<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >strncasecmp</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="strnatcmp" HREF="function.strnatcmp.html"><LINK REL="NEXT" TITLE="strncmp" HREF="function.strncmp.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.strnatcmp.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.strncmp.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.strncasecmp" ></A >strncasecmp</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN227866" ></A ><P > (PHP 4 >= 4.0.2, PHP 5)</P >strncasecmp -- Binary safe case-insensitive string comparison of the first n characters </DIV ><DIV CLASS="refsect1" ><A NAME="AEN227869" ></A ><H2 >Description</H2 >int <B CLASS="methodname" >strncasecmp</B > ( string str1, string str2, int len )<BR ></BR ><P > This function is similar to <A HREF="function.strcasecmp.html" ><B CLASS="function" >strcasecmp()</B ></A >, with the difference that you can specify the (upper limit of the) number of characters (<CODE CLASS="parameter" >len</CODE >) from each string to be used in the comparison. </P ><P > Returns < 0 if <CODE CLASS="parameter" >str1</CODE > is less than <CODE CLASS="parameter" >str2</CODE >; > 0 if <CODE CLASS="parameter" >str1</CODE > is greater than <CODE CLASS="parameter" >str2</CODE >, and 0 if they are equal. </P ><P > See also <A HREF="function.preg-match.html" ><B CLASS="function" >preg_match()</B ></A >, <A HREF="function.strcasecmp.html" ><B CLASS="function" >strcasecmp()</B ></A >, <A HREF="function.strcmp.html" ><B CLASS="function" >strcmp()</B ></A >, <A HREF="function.substr.html" ><B CLASS="function" >substr()</B ></A >, <A HREF="function.stristr.html" ><B CLASS="function" >stristr()</B ></A >, and <A HREF="function.strstr.html" ><B CLASS="function" >strstr()</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.strnatcmp.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.strncmp.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >strnatcmp</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" >strncmp</TD ></TR ></TABLE ></DIV ></BODY ></HTML >