PHP 使用 Java 更改 Span Id 内部 Html

Question

我正在尝试从php echo语句更改 span id 内部 html 文本。为此，我编写了下面的代码，但它在document.getElementById行中给出了语法错误

if ($con->query("SELECT question_id FROM saved_questions WHERE question_id='".$quiz_question['id']."' and user_id='".$this->session->userdata('user_id')."'")->num_rows > 0) 
{
  echo ('
   <SCRIPT LANGUAGE="JavaScript">
      document.getElementById("btn-save'".$quiz_question['id']."'").innerHTML="newtext"; //syntex error in this line
   </SCRIPT>');

}

怎么了

Answer 1

我建议您删除echo并使用普通输出：

if ($con->query("SELECT question_id FROM saved_questions WHERE question_id='".$quiz_question['id']."' and user_id='".$this->session->userdata('user_id')."'")->num_rows > 0) 
{?>
   <SCRIPT LANGUAGE="JavaScript">
      document.getElementById("btn-save<?php echo $quiz_question['id']?>").innerHTML="newtext";
   </SCRIPT>
<?php
}