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Calling Javascript function within php

gsashwin

By gsashwin
in PHP Coding Help

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gsashwin Newbie

gsashwin

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Posted

Hi guys,

 

          I am having a tough time executing the code inside the javascript. Everything is working fine with the Php code and I am able to see the output of variable myValue too.. But the problem is nothing is being executed inside the javascript..Not even the first statement of the javascript..When I look at the output sent by the HTML to the browser, the output is what is listed after this code which is right at the bottom of this page. Please advise.

 

<html>
<head>

<title>AES (Rijndael) Encryption Test in JavaScript</title>
<script src="aes-enc.js" type="text/javascript" language="JavaScript"></script>
<script src="aes-dec.js" type="text/javascript" language="JavaScript"></script>
<script src="aes-test.js" type="text/javascript" language="JavaScript"></script>
<script type="text/javascript">

   function doDecryption()
                {
                document.println("Inside Javascript");
                var ct, key;
                var theForm = document.forms[0];
                blockSizeInBits=128;
                keySizeInBits = theForm.keySize[theForm.keySize.selectedIndex].value;

                if (theForm.key.value.toLowerCase().indexOf("0x") == 0)
                theForm.key.value = theForm.key.value.substring(2);
                if (theForm.ciphertext.value.toLowerCase().indexOf("0x") == 0)
                theForm.ciphertext.value = theForm.ciphertext.value.substring(2);

                if (theForm.key.value.length*4 != keySizeInBits)
{
                alert("For a " + keySizeInBits + " bit key, the hex string needs to be " +
                (keySizeInBits / 4) + " hex characters long.");
                if (theForm.key.select)
                theForm.key.select();
                return;
}

      if (theForm.ciphertext.value.length*4 != blockSizeInBits)
{
        alert("For a " + blockSizeInBits + " bit block, the hex ciphertext string needs to be " +
              (blockSizeInBits / 4) + " hex characters long.");
        if (theForm.ciphertext.select)
           theForm.ciphertext.select();
        return;
      }

      ct = hex2s(<?php echo $myValue; ?>);
      document.println("Inside Javascript");
      document.write(ct);
     // key = hex2s(theForm.key.value);
     // theForm.plaintext.value = byteArrayToHex(rijndaelDecrypt(ct, key, "ECB"));


                }


</script>
</head>
[syntax=php]
<?php
    mysql_connect("localhost","root","");
    mysql_select_db("encryption") or die(mysql_error());
    $userId = $_POST['userId'];


        if (($_SERVER['REQUEST_METHOD'] == 'POST') && ($_POST['key'] == ""))
        {

            $query = mysql_query("select * from employee_details where id = '$userId'");
                if($row=mysql_fetch_assoc($query))
                    {
                        echo '<tr>';
                        foreach($row as $value)
                        echo '<td>'.$value.'</td>';
                        echo '</tr>';
                    }

                else { echo "No rows returned"; }}
        else if (($_SERVER['REQUEST_METHOD'] == 'POST') && ($_POST['key']))
            {

               $columname = "ciphertext";
               $tablename = "employee_details";
               
               

                    function getField($field, $tbl_name, $condition)
                {
                    
                    $result = mysql_query("SELECT $field FROM $tbl_name WHERE id = ".$condition);

                     return @mysql_result($result, 0);
                }

                    $myValue = getField($columname,$tablename,$userId);

                    echo "$myValue";
                    //doDecryption();

            }
            echo '<script type="text/javascript">
    doDecryption();
    </script>';
    echo "whats happening";
?>
</body>
</html>
[/syntax]
<body>

 

 

 

 

CODE THAT IS SENT AS HTML OUTPUT TO THE BROWSWER

 


<!doctype HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html> 
<head> 
<title>AES (Rijndael) Encryption Test in JavaScript</title> 
<script src="aes-enc.js" type="text/javascript" language="JavaScript"></script> 
<script src="aes-dec.js" type="text/javascript" language="JavaScript"></script> 
<script src="aes-test.js" type="text/javascript" language="JavaScript"></script> 
<script type="text/javascript" language="JavaScript"> 

   function doDecryption()
                {
                document.alert("Inside Javascript");
                var ct, key;
                var theForm = document.forms[0];
                blockSizeInBits=128;
                keySizeInBits = theForm.keySize[theForm.keySize.selectedIndex].value;

                if (theForm.key.value.toLowerCase().indexOf("0x") == 0)
                theForm.key.value = theForm.key.value.substring(2);
                if (theForm.ciphertext.value.toLowerCase().indexOf("0x") == 0)
                theForm.ciphertext.value = theForm.ciphertext.value.substring(2);

                if (theForm.key.value.length*4 != keySizeInBits)
{
                alert("For a " + keySizeInBits + " bit key, the hex string needs to be " +
                (keySizeInBits / 4) + " hex characters long.");
                if (theForm.key.select)
                theForm.key.select();
                return;
}

      if (theForm.ciphertext.value.length*4 != blockSizeInBits)
{
        alert("For a " + blockSizeInBits + " bit block, the hex ciphertext string needs to be " +
              (blockSizeInBits / 4) + " hex characters long.");
        if (theForm.ciphertext.select)
           theForm.ciphertext.select();
        return;
      }

      ct = hex2s(<br />
<b>Notice</b>:  Undefined variable: myValue in <b>C:\wamp\www\AES4U\Decryptedresults.php</b> on line <b>41</b><br />
);
      document.write("Inside Javascript");
      document.write(ct);
     // key = hex2s(theForm.key.value);
     // theForm.plaintext.value = byteArrayToHex(rijndaelDecrypt(ct, key, "ECB"));


                }


</script> 
</head> 

<body> 
<br /> 
<b>Notice</b>:  Undefined index: userId in <b>C:\wamp\www\AES4U\Decryptedresults.php</b> on line <b>58</b><br />  // Do not worry about this notice because teh value has not been posted it is not able find this value.  
</body>

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