Question

I have a simple mysql_query() update command to update mysql.

When a user submits my form, it will jump to an update page to update the data. The problem is that there’s supposed to be some data shown after the update, but it comes out blank.

My form

<form id="form1" method="POST" action="scheduleUpdate.php" >

  <select name=std1>
    <option>AA</option>
    <option>BB</option>
    <option>CC</option>
  </select>

  <select name=std2>
    <option>DD</option>
    <option>EE</option>
    <option>FF</option>
  </select>

.......//more drop down menu but the name is std3..std4..etc...
.......
</form>

scheduleUpdate.php

//$i is the value posted from my main app to tell me how many std we have

for($k=0;$k<$i;$k++){

    $std=$_POST['std'.$k];
//if i remove the updateQuery, the html will output.I know the query is the problem but i //couldn't fix it..
    $updateQuery=mysql_query("UPDATE board SET
                student='$std'
                WHERE badStudent='$std' or goodStudent='$std'",$connection);
        //no output below this line at all
        if($updateQuery){
        DIE('mysql Error:'+mysql_error());
        }

    }

// I have bunch of HTML here....but no output at all!!!!

MySQL will be updated after I hit submit, but it doesn’t shown any HTML.

Answer 1

Your error handling is wrong; $updateQuery evaluates to true on success, so you kill your program on success instead of on an error.