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PHP 打印二进制形式介绍

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Release: 2016-06-13 10:40:13
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PHP 打印二进制形式介绍

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