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|= Operator

I'm a total newbie in PHP. While studying code a friend showed me I
was puzzled by this operator " |= " (quotes not included). I know it
is somesort of operator but I could not find a description of it in
the php documentation. What does it do and what is it for ? Many
thanks.....
Jul 17 '05 #1
2 1716

On 24-Dec-2003, os**********@hotpop.com (osirishinzen) wrote:
I'm a total newbie in PHP. While studying code a friend showed me I
was puzzled by this operator " |= " (quotes not included). I know it
is somesort of operator but I could not find a description of it in
the php documentation. What does it do and what is it for ? Many
thanks.....


It's the combination of logical or and assignment
$a |= $b;
is equivalent to
$a = $a | $b;

+=, -=, .=, etc all work the same way

--
Tom Thackrey
www.creative-light.com
tom (at) creative (dash) light (dot) com
do NOT send email to ja*********@willglen.net (it's reserved for spammers)
Jul 17 '05 #2
os**********@hotpop.com (osirishinzen) schrieb:
I'm a total newbie in PHP. While studying code a friend showed me I
was puzzled by this operator " |= " (quotes not included). I know it
is somesort of operator but I could not find a description of it in
the php documentation.
Looks like a merger of the bitwise comparison operator
(http://www.php.net/manual/en/languag...rs.bitwise.php) and an
assignment.
What does it do and what is it for ?


$i = 5;
$i |= 9;
echo($i);

"|" works bitwise. 5 has set the bits for 1 and 4, 9 has set the bits
for 1 and 8. This data is "or"ed and we get a result of 13.

Regards,
Matthias
Jul 17 '05 #3

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