How to define variable value as logical value?Simple question, help please

[toplisek]

I have in one file of PHP
variable like:

 $validation='true'; 

and included in this file another. I would like that IF script will be performed
and put IF like:

 if ( $validation='true')
      {$errorinput="This <b>Username or Password</b> is not valid!<br />"; }
     else  {$errorinput=""; }
     } 

Do you know if logical operator works like this or only like function?

[LimpBagel]

if($validation == 'true') 

You've also got problems with your parens.

You should follow this format:

if(condition) {
      statement;
} else {
    statement;
} 

or:

if(condition) 
{
      statement;
} else 
{
    statement;
} 

The way you have it now, you have an extra }

[toplisek]

I would like to give variable $errorinput="" value empty in ELSE script . How is correct? Now is $errorinput="";

  if ($validation=='true')
      {$errorinput="This <b>Username or Password</b> is not valid!<br />"; }
     else  {$errorinput=""; }
     } 

[bokeh]

Toplisek, you keep making the same mistake. If you change your order it might help you to remember.
to set a variable to a value use =
$var = TRUE;
to check a variable is true use ==
TRUE == $var

Maybe changing the order will help you think about what you are doing.

[toplisek]

Sorry. I will not make mistake anymore.