使用ajax从数据库中获取字符串，将其拆分为一半，然后将其转换为语音

Question

我正在尝试使用ajax从我的数据库中获取字符串，回显整个字符串，然后将字符串分成两半，并将其转换为语音。除了一步，我已经完成了每一步。我从我的数据库中获取了完整的字符串，并成功将其分成两半。这是我遇到麻烦的最后一步：

我遇到麻烦的部分

echo "
<script type = 'text/javascript'>

var msg = new SpeechSynthesisUtterance('$partOfString');
window.speechSynthesis.speak(msg);

</script>
";

?>

test1.php

<script type = "text/javascript"> 

   function ajaxPass(gotoUrl,input,output) {

      $.ajax({
           type: "POST",
           url: gotoUrl,
           data: { input : input },
           error: function(xhr,status,error){alert(error);},
           success:function(data) {
           document.getElementById( output ).innerHTML = data;
           }

      });

}

</script>

<input type = "button" value = "Click me" onclick = "ajaxPass('test2.php','Hello','output')"> 
<div id = 'output'> </div>

test2.php

<?php

$text = $_POST['input'];

//Use $text to get a string from database

echo $text; //echo the string we get from database
$partOfString //split the string in half and store in partOfString

echo "
<script type = 'text/javascript'>

var msg = new SpeechSynthesisUtterance('$partOfString');
window.speechSynthesis.speak(msg);

</script>
";

?>