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Digg  bcmod
Get modulus of an arbitrary precision number
(PHP 4, PHP 5)
Code Examples / Notes » bcmodsebas
function bc_is_even($int_str) { return (int)!($int_str & 1); } More resource efficient version of 'bc_is_even'. cristiandotzuddas nospam gmaildotcom
BC Math is really cool, but has only 10 functions. So we MUST write other BC functions and share the code. Here is a simple even/odd number check. <? function bc_is_even($int_str) { if (strlen($int_str)>0) { if (bcmod($int_str, 2)==='0') return true; else return false; } else // error return 0; } ?> jmullan
<?php function bc_is_even($int_str) { if (0 < strlen($int_str)) { return !((substr($int_str, -1)) % 2); } else { // error return 0; } } ?> lauris
<?php /** * my_bcmod - get modulus (substitute for bcmod) * string my_bcmod ( string left_operand, int modulus ) * left_operand can be really big, but be carefull with modulus :( * by Andrius Baranauskas and Laurynas Butkus :) Vilnius, Lithuania **/ function my_bcmod( $x, $y ) { // how many numbers to take at once? carefull not to exceed (int) $take = 5; $mod = ''; do { $a = (int)$mod.substr( $x, 0, $take ); $x = substr( $x, $take ); $mod = $a % $y; } while ( strlen($x) ); return (int)$mod; } // example echo my_bcmod( "7044060001970316212900", 150 ); ?> |
