javascript文件不会在php中触发

Question

php:

<?php
if (empty($itemId)|| (empty($title) && $title==="Please Select") 
   || empty($subtitle) || empty($descript)
    ||   empty($availability)
    || empty($price) || empty($filename))
  {
     echo "<script type='text/javascript'>
";
    'emptyfield()';
    echo "</script>";
  }
>?

javascript:

 function emptyfield()
 {
if(document.forms ["add"] ["save"].value !== "")


 {

   document.getElementById('display').innerHTML="Please fill the blank fields!!!";

 }
 }

The java script file does not trigger in the php file. When I click the submit button, I need the div to be displayed as "Please fill the blank fields". But it does not happen in my case.

Answer 1

echo "<script type='text/javascript'>
";
'emptyfield()';
echo "</script>";

I think you forgot to echo the 'emptyfield()'; in php.