<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >strcspn</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="strcoll" HREF="function.strcoll.html"><LINK REL="NEXT" TITLE="strip_tags" HREF="function.strip-tags.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.strcoll.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.strip-tags.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.strcspn" ></A >strcspn</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN227502" ></A ><P > (PHP 3 >= 3.0.3, PHP 4, PHP 5)</P >strcspn -- Find length of initial segment not matching mask </DIV ><DIV CLASS="refsect1" ><A NAME="AEN227505" ></A ><H2 >Description</H2 >int <B CLASS="methodname" >strcspn</B > ( string str1, string str2 [, int start [, int length]] )<BR ></BR ><P > Returns the length of the initial segment of <CODE CLASS="parameter" >str1</CODE > which does <SPAN CLASS="emphasis" ><I CLASS="emphasis" >not</I ></SPAN > contain any of the characters in <CODE CLASS="parameter" >str2</CODE >. </P ><P > As of PHP 4.3.0, <B CLASS="function" >strcspn()</B > accepts two optional <A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A > parameters that can be used to define the <CODE CLASS="parameter" >start</CODE > position and the <CODE CLASS="parameter" >length</CODE > of the string to examine. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B >本函数可安全用于二进制对象。</P ></BLOCKQUOTE ></DIV ><P > See also <A HREF="function.strspn.html" ><B CLASS="function" >strspn()</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.strcoll.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.strip-tags.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >strcoll</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" >strip_tags</TD ></TR ></TABLE ></DIV ></BODY ></HTML >