php "if" unable to determine?

<?php
$x=27;
$rs=0.2;

for ($i=1;$i<=15;$i++)
{
$x-=$rs;

echo "$x<br>";

if($x===25.2)
{
echo "ok";
}

}
?>

PHP:

if($x===25.2)
{
echo "ok";
}

unable to determine 25.2
what's error with it?

 

Try

if((string)$x == "25.2")
{
echo "ok";
}

PHP:

 

You are using the === operator, so you have to be SURE you are passing in a float as $x.

 

just change triple = to double ( compare value ==) and it would be alright.

 

I am confused,for i am learning the basic php, just start with the phpinfo(); glad to see you discuss the php, i am gald to learn it here!

 

It's work by your solution.
thanks so much.

 

It's Possible buddy:
I downloaded a code snippet from the internet, a long time ago. The code contained === in a if() decision, I checked the code thorowly, because it was giving error on execution. I found that the coder (who posted the code on some site), added an extra =, may be it was a typo, or he was not intended to reveal his fully-working code.

 

You use === and == for different reasons.

$t === "1" would mean that the variable $t was stored as "1" -- an exact match
$t == "1" would mean that whatever is stored in $t is equivalent to 1.
$t = 2-1; will return a true with ==, but a false with ===.

 

Better explanation:
php.net/manual/en/language.operators.comparison.php