<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >函数参考</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="PREVIOUS" TITLE="PHP 的命令行模式" HREF="features.commandline.html"><LINK REL="NEXT" TITLE=".NET 函数" HREF="ref.dotnet.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="part" 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="features.commandline.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="ref.dotnet.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="PART" ><A NAME="funcref" ></A ><DIV CLASS="TITLEPAGE" ><H1 CLASS="title" >VI. 函数参考</H1 ><DIV CLASS="PARTINTRO" ><A NAME="AEN8195" ></A ><P >See also <A HREF="extensions.html" >附录 J</A >.</P ></DIV ><DIV CLASS="TOC" ><DL ><DT ><B >目录</B ></DT ><DT >I. <A HREF="ref.dotnet.html" >.NET 函数</A ></DT ><DT >II. <A HREF="ref.apache.html" >Apache 特有函数</A ></DT ><DT >III. <A HREF="ref.apc.html" >APC 可选 PHP 缓存</A ></DT ><DT >IV. <A HREF="ref.apd.html" >APD 高级 PHP 调试器</A ></DT ><DT >V. <A HREF="ref.array.html" >Array 数组函数</A ></DT ><DT >VI. <A HREF="ref.aspell.html" >Aspell 函数(已废弃)</A ></DT ><DT >VII. <A HREF="ref.bc.html" >BC math 高精度数学函数</A ></DT ><DT >VIII. <A HREF="ref.bcompiler.html" >BCompiler PHP 字节码编译器</A ></DT ><DT >IX. <A HREF="ref.bzip2.html" >Bzip2 压缩函数</A ></DT ><DT >X. <A HREF="ref.calendar.html" >Calendar 日历函数</A ></DT ><DT >XI. <A HREF="ref.ccvs.html" >CCVS API 函数(已废弃)</A ></DT ><DT >XII. <A HREF="ref.classobj.html" >Classes/Objects 类/对象函数</A ></DT ><DT >XIII. <A HREF="ref.classkit.html" >Classkit 函数</A ></DT ><DT >XIV. <A HREF="ref.cpdf.html" >ClibPDF Functions</A ></DT ><DT >XV. <A HREF="ref.com.html" >COM 和 .Net(Windows)函数</A ></DT ><DT >XVI. <A HREF="ref.crack.html" >Crack Functions</A ></DT ><DT >XVII. <A HREF="ref.ctype.html" >Character Type Functions</A ></DT ><DT >XVIII. <A HREF="ref.curl.html" >CURL, Client URL Library Functions</A ></DT ><DT >XIX. <A HREF="ref.cybercash.html" >Cybercash Payment Functions</A ></DT ><DT >XX. <A HREF="ref.cybermut.html" >Credit Mutuel CyberMUT functions</A ></DT ><DT >XXI. <A HREF="ref.cyrus.html" >Cyrus IMAP administration Functions</A ></DT ><DT >XXII. <A HREF="ref.datetime.html" >Date/Time 日期/时间函数</A ></DT ><DT >XXIII. <A HREF="ref.dbplus.html" >DB++ Functions</A ></DT ><DT >XXIV. <A HREF="ref.dba.html" >Database (dbm-style) Abstraction Layer Functions</A ></DT ><DT >XXV. <A HREF="ref.dbase.html" >dBase Functions</A ></DT ><DT >XXVI. <A HREF="ref.dbm.html" >DBM Functions [deprecated]</A ></DT ><DT >XXVII. <A HREF="ref.dbx.html" >dbx Functions</A ></DT ><DT >XXVIII. <A HREF="ref.dio.html" >Direct IO Functions</A ></DT ><DT >XXIX. <A HREF="ref.dir.html" >Directory 目录函数</A ></DT ><DT >XXX. <A HREF="ref.dom.html" >DOM Functions</A ></DT ><DT >XXXI. <A HREF="ref.domxml.html" >DOM XML Functions</A ></DT ><DT >XXXII. <A HREF="ref.enchant.html" >enchant Functions</A ></DT ><DT >XXXIII. <A HREF="ref.errorfunc.html" >Error Handling and Logging Functions</A ></DT ><DT >XXXIV. <A HREF="ref.exif.html" >Exif Functions</A ></DT ><DT >XXXV. <A HREF="ref.expect.html" >Expect Functions</A ></DT ><DT >XXXVI. <A HREF="ref.fam.html" >File Alteration Monitor Functions</A ></DT ><DT >XXXVII. <A HREF="ref.fdf.html" >Forms Data Format Functions</A ></DT ><DT >XXXVIII. <A HREF="ref.fileinfo.html" >Fileinfo Functions</A ></DT ><DT >XXXIX. <A HREF="ref.filepro.html" >filePro Functions</A ></DT ><DT >XL. <A HREF="ref.filesystem.html" >Filesystem 文件系统函数</A ></DT ><DT >XLI. <A HREF="ref.filter.html" >Filter Functions</A ></DT ><DT >XLII. <A HREF="ref.ibase.html" >Firebird/InterBase Functions</A ></DT ><DT >XLIII. <A HREF="ref.pdo-firebird.html" >Firebird/Interbase Functions (PDO_FIREBIRD)</A ></DT ><DT >XLIV. <A HREF="ref.fribidi.html" >FriBiDi Functions</A ></DT ><DT >XLV. <A HREF="ref.fbsql.html" >FrontBase Functions</A ></DT ><DT >XLVI. <A HREF="ref.ftp.html" >FTP 函数</A ></DT ><DT >XLVII. <A HREF="ref.funchand.html" >Function Handling Functions</A ></DT ><DT >XLVIII. <A HREF="ref.geoip.html" >GeoIP Functions</A ></DT ><DT >XLIX. <A HREF="ref.gettext.html" >Gettext Functions</A ></DT ><DT >L. <A HREF="ref.gmp.html" >GMP Functions</A ></DT ><DT >LI. <A HREF="ref.gnupg.html" >gnupg 函数</A ></DT ><DT >LII. <A HREF="ref.net-gopher.html" >Net_Gopher</A ></DT ><DT >LIII. <A HREF="ref.haru.html" >Haru PDF Functions</A ></DT ><DT >LIV. <A HREF="ref.hash.html" >hash Functions</A ></DT ><DT >LV. <A HREF="ref.http.html" >HTTP 函数</A ></DT ><DT >LVI. <A HREF="ref.hw.html" >Hyperwave Functions</A ></DT ><DT >LVII. <A HREF="ref.hwapi.html" >Hyperwave API Functions</A ></DT ><DT >LVIII. <A HREF="ref.i18n.html" >i18n 函数</A ></DT ><DT >LIX. <A HREF="ref.pdo-ibm.html" >IBM Functions (PDO_IBM)</A ></DT ><DT >LX. <A HREF="ref.ibm-db2.html" >IBM DB2, Cloudscape and Apache Derby Functions</A ></DT ><DT >LXI. <A HREF="ref.icap.html" >ICAP Functions [removed]</A ></DT ><DT >LXII. <A HREF="ref.iconv.html" >iconv Functions</A ></DT ><DT >LXIII. <A HREF="ref.id3.html" >ID3 Functions</A ></DT ><DT >LXIV. <A HREF="ref.iisfunc.html" >IIS Administration Functions</A ></DT ><DT >LXV. <A HREF="ref.image.html" >Image 图像函数</A ></DT ><DT >LXVI. <A HREF="ref.imagick.html" >Image magick Functions</A ></DT ><DT >LXVII. <A HREF="ref.imap.html" >IMAP, POP3 and NNTP Functions</A ></DT ><DT >LXVIII. <A HREF="ref.ifx.html" >Informix Functions</A ></DT ><DT >LXIX. <A HREF="ref.pdo-informix.html" >Informix Functions (PDO_INFORMIX)</A ></DT ><DT >LXX. <A HREF="ref.ingres.html" >Ingres II Functions</A ></DT ><DT >LXXI. <A HREF="ref.ircg.html" >IRC Gateway Functions</A ></DT ><DT >LXXII. <A HREF="ref.java.html" >PHP / Java Integration</A ></DT ><DT >LXXIII. <A HREF="ref.json.html" >JSON Functions</A ></DT ><DT >LXXIV. <A HREF="ref.kadm5.html" >KADM5</A ></DT ><DT >LXXV. <A HREF="ref.ldap.html" >LDAP Functions</A ></DT ><DT >LXXVI. <A HREF="ref.libxml.html" >libxml Functions</A ></DT ><DT >LXXVII. <A HREF="ref.notes.html" >Lotus Notes Functions</A ></DT ><DT >LXXVIII. <A HREF="ref.lzf.html" >LZF Functions</A ></DT ><DT >LXXIX. <A HREF="ref.mail.html" >Mail 邮件函数</A ></DT ><DT >LXXX. <A HREF="ref.mailparse.html" >Mailparse Functions</A ></DT ><DT >LXXXI. <A HREF="ref.math.html" >Math 数学函数</A ></DT ><DT >LXXXII. <A HREF="ref.maxdb.html" >MaxDB PHP Extension</A ></DT ><DT >LXXXIII. <A HREF="ref.mcal.html" >MCAL Functions</A ></DT ><DT >LXXXIV. <A HREF="ref.mcrypt.html" >Mcrypt Encryption Functions</A ></DT ><DT >LXXXV. <A HREF="ref.mcve.html" >MCVE (Monetra) Payment Functions</A ></DT ><DT >LXXXVI. <A HREF="ref.memcache.html" >Memcache Functions</A ></DT ><DT >LXXXVII. <A HREF="ref.mhash.html" >Mhash Functions</A ></DT ><DT >LXXXVIII. <A HREF="ref.mime-magic.html" >Mimetype Functions</A ></DT ><DT >LXXXIX. <A HREF="ref.ming.html" >Ming functions for Flash</A ></DT ><DT >XC. <A HREF="ref.misc.html" >Miscellaneous Functions</A ></DT ><DT >XCI. <A HREF="ref.mnogosearch.html" >mnoGoSearch Functions</A ></DT ><DT >XCII. <A HREF="ref.mssql.html" >Microsoft SQL Server Functions</A ></DT ><DT >XCIII. <A HREF="ref.pdo-dblib.html" >Microsoft SQL Server and Sybase Functions (PDO_DBLIB)</A ></DT ><DT >XCIV. <A HREF="ref.msession.html" >Mohawk Software Session Handler Functions</A ></DT ><DT >XCV. <A HREF="ref.msql.html" >mSQL Functions</A ></DT ><DT >XCVI. <A HREF="ref.mbstring.html" >Multibyte String Functions</A ></DT ><DT >XCVII. <A HREF="ref.muscat.html" >muscat Functions</A ></DT ><DT >XCVIII. <A HREF="ref.mysql.html" >MySQL 函数</A ></DT ><DT >XCIX. <A HREF="ref.pdo-mysql.html" >MySQL Functions (PDO_MYSQL)</A ></DT ><DT >C. <A HREF="ref.mysqli.html" >MySQLi 扩展库</A ></DT ><DT >CI. <A HREF="ref.ncurses.html" >Ncurses Terminal Screen Control Functions</A ></DT ><DT >CII. <A HREF="ref.network.html" >Network Functions</A ></DT ><DT >CIII. <A HREF="ref.newt.html" >Newt Functions</A ></DT ><DT >CIV. <A HREF="ref.nsapi.html" >NSAPI-specific Functions</A ></DT ><DT >CV. <A HREF="ref.objaggregation.html" >Object Aggregation/Composition Functions</A ></DT ><DT >CVI. <A HREF="ref.overload.html" >Object property and method call overloading</A ></DT ><DT >CVII. <A HREF="ref.oci8.html" >Oracle 函数</A ></DT ><DT >CVIII. <A HREF="ref.uodbc.html" >ODBC Functions (Unified)</A ></DT ><DT >CIX. <A HREF="ref.pdo-odbc.html" >ODBC and DB2 Functions (PDO_ODBC)</A ></DT ><DT >CX. <A HREF="ref.oggvorbis.html" >oggvorbis</A ></DT ><DT >CXI. <A HREF="ref.openal.html" >OpenAL Audio Bindings</A ></DT ><DT >CXII. <A HREF="ref.openssl.html" >OpenSSL Functions</A ></DT ><DT >CXIII. <A HREF="ref.oracle.html" >Oracle 函数(已废弃)</A ></DT ><DT >CXIV. <A HREF="ref.pdo-oci.html" >Oracle Functions (PDO_OCI)</A ></DT ><DT >CXV. <A HREF="ref.outcontrol.html" >Output Control 输出控制函数</A ></DT ><DT >CXVI. <A HREF="ref.ovrimos.html" >Ovrimos SQL Functions</A ></DT ><DT >CXVII. <A HREF="ref.paradox.html" >Paradox File Access</A ></DT ><DT >CXVIII. <A HREF="ref.parsekit.html" >Parsekit Functions</A ></DT ><DT >CXIX. <A HREF="ref.pcntl.html" >Process Control Functions</A ></DT ><DT >CXX. <A HREF="ref.pcre.html" >Perl 兼容正则表达式函数</A ></DT ><DT >CXXI. <A HREF="ref.pdf.html" >PDF 函数</A ></DT ><DT >CXXII. <A HREF="ref.pdo.html" >PDO Functions</A ></DT ><DT >CXXIII. <A HREF="ref.phar.html" >Phar archive stream and classes</A ></DT ><DT >CXXIV. <A HREF="ref.info.html" >PHP Options&Information</A ></DT ><DT >CXXV. <A HREF="ref.posix.html" >POSIX Functions</A ></DT ><DT >CXXVI. <A HREF="ref.regex.html" >POSIX 扩展正则表达式函数</A ></DT ><DT >CXXVII. <A HREF="ref.pgsql.html" >PostgreSQL 数据库函数</A ></DT ><DT >CXXVIII. <A HREF="ref.pdo-pgsql.html" >PostgreSQL Functions (PDO_PGSQL)</A ></DT ><DT >CXXIX. <A HREF="ref.printer.html" >Printer Functions</A ></DT ><DT >CXXX. <A HREF="ref.exec.html" >Program Execution Functions</A ></DT ><DT >CXXXI. <A HREF="ref.ps.html" >PostScript document creation</A ></DT ><DT >CXXXII. <A HREF="ref.pspell.html" >Pspell Functions</A ></DT ><DT >CXXXIII. <A HREF="ref.qtdom.html" >qtdom Functions</A ></DT ><DT >CXXXIV. <A HREF="ref.radius.html" >Radius</A ></DT ><DT >CXXXV. <A HREF="ref.rar.html" >Rar Functions</A ></DT ><DT >CXXXVI. <A HREF="ref.readline.html" >GNU Readline</A ></DT ><DT >CXXXVII. <A HREF="ref.recode.html" >GNU Recode Functions</A ></DT ><DT >CXXXVIII. <A HREF="ref.rpmreader.html" >RPM Header Reading 函数</A ></DT ><DT >CXXXIX. <A HREF="ref.runkit.html" >runkit Functions</A ></DT ><DT >CXL. <A HREF="ref.sam.html" >SAM - Simple Asynchronous Messaging</A ></DT ><DT >CXLI. <A HREF="ref.satellite.html" >Satellite CORBA client extension [deprecated]</A ></DT ><DT >CXLII. <A HREF="ref.sca.html" >SCA Functions</A ></DT ><DT >CXLIII. <A HREF="ref.sdo.html" >SDO Functions</A ></DT ><DT >CXLIV. <A HREF="ref.sdo-das-xml.html" >SDO XML Data Access Service Functions</A ></DT ><DT >CXLV. <A HREF="ref.sdo.das.rel.html" >SDO Relational Data Access Service Functions</A ></DT ><DT >CXLVI. <A HREF="ref.sem.html" >Semaphore, Shared Memory and IPC Functions</A ></DT ><DT >CXLVII. <A HREF="ref.sesam.html" >SESAM Database Functions</A ></DT ><DT >CXLVIII. <A HREF="ref.session-pgsql.html" >PostgreSQL Session Save Handler</A ></DT ><DT >CXLIX. <A HREF="ref.session.html" >Session 会话处理函数</A ></DT ><DT >CL. <A HREF="ref.shmop.html" >Shared Memory Functions</A ></DT ><DT >CLI. <A HREF="ref.simplexml.html" >SimpleXML functions</A ></DT ><DT >CLII. <A HREF="ref.snmp.html" >SNMP 函数</A ></DT ><DT >CLIII. <A HREF="ref.soap.html" >SOAP Functions</A ></DT ><DT >CLIV. <A HREF="ref.sockets.html" >Socket Functions</A ></DT ><DT >CLV. <A HREF="ref.spl.html" >Standard PHP Library (SPL) Functions</A ></DT ><DT >CLVI. <A HREF="ref.sqlite.html" >SQLite Functions</A ></DT ><DT >CLVII. <A HREF="ref.pdo-sqlite.html" >SQLite Functions (PDO_SQLITE)</A ></DT ><DT >CLVIII. <A HREF="ref.ssh2.html" >Secure Shell2 Functions</A ></DT ><DT >CLIX. <A HREF="ref.stats.html" >Statistics Functions</A ></DT ><DT >CLX. <A HREF="ref.stream.html" >Stream Functions</A ></DT ><DT >CLXI. <A HREF="ref.strings.html" >String 字符串处理函数</A ></DT ><DT >CLXII. <A HREF="ref.swf.html" >Shockwave Flash Functions</A ></DT ><DT >CLXIII. <A HREF="ref.swish.html" >Swish Functions</A ></DT ><DT >CLXIV. <A HREF="ref.sybase.html" >Sybase Functions</A ></DT ><DT >CLXV. <A HREF="ref.tcpwrap.html" >TCP Wrappers Functions</A ></DT ><DT >CLXVI. <A HREF="ref.tidy.html" >Tidy Functions</A ></DT ><DT >CLXVII. <A HREF="ref.tokenizer.html" >Tokenizer Functions</A ></DT ><DT >CLXVIII. <A HREF="ref.unicode.html" >Unicode Functions</A ></DT ><DT >CLXIX. <A HREF="ref.url.html" >URL 函数</A ></DT ><DT >CLXX. <A HREF="ref.var.html" >Variable 变量函数</A ></DT ><DT >CLXXI. <A HREF="ref.pfpro.html" >Verisign Payflow Pro Functions</A ></DT ><DT >CLXXII. <A HREF="ref.vpopmail.html" >vpopmail Functions</A ></DT ><DT >CLXXIII. <A HREF="ref.w32api.html" >W32api 函数</A ></DT ><DT >CLXXIV. <A HREF="ref.wddx.html" >WDDX Functions</A ></DT ><DT >CLXXV. <A HREF="ref.win32ps.html" >win32ps Functions</A ></DT ><DT >CLXXVI. <A HREF="ref.win32service.html" >win32service Functions</A ></DT ><DT >CLXXVII. <A HREF="ref.xattr.html" >xattr Functions</A ></DT ><DT >CLXXVIII. <A HREF="ref.xdiff.html" >xdiff Functions</A ></DT ><DT >CLXXIX. <A HREF="ref.xml.html" >XML 语法解析函数</A ></DT ><DT >CLXXX. <A HREF="ref.xmlrpc.html" >XML-RPC 函数</A ></DT ><DT >CLXXXI. <A HREF="ref.xmlreader.html" >XMLReader functions</A ></DT ><DT >CLXXXII. <A HREF="ref.xmlwriter.html" >XMLWriter Functions</A ></DT ><DT >CLXXXIII. <A HREF="ref.xsl.html" >XSL functions</A ></DT ><DT >CLXXXIV. <A HREF="ref.xslt.html" >XSLT Functions</A ></DT ><DT >CLXXXV. <A HREF="ref.yaz.html" >YAZ Functions</A ></DT ><DT >CLXXXVI. <A HREF="ref.nis.html" >YP/NIS Functions</A ></DT ><DT >CLXXXVII. <A HREF="ref.zip.html" >Zip File Functions</A ></DT ><DT >CLXXXVIII. <A HREF="ref.zlib.html" >Zlib Compression Functions</A ></DT ></DL ></DIV ></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="features.commandline.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="ref.dotnet.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >PHP 的命令行模式</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" > </TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >.NET 函数</TD ></TR ></TABLE ></DIV ></BODY ></HTML >