note 46721 added to language.operators.comparison

be REALLY careful when comparing float values. PHP, like most languages, is vunerable to he problems of floating point precision. Do NOT compare floats directly, and this also means any decimal value at all. The headaches finding out if $var = 0.3 caused me are unbelievable. even though the stored variable WAS 0.3 it was still ignoring it - this was to do with the internal float not recognising it as 0.3 even though it *displayed* it as 0.3 when echo'd or printed... basically it was stored imprecisly, but not able to display it as such. I ended up having to compare after multiplying by 10, rounding, and then dividing by 10... rediculous, but sadly the only way I could find to reliably do it. The round seemed to remove the break in the float... jesus that took me ages to find... ---- Manual Page -- http://www.php.net/manual/en/language.operators.comparison.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+46721 Delete -- http://master.php.net/manage/user-notes.php?action=delete+46721&report=yes Reason: bad code -- http://master.php.net/manage/user-notes.php?action=delete+46721&report=yes&reason=bad+code Reason: spam -- http://master.php.net/manage/user-notes.php?action=delete+46721&report=yes&reason=spam Reason: useless example -- http://master.php.net/manage/user-notes.php?action=delete+46721&report=yes&reason=useless+example Reason: contains commercial links -- http://master.php.net/manage/user-notes.php?action=delete+46721&report=yes&reason=contains+commercial+links Reason: useless note -- http://master.php.net/manage/user-notes.php?action=delete+46721&report=yes&reason=useless+note Reject -- http://master.php.net/manage/user-notes.php?action=reject+46721&report=yes Search -- http://master.php.net/manage/user-notes.php