PHP and HTML/XHTML?

snelll · October 18th, 2008, 07:01 PM

This might be a nOOb question,
In PHP do u have the HTML and the php just fits in like javascript(<script... ),
Please reply

joonty · October 18th, 2008, 09:30 PM

Yes, in a sense, although Javascript can be part of an html extension file (e.g. mypage.html), whereas PHP script can only run on a php file (e.g. mypage.php). However, if an html extension is changed to a php extension the way that the html is read remains the same. PHP code is written in the following format:

Code:


			
<?php
...
some code
...
?>

Javascript runs in a users browser ("client-side") and PHP runs on the web server before it reaches the user ("server-side").

j

snelll · October 18th, 2008, 09:31 PM

so ermm u can use all the html stuff in a php file aswell as the actual php?

Marc · October 19th, 2008, 04:27 AM

If you want to use some HTML, you need to PRINT it in PHP so like so:

Code:


			
<?php
print "<head>";
print "<body>";
?>

PHP is run first and HTML next - all outputs from PHP are sent to the HTML engine.

snelll · October 19th, 2008, 07:27 AM

Ermm could i see an example of what a php page source would look like?
Like the whole thing

Marc · October 19th, 2008, 08:01 AM

Code:


			
<?php 
include 'dbc.php';

$user_email = mysql_real_escape_string($_POST['email']);

if ($_POST['Submit']=='Login')
{
$md5pass = md5($_POST['pwd']);
$sql = "SELECT id,user_email FROM users WHERE 
            user_email = '$user_email' AND 
            user_pwd = '$md5pass' AND user_activated='1'"; 
            
$result = mysql_query($sql) or die (mysql_error()); 
$num = mysql_num_rows($result);

    if ( $num != 0 ) { 

        // A matching row was found - the user is authenticated. 
       session_start(); 
       list($user_id,$user_email) = mysql_fetch_row($result);
        // this sets variables in the session 
        $_SESSION['user']= $user_email;  
        
            
        if (isset($_GET['ret']) && !empty($_GET['ret']))
        {
        header("Location: $_GET[ret]");
        } else
        {
        header("Location: myaccount.php");
        }
        //echo "Logged in...";
        exit();
    } 

header("Location: login.php?msg=Invalid Login");
//echo "Error:";
exit();        
}

?>

<link href="styles.css" rel="stylesheet" type="text/css">

<?php if (isset($_GET['msg'])) { echo "<div class=\"msg\"> $_GET[msg] </div>"; } ?>


<p>&nbsp;</p><table width="40%" border="0" align="center" cellpadding="0" cellspacing="0">
  <tr> 
    <td bgcolor="#d5e8f9" class="mnuheader" >
<div align="center"><font size="5"><strong>Login 
        Members</strong></font></div></td>
  </tr>
  <tr> 
    <td bgcolor="#e5ecf9" class="mnubody"><form name="form1" method="post" action="">
        <p>&nbsp;</p>
        <p align="center">Your Email 
          <input name="email" type="text" id="email">
        </p>
        <p align="center"> Password: 
          <input name="pwd" type="password" id="pwd">
        </p>
        <p align="center"> 
          <input type="submit" name="Submit" value="Login">
        </p>
        <p align="center"><a href="register.php">Register</a> | <a href="forgot.php">Forgot</a></p>
      </form></td>
  </tr>
</table>

The above is an example of a Login Script.

snelll · October 19th, 2008, 08:03 AM

so there is html and php all mixed in it?
and would there be the <body> <head> and <html> tags?

joonty · October 19th, 2008, 12:02 PM

Yeh that's what I was trying to say, PHP files can contain html tags like <body>, <head>, etc. and it will be read like html. Then as soon as "<?php" is written, it is read like PHP code until the closing tag, "?>".

Jack Franklin · October 19th, 2008, 02:25 PM

You could have a normal div and text like this:

Code:

<div>
<h1>Blah blah</h1>
<p>SOme text about our company</p>
</div>

And then mix in some PHP:

Code:

<div>
<h1>Blah blah <?php echo "Hi!"; ?></h1>
<p>SOme text about our company</p>
</div>

snelll · October 19th, 2008, 02:37 PM

Yh thanks, i think i understand now