Bitwise AND and/or operations in PHP

Welcome to the Linux community forum and interact with 2 million technical staff to access the bitwise AND binary operations. The Code is as follows: [php]? Php $ a1; $ b2; $ c $ a ^ B; echo $ c3? Here we do not simply convert the addition relationship decimal 1 to binary 00000001 decimal 2 to binary 00000010 by bit ^ 000

Welcome to the Linux community forum, and interact with 2 million technical staff> enter the bitwise AND mainly operate on the binary number. The Code is as follows: [php]? Php $ a = 1; $ B = 2; $ c = $ a ^ B; echo $ c // 3? Here we do not simply convert the addition relationship decimal 1 to binary 00000001 decimal 2 to binary 00000010 by bit ^ 000

Welcome to the Linux community forum and interact with 2 million technicians>

Bitwise AND operations are mainly performed on binary numbers.

The Code is as follows:

[Php]

　　

$ 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,

[Html]

　　

$ 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.

[Html]

　　

$ 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;

?>