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4.6 Mathematics

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PHP has a great number of mathematical functions ready for you to use, as well as several constants for popular numbers so you do not have to calculate them yourself.

Nearly all of the functions can be grouped into three areas: rounding, randomisation, and conversion. Naturally some of these functions are only useful to people with a specific interest in mathematics, but, happily, the majority of these functions come into the conversion group.

<< 4.5.4 Converting from components: mktime()		4.6.1 Rounding: ceil(), floor(), and round() >>
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pff - 29 Aug 2008

This chapter was so confusing...
plz plz, could someone explain it to me?

those comments are sometimes so stupid - they should be moderated.
but it doesnt look like author even bother to read them.

btw, now we all know u can use time and date so maybe you
could add a timestamp to comments instead of this annoying
actual date on the top of them? :P

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