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Watch out when rounding up to zero, PHP gives the answer as negative zero. $returnValue = ceil(-0.5); returns: -0

@Ismail: Take a look at the line "your call:". There you can see, what realy is executed. Calculations are not allowed as parameters of functions, sorry, but it is a security issue.

i tried these examples: ceil(5/2); and result was 5 ceil( (5/2) ); and the resutl was 0