note 13343 added to ref.math.php

<P>I found that when dealing with tables, a 'least common multiple' function is sometimes useful for abusing tablespan and the likes.</P> <P>So here goes (you may choose to remove the first part of the gcd function if the function call is well-behaved):</P> function gcd(n, m) //greatest common divisor { n=abs(n); m=abs(m); if (n==0 and m==0) return 1; //avoid infinite recursion if (n==m and n>=1) return n; return m<n?gcd(n-m,n):gcd(n,m-n); } function lcm(n, m) //least common multiple { return m*(n/gcd(n,m)); } <P>This may or may not be something to consider adding to the mathematical function library.</P> http://www.php.net/manual/en/ref.math.php