使用php中的变量作为javascript的警报

Question

how can i use the variable from my php-sql to become the message for my javascript alert?

heres my code

<?php

    $select = "SELECT * FROM post";
    $result = mysql_query($select) or die("couldn't select table");


    while ($rows = mysql_fetch_array($result))
    {
        echo"<input type='button' class=term onclick='return terms()' value=Terms >";

        echo"<input type='hidden' value='$rows[terms]' id='term' name='term'>";
    }
?>  

<script language="JavaScript">
    function terms() 
    {
        var readers = document.getElementById("term"); 
        alert(readers.value);
    }
</script>

It works, the alert message displays. But I got the problem on displaying the right message for specific fetch of row. All got the same message (message from the first row).

I tried to use getElementByName but the alert doesn't pop-up, so i dont have to try making the input name="term[]" --------(into its array form)

Help please!

Answer 1

将while循环内的第二个echo语句更改为：

echo"<input type='hidden' value='". $rows['terms'] ."' id='term' name='term'>";

Answer 2

I think it will be find if you change this line of script

 echo"<input type='button' class=term onclick='terms()' value=Terms >";

onclick='terms()' here, instead of onclick='return terms()'

EDIT:

<?php   echo"<input type='button' class=term onclick='terms(this)' data-result ='". $rows['terms'] ."' value=Terms >"; ?>
      /* Remove the hidden field */
<script language="JavaScript">
    function terms(e) 
    {
        var readers = e.getAttribute('data-result'); 
        alert(readers);
    }
</script>

Answer 3

I usually do the following:

<?php
  function alert($text){
    echo '<script type="text/javascript">alert("'.$text.'")</script>';
  }

  alert("test");
?>

Hope that helps.

Answer 4

You are overwriting the value or "term" in your HTML code after each iteration of While-loop. This way it will only get the last value

Answer 5

All of your input elements have the same id . If you want to distinguish them, give them different identifiers. And pass the identifier to the terms function.

Answer 6

You must give different id for each element. I think simple way to do that is by using auto increment for the id.