how do i call the php function inside the html tag

selvam.cit · #1 (**permalink**) 08-24-06, 07:39 AM

i have file in the name of view.php
it contains

PHP Code:


			
<?

$uname=$_POST['uname1'];

$pass=$_POST['pass1'];

$conn=mysql_connect("localhost","root","") or die("Unable to Connect MySQL");

$dbconn=mysql_select_db("selvam",$conn) or die("Unable to Open Database");

$query="SELECT username FROM table2 WHERE username = '$uname' AND password = '$pass'";

$result=mysql_query($query);

$query_data=mysql_fetch_row($result);

session_start();

session_register("userid", "userpassword");

$currentvalue=$query_data[0];

$session[userid]=$currentvalue;

if(!$session[userid]) {

session_unregister("userid");

session_unregister("userpassword");

echo "<center><font face='Verdana' size='2' color=red>Wrong Login. Use your correct  Userid and Password and Try <br></center>";

echo "<center><input type='button' value='Retry' onClick='history.go(-1)'></center>";

exit;

}

else

{

echo "<center><font face='vardana' size='2' color='red'>Successfully Logged in <b> $session[userid] </b></font></center><br>";

print_r($_session);

?>

<form name="s" action="view.php">

<table align="center"  border="0" cellpadding="5" cellspacing="2">

<tr align="center">

<td><input type="button" value="View Profile" name="b1" onclick="<? f()?>"></td>

<td><input type="button" value="Edit Profile" name="b2"></td>

<td><input type="button" value="Logout" name="b3"></td>

</tr>

</table>

</form>

<?

}

?>

<?

function f()

{

echo "selvam";

}

?>

here my question is

if i click the viewprofile button it shows the error as

Error:'selvam' is undefined.

but i get a confusion if i call just php function then why it show error message.

give idea to me

thanks.

stormshadow · #2 (**permalink**) 08-24-06, 09:39 AM

I didnt go through your script... but in order to call a php function... it MUST be in php tags... so if you are doing html...

Code:

<html>
<title>Inside HTML</title>
<body>
<p>I need to call a function... Here it is...</p>
<p><? $blah = php_function(); echo"$blah"; ?>
</body>
</html>

Do ya get it? it has to be called within the <? and ?> tags...

Nico · #3 (**permalink**) 08-24-06, 09:44 AM

Hm, that is not the problem, I think. You cannot call PHP functions like that. The undefined error is Javascript. It attempts to execute a function onclick. "selvam" isn't a function. That's why you're getting the error. If you tell us what exactly you want to do we might can help a bit more.

selvam.cit · #4 (**permalink**) 08-24-06, 10:08 AM

helllo nico_swd,

my question is how to call the PHP function inside the button.

for example
i write a function as

PHP Code:


			
<?

function f()

{

echo "selvam";

}

?>

can i call this function as

<input type="button" value="function" onclick="<? f(); ?>">

is it possible

this is my question nothing else

Nico · #5 (**permalink**) 08-24-06, 10:14 AM

PHP is on the server, and Javascript is on your computer. You cannot trigger PHP functions without submitting data to the server. You can do something like that:

PHP Code:


			


<form action="" method="post">

<input type="submit" name="submit" value="Submit" />

</form>



<?php



if (isset($_POST['submit']))

{

     f();

}



?>

selvam.cit · #6 (**permalink**) 08-24-06, 10:50 AM

thank u . thanks for your idea nico_swd

infinitylimit · #7 (**permalink**) 08-24-06, 09:25 PM

Just to be on the safe side as well I recommend using <?php ?> tags and not short tags <? ?> because those are used by XML and other languages and can confilict.

Secondly if you just wanted to echo 'selvam' you could use javascript below.

PHP Code:


			
<form name="s" action="view.php">

<table align="center"  border="0" cellpadding="5" cellspacing="2">

<tr align="center">

<td><input type="button" value="View Profile" name="b1" onclick="alert('selvam');"></td>

<td><input type="button" value="Edit Profile" name="b2"></td>

<td><input type="button" value="Logout" name="b3"></td>

</tr>

</table>