[RESOLVED] Easy Question I hope... PHP submit

Heatmizer20

I'm writing PHP to understand it. This isn't for a project, just trying to understand and write IF, FORMS and all that jazz.

Here is the problem though. This PHP works. BUT then again it doesn't...

if you type something in and then hit the submit button, it goes to a blank screen (suppose to refresh the page its on and post a message). If you hit back on the browser (the form is still filled out) and hit submit again, IT THEN show you the result. I can't see what is making that happen. maybe someone could help me out.

<?php
if ($submit){
   if (!empty($_POST['workplace'])){
       if ($_POST['workplace'] == ("the store shop")){
	        echo "you do belong"; 
       }else { 
		    echo "you do not belong here, please leave";
	   }
   } else {
	       echo "Please Fill Out Form";

}
}
?>
<form method="post" action="<?php echo $PHP_SELF?>">
<br>Put in your place of work<br><input type="text" name="workplace" size="24"><input type="submit" name="submit" value="click me" border="0">
</form>

thanks for you help.
-JB-

RyanJones

Hi there!

Try this and see if this works:

<?php
  // Is the post variable set? If it is then the form must have been posted.
  if (isset($_POST['workplace']) == true){
    // Do we have a value for the posted variable?
    if (($_POST['workplace'] != '') && ($_POST['workplace'] == "the store shop")){
      // Yes we do and its the value we want :D
      echo 'you do belong';
    }
    else{
      // Go away - wrong value entered.
       echo 'you do not belong here, please leave';
    }
  }
?>
<form method="post" action="<?php echo($_SERVER['PHP_SELF'])?>">
<br />Put in your place of work<br />
<input type="text" name="workplace" size="24" />
<input type="submit" name="submit" value="click me" border="0" />
</form>

Rememeber when working with forms always remember to validate all inputs but in this case it does not look like it matters much :-)

Edit: Simplified things a bit...

Cheers,

Ryan Jones

devinemke

<?php
if (isset($_POST['submit']))
{
	if ($_POST['workplace'])
	{
		if ($_POST['workplace'] == 'the store shop') {echo 'you do belong';}
		else {echo 'you do not belong here, please leave';}
	}
	else
	{
		echo 'Please Fill Out Form';
	}
}
?>

<form action="" method="POST">
Put in your place of work:<br>
<input type="text" name="workplace" size="24"><br>
<input type="submit" name="submit" value="click me">
</form>

Heatmizer20

Thank you both.

This is Interesting looking at both of your responces.

It seems that the empty field

if (!empty($_POST['workplace'])){

Should have been written differently.
I can see how you both approached it and I will try again.

It also looks like both of you took different approaches to the submit button as well.
Is ---> <?php echo $PHP_SELF ?> ...... IF ($submit) <-- something that i should avoid using?

Should it be more of a
if (isset($_POST['submit'])) command..???

laserlight

Is ---> <?php echo $PHP_SELF ?> ...... IF ($submit) <-- something that i should avoid using?

Should it be more of a
if (isset($_POST['submit'])) command..???

Yes. Read this forum's FAQ on register_globals

RyanJones

Heatmizer20 wrote:
It also looks like both of you took different approaches to the submit button as well.
Is ---> <?php echo $PHP_SELF ?> ...... IF ($submit) <-- something that i should avoid using?

Should it be more of a
if (isset($_POST['submit'])) command..???

As laserlight said register_globals on cna be a bad idea, especially in a secure system.

Most of the differences in the codes are user preference, I always check is one of the posted variables are set and some people simply check if the sumit button has been set and still other use a specail mode set in the URL, like so:

<?php
  // Is the post variable set? If it is then the form must have been posted.
  if ((isset($_GET['Mode']) == true) && (strtolower($_GET['Mode']) == 'submit')){
    // Do we have a value for the posted variable?
    if (($_POST['workplace'] != '') && ($_POST['workplace'] == "the store shop")){
      // Yes we do and its the value we want :D
      echo 'you do belong';
    }
    else{
      // Go away - wrong value entered.
       echo 'you do not belong here, please leave';
    }
  }
?>
<form method="post" action="<?php echo($_SERVER['PHP_SELF'])?>?Mode=Submit">
<br />Put in your place of work<br />
<input type="text" name="workplace" size="24" />
<input type="submit" name="submit" value="click me" border="0" />
</form>

I use the above method when dealing with multiple levels of editing something like the database in a user management system, first being edit, second edit2 and finally edit3 - it all depends on what seesm easiest too you and what you are doing 😃

Cheers,

Ryan Jones

Heatmizer20

Thank so much guys. I will continue my practicing and testing.

I will also read about register_globles.

Have a great holiday everyone.
-JB-