<HTML ><HEAD ><TITLE >split</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="Regular Expression Functions (POSIX Extended)" HREF="ref.regex.html"><LINK REL="PREVIOUS" TITLE="eregi" HREF="function.eregi.html"><LINK REL="NEXT" TITLE="spliti" HREF="function.spliti.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.eregi.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.spliti.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.split" ></A >split</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN82123" ></A ><P > (PHP 3, PHP 4 )</P >split -- split string into array by regular expression</DIV ><DIV CLASS="refsect1" ><A NAME="AEN82126" ></A ><H2 >Description</H2 >array <B CLASS="methodname" >split</B > ( string pattern, string string [, int limit])<BR ></BR ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Note: </B > <A HREF="function.preg-split.html" ><B CLASS="function" >preg_split()</B ></A >, which uses a Perl-compatible regular expression syntax, is often a faster alternative to <B CLASS="function" >split()</B >. </P ></BLOCKQUOTE ></DIV ><P > Returns an array of strings, each of which is a substring of <TT CLASS="parameter" ><I >string</I ></TT > formed by splitting it on boundaries formed by the regular expression <TT CLASS="parameter" ><I >pattern</I ></TT >. If <TT CLASS="parameter" ><I >limit</I ></TT > is set, the returned array will contain a maximum of <TT CLASS="parameter" ><I >limit</I ></TT > elements with the last element containing the whole rest of <TT CLASS="parameter" ><I >string</I ></TT >. If an error occurs, <B CLASS="function" >split()</B > returns <TT CLASS="constant" ><B >FALSE</B ></TT >. </P ><P > To split off the first four fields from a line from <TT CLASS="filename" >/etc/passwd</TT >: <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN82154" ></A ><P ><B >Example 1. <B CLASS="function" >split()</B > Example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="php" >list($user,$pass,$uid,$gid,$extra)= split (":", $passwd_line, 5);</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Note: </B > If there are <TT CLASS="replaceable" ><I >n</I ></TT > occurrences of <TT CLASS="parameter" ><I >pattern</I ></TT >, the returned array will contain <TT CLASS="literal" ><TT CLASS="replaceable" ><I >n</I ></TT >+1</TT > items. For example, if there is no occurrence of <TT CLASS="parameter" ><I >pattern</I ></TT >, an array with only one element will be returned. Of course, this is also true if <TT CLASS="parameter" ><I >string</I ></TT > is empty. </P ></BLOCKQUOTE ></DIV ><P > To parse a date which may be delimited with slashes, dots, or hyphens: <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN82167" ></A ><P ><B >Example 2. <B CLASS="function" >split()</B > Example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="php" >$date = "04/30/1973"; // Delimiters may be slash, dot, or hyphen list ($month, $day, $year) = split ('[/.-]', $date); echo "Month: $month; Day: $day; Year: $year<br>\n";</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > Note that <TT CLASS="parameter" ><I >pattern</I ></TT > is case-sensitive. </P ><P > Note that if you don't require the power of regular expressions, it is faster to use <A HREF="function.explode.html" ><B CLASS="function" >explode()</B ></A >, which doesn't incur the overhead of the regular expression engine. </P ><P > For users looking for a way to emulate Perl's <B CLASS="command" >@chars = split('', $str)</B > behaviour, please see the examples for <A HREF="function.preg-split.html" ><B CLASS="function" >preg_split()</B ></A >. </P ><P > Please note that <TT CLASS="parameter" ><I >pattern</I ></TT > is a regular expression. If you want to split on any of the characters which are considered special by regular expressions, you'll need to escape them first. If you think <B CLASS="function" >split()</B > (or any other regex function, for that matter) is doing something weird, please read the file <TT CLASS="filename" >regex.7</TT >, included in the <TT CLASS="filename" >regex/</TT > subdirectory of the PHP distribution. It's in manpage format, so you'll want to do something along the lines of <B CLASS="command" >man /usr/local/src/regex/regex.7</B > in order to read it. </P ><P > See also: <A HREF="function.preg-split.html" ><B CLASS="function" >preg_split()</B ></A >, <A HREF="function.spliti.html" ><B CLASS="function" >spliti()</B ></A >, <A HREF="function.explode.html" ><B CLASS="function" >explode()</B ></A >, <A HREF="function.implode.html" ><B CLASS="function" >implode()</B ></A >, <A HREF="function.chunk-split.html" ><B CLASS="function" >chunk_split()</B ></A >, and <A HREF="function.wordwrap.html" ><B CLASS="function" >wordwrap()</B ></A >. </P ></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.eregi.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.spliti.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >eregi</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.regex.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >spliti</TD ></TR ></TABLE ></DIV ></BODY ></HTML >