$a & $b | And | Bits that are set in both $a and $b are set. |
$a | $b | Or (inclusive or) | Bits that are set in either $a or $b are set. |
$a ^ $b | Xor (exclusive or) | Bits that are set in $a or $b but not both are set. |
~ $a | Not | Bits that are set in $a are not set, and vice versa. |
$a << $b | Shift left | Shift the bits of $a $b steps to the left (each step means "multiply by two") |
$a >> $b | Shift right | Shift the bits of $a $b steps to the right (each step means "divide by two") |
in php quali sono le funzioni per testare o modificare un singolo bit in
un int64 ? per intendersi l'equivalente di BT BTR BTS in assembler (con
secondo operatore un registro) ?
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Leonardo Boselli
Firenze, Toscana, Europa
http://i.trail.it