将PHP变量传递给Javascript无法正常工作

Question

我正在尝试将php变量传递给javascript，但它似乎不起作用。我知道它只适用于javascript，只是当我试图用PHP传递它时它不起作用。我做错了什么？

<?php

$sayIt = "Hello";

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

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

</script>
";

?>

Answer 1

它不起作用，因为PHP将解释这样的代码：

<script type = 'text/javascript'>

var msg = new SpeechSynthesisUtterance(Hello);
window.speechSynthesis.speak(msg);

</script>

然后JavaScript会将Hello视为一个变量，可能没有在JavaScript中定义，你可能会这样写：

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

var msg = new SpeechSynthesisUtterance(\"$sayIt\");

window.speechSynthesis.speak(msg);

";

然后它将被解释为：

<script type = 'text/javascript'>

var msg = new SpeechSynthesisUtterance("Hello");
window.speechSynthesis.speak(msg);

</script>

希望它会对你有所帮助！