Byksw Terjemah

<?php
function terjemah() {
    echo '
    <center>
    <form method="post">
    <h2>Normal</h2>
    <textarea name="text"></textarea><br />
    <input type="submit" name="submit" value="terjemah" />
    </form>
    <h2>Autis</h2>
    <textarea readonly>';
if($_POST["submit"] == "terjemah") {
    $text=$_POST["text"];
    $output=str_replace("e","w",$text);
    $output2=str_replace("o","w",$output);
    $output3=str_replace("a","w",$output2);
    $output4=str_replace("u","w",$output3);
    $output5=str_replace("i","y",$output4);
    // huruf gede
    $output6=str_replace("E","W",$output5);
    $output7=str_replace("O","W",$output6);
    $output8=str_replace("A","W",$output7);
    $output9=str_replace("U","W",$output8);
    $output10=str_replace("I","Y",$output9);
    echo $output10;
    }
echo "</textarea></center>";
}
terjemah();