note 92357 added to function.bccomp

I made this to compare an unlimited size of numbers.. This could be useful for those without the BCMath extension. It allows decimals, and option $Scale parameter. If $Scale isn't specified, then it'll automatically adjust to the correct number of decimals to compare. <?php function Comp($Num1,$Num2,$Scale=null) { // check if they're valid positive numbers, extract the whole numbers and decimals if(!preg_match("/^\+?(\d+)(\.\d+)?$/",$Num1,$Tmp1)|| !preg_match("/^\+?(\d+)(\.\d+)?$/",$Num2,$Tmp2)) return('0'); // remove leading zeroes from whole numbers $Num1=ltrim($Tmp1[1],'0'); $Num2=ltrim($Tmp2[1],'0'); // first, we can just check the lengths of the numbers, this can help save processing time // if $Num1 is longer than $Num2, return 1.. vice versa with the next step. if(strlen($Num1)>strlen($Num2)) return(1); else { if(strlen($Num1)<strlen($Num2)) return(-1); // if the two numbers are of equal length, we check digit-by-digit else { // remove ending zeroes from decimals and remove point $Dec1=isset($Tmp1[2])?rtrim(substr($Tmp1[2],1),'0'):''; $Dec2=isset($Tmp2[2])?rtrim(substr($Tmp2[2],1),'0'):''; // if the user defined $Scale, then make sure we use that only if($Scale!=null) { $Dec1=substr($Dec1,0,$Scale); $Dec2=substr($Dec2,0,$Scale); } // calculate the longest length of decimals $DLen=max(strlen($Dec1),strlen($Dec2)); // append the padded decimals onto the end of the whole numbers $Num1.=str_pad($Dec1,$DLen,'0'); $Num2.=str_pad($Dec2,$DLen,'0'); // check digit-by-digit, if they have a difference, return 1 or -1 (greater/lower than) for($i=0;$i<strlen($Num1);$i++) { if((int)$Num1{$i}>(int)$Num2{$i}) return(1); else if((int)$Num1{$i}<(int)$Num2{$i}) return(-1); } // if the two numbers have no difference (they're the same).. return 0 return(0); } } } $A="10.50002"; $B="10.50001"; printf(" Comp(%s,%s); // %s\r\n",$A,$B, Comp($A,$B)); printf("BCComp(%s,%s); // %s\r\n",$A,$B,BCComp($A,$B)); /* Comp(10.50002,10.50001); // 1 BCComp(10.50002,10.50001); // 0 (BCComp has a default decimal scale of 0, unless specified) */ ?> I tried to make this behave like BCComp.. The only difference being mine will compare the decimals by default.. BCComp won't.. .. unless, of course, you specify the amount of decimals to include in the process. Enjoy, Nitrogen. ---- Server IP: 87.124.35.190 Probable Submitter: 217.42.173.142 ---- Manual Page -- http://www.php.net/manual/en/function.bccomp.php Edit -- https://master.php.net/note/edit/92357 Del: integrated -- https://master.php.net/note/delete/92357/integrated Del: useless -- https://master.php.net/note/delete/92357/useless Del: bad code -- https://master.php.net/note/delete/92357/bad+code Del: spam -- https://master.php.net/note/delete/92357/spam Del: non-english -- https://master.php.net/note/delete/92357/non-english Del: in docs -- https://master.php.net/note/delete/92357/in+docs Del: other reasons-- https://master.php.net/note/delete/92357 Reject -- https://master.php.net/note/reject/92357 Search -- https://master.php.net/manage/user-notes.php