<HTML ><HEAD ><TITLE >posix_mkfifo</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="PHP Manual" HREF="index.html"><LINK REL="UP" TITLE="POSIX functions" HREF="ref.posix.html"><LINK REL="PREVIOUS" TITLE="posix_kill" HREF="function.posix-kill.html"><LINK REL="NEXT" TITLE="posix_setegid" HREF="function.posix-setegid.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-1"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.posix-kill.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.posix-setegid.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.posix-mkfifo" ></A >posix_mkfifo</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN75772" ></A ><P > (PHP 3>= 3.0.13, PHP 4 )</P >posix_mkfifo -- Create a fifo special file (a named pipe) </DIV ><DIV CLASS="refsect1" ><A NAME="AEN75775" ></A ><H2 >Description</H2 >bool <B CLASS="methodname" >posix_mkfifo</B > ( string pathname, int mode)<BR ></BR ><P > <B CLASS="function" >posix_mkfifo()</B > creates a special <TT CLASS="literal" >FIFO</TT > file which exists in the file system and acts as a bidirectional communication endpoint for processes. </P ><P > The second parameter <TT CLASS="parameter" ><I >mode</I ></TT > has to be given in octal notation (e.g. 0644). The permission of the newly created <TT CLASS="literal" >FIFO</TT > also depends on the setting of the current <A HREF="function.umask.html" ><B CLASS="function" >umask()</B ></A >. The permissions of the created file are (mode & ~umask). </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Note: </B >When <A HREF="features.safe-mode.html" >safe mode</A > is enabled, PHP checks whether the directory in which you are about to operate has the same UID (owner) as the script that is being executed.</P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.posix-kill.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.posix-setegid.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >posix_kill</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.posix.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >posix_setegid</TD ></TR ></TABLE ></DIV ></BODY ></HTML >