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<?xml version='1.0' encoding="utf-8"?>
<!-- $Revision: 297078 $ -->
<appendix xml:id="posix.constants" xmlns="http://docbook.org/ns/docbook">
&reftitle.constants;
&extension.constants;
<variablelist>
<varlistentry>
<term>
<constant>POSIX_F_OK</constant>
(<type>integer</type>)
</term>
<listitem>
<simpara>
Check whether the file exists.
</simpara>
</listitem>
</varlistentry>
<varlistentry>
<term>
<constant>POSIX_R_OK</constant>
(<type>integer</type>)
</term>
<listitem>
<simpara>
Check whether the file exists and has read permissions.
</simpara>
</listitem>
</varlistentry>
<varlistentry>
<term>
<constant>POSIX_W_OK</constant>
(<type>integer</type>)
</term>
<listitem>
<simpara>
Check whether the file exists and has write permissions.
</simpara>
</listitem>
</varlistentry>
<varlistentry>
<term>
<constant>POSIX_X_OK</constant>
(<type>integer</type>)
</term>
<listitem>
<simpara>
Check whether the file exists and has execute permissions.
</simpara>
</listitem>
</varlistentry>
<varlistentry>
<term>
<constant>POSIX_S_IFBLK</constant>
(<type>integer</type>)
</term>
<listitem>
<simpara>
Block special file
</simpara>
</listitem>
</varlistentry>
<varlistentry>
<term>
<constant>POSIX_S_IFCHR</constant>
(<type>integer</type>)
</term>
<listitem>
<simpara>
Character special file
</simpara>
</listitem>
</varlistentry>
<varlistentry>
<term>
<constant>POSIX_S_IFIFO</constant>
(<type>integer</type>)
</term>
<listitem>
<simpara>
FIFO (named pipe) special file
</simpara>
</listitem>
</varlistentry>
<varlistentry>
<term>
<constant>POSIX_S_IFREG</constant>
(<type>integer</type>)
</term>
<listitem>
<simpara>
Normal file
</simpara>
</listitem>
</varlistentry>
<varlistentry>
<term>
<constant>POSIX_S_IFSOCK</constant>
(<type>integer</type>)
</term>
<listitem>
<simpara>
Socket
</simpara>
</listitem>
</varlistentry>
</variablelist>
<note>
<para>
These constants are available since PHP 5.1.0. Please also note that some
of them may not be available in your system.
</para>
</note>
</appendix>
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