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>Bitwise Operators</H1
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>&#13;    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 in this
    string.
   </P
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>&#13;    <DIV
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>&#60;?php
    echo 12 ^ 9; // Outputs '5'

    echo "12" ^ "9"; // Outputs the Backspace character (ascii 8)
                     // ('1' (ascii 49)) ^ ('9' (ascii 57)) = #8

    echo "hallo" ^ "hello"; // Outputs the ascii values #0 #4 #0 #0 #0
                            // 'a' ^ 'e' = #4
?&#62;</PRE
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>Table 11-3. Bitwise Operators</B
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>Example</TH
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>Name</TH
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VALIGN="MIDDLE"
>Result</TH
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>$a &#38; $b</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>And</TD
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VALIGN="MIDDLE"
>Bits that are set in both $a and $b are set.</TD
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VALIGN="MIDDLE"
>$a | $b</TD
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VALIGN="MIDDLE"
>Or</TD
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VALIGN="MIDDLE"
>Bits that are set in either $a or $b are set.</TD
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VALIGN="MIDDLE"
>$a ^ $b</TD
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VALIGN="MIDDLE"
>Xor</TD
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>&#13;	Bits that are set in $a or $b but not both are set.
       </TD
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VALIGN="MIDDLE"
>~ $a</TD
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VALIGN="MIDDLE"
>Not</TD
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>&#13;	Bits that are set in $a are not set, and vice versa.
       </TD
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><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>$a &#60;&#60; $b</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>Shift left</TD
><TD
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>&#13;	Shift the bits of $a $b steps to the left (each step means
	"multiply by two")
       </TD
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ALIGN="LEFT"
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>$a &#62;&#62; $b</TD
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VALIGN="MIDDLE"
>Shift right</TD
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>&#13;	Shift the bits of $a $b steps to the right (each step means
	"divide by two")
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