[Resolved] Why is this Comparison Operator not working right?

basil

Ok, I admit I'm still new to PHP but I thought I understood comparison operators. The book I bought "PhP and MySQL Web Development" says the < means "less than" and the <= means less than or equal to. But I have a bit of code that used the < but it seems to be acting like <= In other words, of the two variables are equal, it still evaluates as if one is thess than the other. Here's my code in question.

if($myspeed<$minspeed)
{
$myspeed=$minspeed;
			echo "<IMG src=\"vrally/granny.jpg\"><FONT SIZE=\"3\" COLOR=\"GREEN\" FACE=\"Verdana\">Sorry Granny, your speed was below minimum allowed for this route <br>";
			echo "We are setting your speed to the minimum of ".$myspeed." MPH for this route"."</font>"."<p>";
}

When $myspeed and $minspeed are both equal, it still evaluates the code inside the if statement and I am pulling my hair out trying to figure out why. Any ideas?

Thanks,
Basil

tasistro

Ok, are the speed variables integers or floating point. If floating point you could have a precision issue in your hands.

basil

That might explain it. One number is input from a form by a user ($myspeed) and the other is stored in flat file ($minspeed). Wouldn't they both just be integers?

Basil

seby

so if $myspeed is coming from a form then use:

$_POST[myspeed] instead of $myspeed

basil

seby, I tried that and no change. It still works the same way. Acts as if "$myspeed" is less than "$minspeed" even though they are both...wait a minute, I just had a thought! Since "Minspeed" is coming from a flat file, could there also be a /n in there that is messing it up? Wait, I'll be right back,,,,

seby

yep, line breaks could be the cause.

basil

BINGO! I did a trim() on the number that comes from the flat file, like this:

$minspeed=trim($minspeed);

and it works great now! Man, little things can sure screw you up!

Thanks for the help,
Basil