ($documents_name as $small_letter => $cap_letter) {
        $selected = ($document_name == $cap_letter) ? 'selected' : '';
        $output .= "<option value='".$small_letter."'".$selected.">".$cap_letter."</option>";
    }

    return $output;
}

Answer 1

Try using below solution. If your if condition doesn't matches, then display normal select option and if matches, then show selected.

function get_document_name($documents_name)
{
    $output = "";
    foreach ($documents_name as $small_letter => $cap_letter)
    {
        if( $document_name != $cap_letter )
        {
            $output .= "<option value='".$small_letter."'>".$cap_letter."</option>";
        }
        else
        {
            $output .= "<option value='".$small_letter."' 'selected'='selected'>".$cap_letter."</option>";
        }
    }
    return $output;
}