php integer and float comparison mismatch

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Notice the big red warning in the PHP Manual!

Never expect anything when comparing floats. The result of round, even if the precision is 0, is still a float. In your particular case it happened that the result was a little bigger than expected, so casting to int resulted in equality, but for other numbers it might as well happen for it to be a little smaller than expected and casting to int won’t round it, but truncate it, so you can’t use casting as a workaround. (As a note, a better solution than yours would be casting to string :), but still a lousy option.)

If you need to work with amounts of money always use the BC Math extension.

For rounding with BC Math you can use this technique:

$x = '211.9452';
$x = bcadd($x, '0.005', 2);

Good luck,
Alin

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