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> Bitwise operators allow you to turn specific bits within an
integer on or off. If both the left- and right-hand parameters are
strings, the bitwise operator will operate on the characters' ASCII
values.
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<font color="#0000BB"><?php<br /></font><font color="#007700">echo </font><font color="#0000BB">12 </font><font color="#007700">^ </font><font color="#0000BB">9</font><font color="#007700">; </font><font color="#FF8000">// Outputs '5'<br /><br /></font><font color="#007700">echo </font><font color="#DD0000">"12" </font><font color="#007700">^ </font><font color="#DD0000">"9"</font><font color="#007700">; </font><font color="#FF8000">// Outputs the Backspace character (ascii 8)<br /> // ('1' (ascii 49)) ^ ('9' (ascii 57)) = #8<br /><br /></font><font color="#007700">echo </font><font color="#DD0000">"hallo" </font><font color="#007700">^ </font><font color="#DD0000">"hello"</font><font color="#007700">; </font><font color="#FF8000">// Outputs the ascii values #0 #4 #0 #0 #0<br /> // 'a' ^ 'e' = #4<br /></font><font color="#0000BB">?></font>
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>Tabel 10-3. Bitwise Operators</B
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>$a & $b</TD
><TD
>And</TD
><TD
>Bits that are set in both $a and $b are set.</TD
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><TD
>$a | $b</TD
><TD
>Or</TD
><TD
>Bits that are set in either $a or $b are set.</TD
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>$a ^ $b</TD
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>Xor</TD
><TD
> Bits that are set in $a or $b but not both are set.
</TD
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>~ $a</TD
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>Not</TD
><TD
> Bits that are set in $a are not set, and vice versa.
</TD
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><TD
>$a << $b</TD
><TD
>Shift left</TD
><TD
> Shift the bits of $a $b steps to the left (each step means
"multiply by two")
</TD
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><TR
><TD
>$a >> $b</TD
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>Shift right</TD
><TD
> Shift the bits of $a $b steps to the right (each step means
"divide by two")
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