基于php数组动态创建HTML表行

<?php
$colors = array(
    "red" => "FF0000",
    "blue" => "0000FF",
    "green" => "00FF00",
);

$form = "<form action='' method='post'>
              <label for='color'>颜色：</label>
              <input type='text' id='color' name='color' value='{$colors[$_POST['color']]}'>
              <input type='submit' value='提交'>
            </form>";

echo $form;
?>