$submit == true && -- losing my mind -- any ideas as a workaround?

[programguru]

if ($submit == 'true' && $name == '' || $email == '' || $msg == '') {
	$nomsgerr = "<span class=\"msg\">Please enter your information<br />in all fields marked with *.</span>";
}

 

The issue I am having is my Submit button seems to display my err message by default when my page loads. I figured

$submit == 'true' 

would create the err ONLY of the submit button was pressed, but it does not seem to be working!

 

All my other code (not posted) with submit is working fine, but I dont want

$nomsgerr 

to display if the submit button is not pressed.

 

Does anyone know a workaround?

[iceman400]

this is gonna sound silly, but i've had problems like that in the past and when i added extra () around the OR statements, problem was solved. but that might just be my system.

[Greaser9780]

Such as:

if ($submit == 'true' && ($name == '' || $email == '' || $msg == '')) {
	$nomsgerr = "<span class=\"msg\">Please enter your information<br />in all fields marked with *.</span>";
}

[programguru]

Greaser,

 

Im not sure why, but I had to remove the

== 'true'

to make it work. Thanks for the tip its working now!

 

if ($submit && ($name == '' || $email == '' || $msg == '')) {
	$nomsgerr = "<span class=\"msg\">Please enter your information<br />in all fields marked with *.</span>";
}

[Greaser9780]

probably because submit had to be executed if it called this script.

[mjlogan]

A. !( 1 || 0 )        ANSWER: 0

B. !( 1 || 1 && 0 )    ANSWER: 0 (AND is evaluated before OR)

C. !( ( 1 || 0 ) && 0 )  ANSWER: 1 (Parenthesis are useful)

 

remember those BRACKETS 

[paul2463]

in PHP everything that exists is "true" unless it is declared as "false" or "NULL"

 

so if

$submit="Hello"; //means $submit is not an empty string and exists in a true state
// so

if($submit) // evaluates to true because it exists and is not false or NULL

$submit = false; //means $submit exists in a false state
// so

if($submit) //evaluates to false

$submit = NULL; //means $submit doesnt exist
// so

if($submit) //evaluates to false

 

thats the way I look at it anyway

 

[programguru]

Well,

 

This has been very educational. Now I need to find a new problem to solve!

 

 

[programguru]

Paul,

 

Maybe I am just way too tired but you said:

 

in PHP everything that exists is "true" unless it is declared as "false" or "NULL"

 

Then

 

if($submit) //evaluates to false

 

It appears this would evaluate to true?

 

What you say? Am I in la la land?

[paul2463]

because just above that line I had the line i changed thevalue of $submit

 

here is the same information but with the variable names changed as well to make it easier to read

 

$var1="Hello"; //means $var1 is not an empty string and exists in a true state
// so

if($var1) // evaluates to true because it exists and is not false or NULL

$var2 = false; //means $var2 exists in a false state
// so

if($var2) //evaluates to false

$var3 = NULL; //means $var3 doesnt exist
// so

if($var3) //evaluates to false