Example of bitwise and bitwise OR operations in PHP _ PHP Tutorial

Example of bitwise and bitwise OR operation in PHP. Bitwise and operations are mainly performed on binary numbers. The code is as follows :? Php $ a1; $ b2; $ c $ a ^ B; echo $ c3? Here, we do not simply convert the addition relationship decimal 1 into bitwise and mainly operate on binary numbers.

The code is as follows:

The code is as follows:

$ A = 1;
$ B = 2;
$ C = $ a ^ B;
Echo $ c // 3
?>

This is not a simple addition.
Convert decimal 1 to binary 00000001
Convert decimal 2 to binary 00000010
Bitwise ^ 00000011 // the values of different values are regarded as 1 ^
Then,

The code is as follows:

$ A = 1;
$ B = 2;
Echo $ a & $ c; // 1
?>

Convert decimal 3 to binary 00000011
Convert decimal 1 to binary 00000001
Bitwise & 00000001 // The value remains the same for each single digit. Otherwise, the value is 0.
Finally, we will introduce the usage; it makes no sense to return values after bitwise. It is mainly used to determine whether $ a exists in $ c. // There are many permission usage options.

The code is as follows:

$ My_privilege = 15; // 1 + 2 + 4 + 8 have all permissions
$ Pri = '';
$ Privilege_arr = array (8 => 'Add', 4 => 'Delete', 2 => 'change', 1 => 'query ');
Foreach ($ privilege_arr as $ k => $ v ){
$ K & $ my_privilege & $ Pri. = ''I have '. $ v.' power
';
}
Echo $ Pri;
?>

Bytes. The code is as follows :? Php $ a = 1; $ B = 2; $ c = $ a ^ B; echo $ c // 3? Here we do not simply convert the add-on relationship to decimal 1...