|= Operator

[osirishinzen]

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.....

[Tom Thackrey]

Re: |= Operator


On 24-Dec-2003, osirishinzen@ho tpop.com (osirishinzen) wrote:
[color=blue]
> 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.....[/color]

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

https://www.creative-light.com

tom (at) creative (dash) light (dot) com
do NOT send email to jamesbutler@wil lglen.net (it's reserved for spammers)

[Matthias Esken]

Re: |= Operator

osirishinzen@ho tpop.com (osirishinzen) schrieb:
[color=blue]
> 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.[/color]

Looks like a merger of the bitwise comparison operator
(http://www.php.net/manual/en/languag...rs.bitwise.php) and an
assignment.
[color=blue]
> What does it do and what is it for ?[/color]

$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