<HTML ><HEAD ><TITLE >Core Predefined Constants</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="Predefined Constants" HREF="reserved.constants.html"><LINK REL="PREVIOUS" TITLE="Predefined Constants" HREF="reserved.constants.html"><LINK REL="NEXT" TITLE="Standard Predefined Constants" HREF="reserved.constants.standard.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="reserved.constants.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="reserved.constants.standard.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="reserved.constants.core" ></A >Core Predefined Constants</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN107209" ></A >Core Predefined Constants -- Constants defined in the PHP core, Zend, and SAPI modules</DIV ><DIV CLASS="refsect1" ><A NAME="AEN107212" ></A ><H2 >Description</H2 ><P > These constants are defined by the PHP core. This includes PHP, the Zend engine, and SAPI modules. </P ><P ></P ><DIV CLASS="variablelist" ><DL ><DT ><TT CLASS="constant" ><B >PHP_VERSION</B ></TT > (<A HREF="language.types.string.html" >string</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PHP_OS</B ></TT > (<A HREF="language.types.string.html" >string</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >DEFAULT_INCLUDE_PATH</B ></TT > (<A HREF="language.types.string.html" >string</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PEAR_INSTALL_DIR</B ></TT > (<A HREF="language.types.string.html" >string</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PEAR_EXTENSION_DIR</B ></TT > (<A HREF="language.types.string.html" >string</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PHP_EXTENSION_DIR</B ></TT > (<A HREF="language.types.string.html" >string</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PHP_BINDIR</B ></TT > (<A HREF="language.types.string.html" >string</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PHP_LIBDIR</B ></TT > (<A HREF="language.types.string.html" >string</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PHP_DATADIR</B ></TT > (<A HREF="language.types.string.html" >string</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PHP_SYSCONFDIR</B ></TT > (<A HREF="language.types.string.html" >string</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PHP_LOCALSTATEDIR</B ></TT > (<A HREF="language.types.string.html" >string</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PHP_CONFIG_FILE_PATH</B ></TT > (<A HREF="language.types.string.html" >string</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PHP_OUTPUT_HANDLER_START</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PHP_OUTPUT_HANDLER_CONT</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >PHP_OUTPUT_HANDLER_END</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >E_ERROR</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >E_WARNING</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >E_PARSE</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >E_NOTICE</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >E_CORE_ERROR</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >E_CORE_WARNING</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >E_COMPILE_ERROR</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >E_COMPILE_WARNING</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >E_USER_ERROR</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >E_USER_WARNING</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >E_USER_NOTICE</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ><DT ><TT CLASS="constant" ><B >E_ALL</B ></TT > (<A HREF="language.types.integer.html" >integer</A >)</DT ><DD ><P > </P ></DD ></DL ></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="reserved.constants.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="reserved.constants.standard.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Predefined Constants</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="reserved.constants.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Standard Predefined Constants</TD ></TR ></TABLE ></DIV ></BODY ></HTML >