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PHP 打印二进制形式介绍

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2016-06-13 10:40:131492browse

PHP 打印二进制形式介绍

  2.         $row[permission]=u;// or =chr(117)
  3.         
  4.         echo "
    id = " . str_pad(decbin(ord($row[permission])),8,0,STR_PAD_LEFT);
  5.         echo "
    id = ";
  6.         printf("%08b
    ",ord($row[permission]));
  7. ?>
  8. 输出：
  9. id = 01110101
  10. id = 1110101

printf解释：
% ：占位符
0：用0填充未满的宽度
8 ：共要8位
b ：二进制模式
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