十进制转二进制

php实现十进制转换二进制

1. function dec2bin ($dec) {
2. $flag = array();
3. while ($dec != 0) {
4. array_push($flag,$dec%2);
5. $dec = (int)$dec/2;
6. }
7. $binstr = '';
8. while (!empty($flag)) {
9. $binstr .= array_pop($flag);
10. }
11. return $binstr;
12. }

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