note 91888 deleted from function.bcadd by danbrown

Note Submitter: Nitrogen ---- I made this to add an unlimited size of integers together (meaning no decimals).. This could be useful for those without the BCMath extension. <?php function Add($Num1='0',$Num2='0') { // check if they're both plain numbers if(!preg_match("/^\d+$/",$Num1)||!preg_match("/^\d+$/",$Num2)) return(0); // remove zeroes from beginning of numbers for($i=0;$i<strlen($Num1);$i++) if(@$Num1{$i}!='0') {$Num1=substr($Num1,$i);break;} for($i=0;$i<strlen($Num2);$i++) if(@$Num2{$i}!='0') {$Num2=substr($Num2,$i);break;} // reverse both numbers and get their lengths $Num1=strrev($Num1);$Len1=strlen($Num1); $Num2=strrev($Num2);$Len2=strlen($Num2); // calculate which is the longest in length $MLen=max($Len1,$Len2); // $Rema is for storing the calculated numbers (helps to carry the remainder) $Rema=array(); // pad the numbers so they equal the same length (both equal to $MLen) for($i=$Len1;$i<$MLen;$i++) $Num1.='0'; for($i=$Len2;$i<$MLen;$i++) $Num2.='0'; // cycle through each digit adding them together and add them to $Rema accordingly for($i=0;$i<$MLen;$i++) $Rema[$i]=(string)((int)$Num1{$i})+((int)$Num2{$i}); // cycle through $Rema and if the item contains 2 digits, then carry the first // digit to the next item in $Rema for($i=0;$i<count($Rema);$i++) { $Rema2=str_split($Rema[$i]); if(count($Rema2)>=2) { $Rema[$i]=$Rema2[1]; @$Rema[$i+1]+=$Rema2[0]; } } // implode $Rema so it's a string and reverse it, this is the result! return(strrev(implode($Rema))); } $A='5650175242508133742'; $B='2361030539975818701734615584174625'; printf(" Add(%s,%s); // %s\r\n",$A,$B, Add($A,$B)); printf("BCAdd(%s,%s); // %s\r\n",$A,$B,BCAdd($A,$B)); // build-in function /* This will print something similar to this.. Add(5650175242508133742,2361030539975818701734615584174625); BCAdd(5650175242508133742,2361030539975818701734615584174625); both of which should be followed by the answer: 2361030539975824351909858092308367 */ ?> It was a fun experience making, and thought I'd share it. Enjoy, Nitrogen.