is_float()

[Anon]

I am trying to test if a number is a float. i have tried two methods. 1) is_float() and 2) a regex to look for a decimal. niether have worked. Must say i feelpretty stupid. when it tells me that 300 is a double when i do gettype on it. how can 300 be a double and how can i find out what i actually want to know if there is a decimal in the number or not?

thanks in advance

[Anon]

Hi!

Well, technically every integer may be a float. It just depends on the context - PHP is free to cast a variable from integer to a float depending on context.
Try this to make sure is_float works okay:

print (is_float((int)10) ? "10 is a float" : "10 is not a float");

Or you can use this function:
function isfloat($st)
{
if(ereg ('^{[0-9]+[.,][0-9]+$',$st))}
{ return(true);}
return (false);
}
print "<br><br>\n";
print (isfloat((string)10.2) ? "10.2 is a float" : "10.2 is not a float");

As you see, these work as intended,

Best regards,
Stas