<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >str_split</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="String 字符串处理函数" HREF="ref.strings.html"><LINK REL="PREVIOUS" TITLE="str_shuffle" HREF="function.str-shuffle.html"><LINK REL="NEXT" TITLE="str_word_count" HREF="function.str-word-count.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></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 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.str-shuffle.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.str-word-count.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.str-split" ></A >str_split</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN227265" ></A ><P > (PHP 5)</P >str_split -- Convert a string to an array </DIV ><DIV CLASS="refsect1" ><A NAME="AEN227268" ></A ><H2 >Description</H2 >array <B CLASS="methodname" >str_split</B > ( string string [, int split_length] )<BR ></BR ><P > Converts a string to an array. If the optional <CODE CLASS="parameter" >split_length</CODE > parameter is specified, the returned array will be broken down into chunks with each being <CODE CLASS="parameter" >split_length</CODE > in length, otherwise each chunk will be one character in length. </P ><P > <TT CLASS="constant" ><B >FALSE</B ></TT > is returned if <CODE CLASS="parameter" >split_length</CODE > is less than 1. If the <CODE CLASS="parameter" >split_length</CODE > length exceeds the length of <CODE CLASS="parameter" >string</CODE >, the entire string is returned as the first (and only) array element. </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN227288" ></A ><P ><B >例 1. Example uses of <B CLASS="function" >str_split()</B ></B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /><br />$str </font><font color="#007700">= </font><font color="#DD0000">"Hello Friend"</font><font color="#007700">;<br /><br /></font><font color="#0000BB">$arr1 </font><font color="#007700">= </font><font color="#0000BB">str_split</font><font color="#007700">(</font><font color="#0000BB">$str</font><font color="#007700">);<br /></font><font color="#0000BB">$arr2 </font><font color="#007700">= </font><font color="#0000BB">str_split</font><font color="#007700">(</font><font color="#0000BB">$str</font><font color="#007700">, </font><font color="#0000BB">3</font><font color="#007700">);<br /><br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">$arr1</font><font color="#007700">);<br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">$arr2</font><font color="#007700">);<br /><br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P > Output may look like: </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >Array ( [0] => H [1] => e [2] => l [3] => l [4] => o [5] => [6] => F [7] => r [8] => i [9] => e [10] => n [11] => d ) Array ( [0] => Hel [1] => lo [2] => Fri [3] => end )</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > See also <A HREF="function.chunk-split.html" ><B CLASS="function" >chunk_split()</B ></A >, <A HREF="function.preg-split.html" ><B CLASS="function" >preg_split()</B ></A >, <A HREF="function.explode.html" ><B CLASS="function" >explode()</B ></A >, <A HREF="function.count-chars.html" ><B CLASS="function" >count_chars()</B ></A >, <A HREF="function.str-word-count.html" ><B CLASS="function" >str_word_count()</B ></A >, and <A HREF="control-structures.for.html" >for</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.str-shuffle.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.str-word-count.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >str_shuffle</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.strings.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >str_word_count</TD ></TR ></TABLE ></DIV ></BODY ></HTML >