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>shm_attach</H1
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><P
> (PHP 3 >= 3.0.6, PHP 4, PHP 5)</P
>shm_attach -- Creates or open a shared memory segment</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN205885"
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><H2
>Description</H2
>int <B
CLASS="methodname"
>shm_attach</B
> ( int key [, int memsize [, int perm]] )<BR
></BR
><P
> <B
CLASS="function"
>shm_attach()</B
> returns an id that can be
used to access the System V shared memory with the given <CODE
CLASS="parameter"
>key</CODE
>, the
first call creates the shared memory segment with <CODE
CLASS="parameter"
>memsize</CODE
>
(default: sysvshm.init_mem in the <TT
CLASS="filename"
>php.ini</TT
>, otherwise
10000 bytes) and the optional perm-bits <CODE
CLASS="parameter"
>perm</CODE
>
(default: 0666).
</P
><P
> A second call to <B
CLASS="function"
>shm_attach()</B
> for the same
<CODE
CLASS="parameter"
>key</CODE
> will return a different shared memory
identifier, but both identifiers access the same underlying
shared memory. <CODE
CLASS="parameter"
>Memsize</CODE
> and
<CODE
CLASS="parameter"
>perm</CODE
> will be ignored.
</P
><P
> See also <A
HREF="function.ftok.html"
><B
CLASS="function"
>ftok()</B
></A
>, and <A
HREF="function.shm-detach.html"
><B
CLASS="function"
>shm_detach()</B
></A
>.
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