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Title: PHP: Function Reference - Manual

X Title: PHP: Function Reference - Manual

Open Graph Description: Function Reference

X Description: Function Reference

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Domain: php.net

DescriptionFunction Reference
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update page nowhttps://php.net/x-myracloud-5958a2bbbed300a9b9ac631223924e0b/1768198154.688
https://php.net/
Downloads https://php.net/downloads.php
Documentation https://php.net/docs.php
Get Involved https://php.net/get-involved.php
Help https://php.net/support.php
https://php.net/releases/8.5/index.php
https://php.net/lookup-form.php
https://php.net/menu.php
Getting Startedhttps://php.net/manual/en/getting-started.php
Introductionhttps://php.net/manual/en/introduction.php
A simple tutorialhttps://php.net/manual/en/tutorial.php
Language Referencehttps://php.net/manual/en/langref.php
Basic syntaxhttps://php.net/manual/en/language.basic-syntax.php
Typeshttps://php.net/manual/en/language.types.php
Variableshttps://php.net/manual/en/language.variables.php
Constantshttps://php.net/manual/en/language.constants.php
Expressionshttps://php.net/manual/en/language.expressions.php
Operatorshttps://php.net/manual/en/language.operators.php
Control Structureshttps://php.net/manual/en/language.control-structures.php
Functionshttps://php.net/manual/en/language.functions.php
Classes and Objectshttps://php.net/manual/en/language.oop5.php
Namespaceshttps://php.net/manual/en/language.namespaces.php
Enumerationshttps://php.net/manual/en/language.enumerations.php
Errorshttps://php.net/manual/en/language.errors.php
Exceptionshttps://php.net/manual/en/language.exceptions.php
Fibershttps://php.net/manual/en/language.fibers.php
Generatorshttps://php.net/manual/en/language.generators.php
Attributeshttps://php.net/manual/en/language.attributes.php
References Explainedhttps://php.net/manual/en/language.references.php
Predefined Variableshttps://php.net/manual/en/reserved.variables.php
Predefined Exceptionshttps://php.net/manual/en/reserved.exceptions.php
Predefined Interfaces and Classeshttps://php.net/manual/en/reserved.interfaces.php
Predefined Attributeshttps://php.net/manual/en/reserved.attributes.php
Context options and parametershttps://php.net/manual/en/context.php
Supported Protocols and Wrappershttps://php.net/manual/en/wrappers.php
Securityhttps://php.net/manual/en/security.php
Introductionhttps://php.net/manual/en/security.intro.php
General considerationshttps://php.net/manual/en/security.general.php
Installed as CGI binaryhttps://php.net/manual/en/security.cgi-bin.php
Installed as an Apache modulehttps://php.net/manual/en/security.apache.php
Session Securityhttps://php.net/manual/en/security.sessions.php
Filesystem Securityhttps://php.net/manual/en/security.filesystem.php
Database Securityhttps://php.net/manual/en/security.database.php
Error Reportinghttps://php.net/manual/en/security.errors.php
User Submitted Datahttps://php.net/manual/en/security.variables.php
Hiding PHPhttps://php.net/manual/en/security.hiding.php
Keeping Currenthttps://php.net/manual/en/security.current.php
Featureshttps://php.net/manual/en/features.php
HTTP authentication with PHPhttps://php.net/manual/en/features.http-auth.php
Cookieshttps://php.net/manual/en/features.cookies.php
Sessionshttps://php.net/manual/en/features.sessions.php
Handling file uploadshttps://php.net/manual/en/features.file-upload.php
Using remote fileshttps://php.net/manual/en/features.remote-files.php
Connection handlinghttps://php.net/manual/en/features.connection-handling.php
Persistent Database Connectionshttps://php.net/manual/en/features.persistent-connections.php
Command line usagehttps://php.net/manual/en/features.commandline.php
Garbage Collectionhttps://php.net/manual/en/features.gc.php
DTrace Dynamic Tracinghttps://php.net/manual/en/features.dtrace.php
Function Referencehttps://php.net/manual/en/funcref.php
Affecting PHP's Behaviourhttps://php.net/manual/en/refs.basic.php.php
Audio Formats Manipulationhttps://php.net/manual/en/refs.utilspec.audio.php
Authentication Serviceshttps://php.net/manual/en/refs.remote.auth.php
Command Line Specific Extensionshttps://php.net/manual/en/refs.utilspec.cmdline.php
Compression and Archive Extensionshttps://php.net/manual/en/refs.compression.php
Cryptography Extensionshttps://php.net/manual/en/refs.crypto.php
Database Extensionshttps://php.net/manual/en/refs.database.php
Date and Time Related Extensionshttps://php.net/manual/en/refs.calendar.php
File System Related Extensionshttps://php.net/manual/en/refs.fileprocess.file.php
Human Language and Character Encoding Supporthttps://php.net/manual/en/refs.international.php
Image Processing and Generationhttps://php.net/manual/en/refs.utilspec.image.php
Mail Related Extensionshttps://php.net/manual/en/refs.remote.mail.php
Mathematical Extensionshttps://php.net/manual/en/refs.math.php
Non-Text MIME Outputhttps://php.net/manual/en/refs.utilspec.nontext.php
Process Control Extensionshttps://php.net/manual/en/refs.fileprocess.process.php
Other Basic Extensionshttps://php.net/manual/en/refs.basic.other.php
Other Serviceshttps://php.net/manual/en/refs.remote.other.php
Search Engine Extensionshttps://php.net/manual/en/refs.search.php
Server Specific Extensionshttps://php.net/manual/en/refs.utilspec.server.php
Session Extensionshttps://php.net/manual/en/refs.basic.session.php
Text Processinghttps://php.net/manual/en/refs.basic.text.php
Variable and Type Related Extensionshttps://php.net/manual/en/refs.basic.vartype.php
Web Serviceshttps://php.net/manual/en/refs.webservice.php
Windows Only Extensionshttps://php.net/manual/en/refs.utilspec.windows.php
XML Manipulationhttps://php.net/manual/en/refs.xml.php
GUI Extensionshttps://php.net/manual/en/refs.ui.php
Affecting PHP's Behaviour » https://php.net/refs.basic.php.php
« Using SystemTap with PHP DTrace Static Probes https://php.net/features.dtrace.systemtap.php
PHP Manualhttps://php.net/index.php
Extension List/Categorizationhttps://php.net/extensions.php
Affecting PHP's Behaviourhttps://php.net/refs.basic.php.php
APCuhttps://php.net/book.apcu.php
Componerehttps://php.net/book.componere.php
Error Handlinghttps://php.net/book.errorfunc.php
FFIhttps://php.net/book.ffi.php
OPcachehttps://php.net/book.opcache.php
Output Controlhttps://php.net/book.outcontrol.php
PHP Options/Infohttps://php.net/book.info.php
phpdbghttps://php.net/book.phpdbg.php
runkit7https://php.net/book.runkit7.php
uopzhttps://php.net/book.uopz.php
WinCachehttps://php.net/book.wincache.php
Xhprofhttps://php.net/book.xhprof.php
Yachttps://php.net/book.yac.php
Audio Formats Manipulationhttps://php.net/refs.utilspec.audio.php
OpenALhttps://php.net/book.openal.php
Authentication Serviceshttps://php.net/refs.remote.auth.php
Radiushttps://php.net/book.radius.php
Command Line Specific Extensionshttps://php.net/refs.utilspec.cmdline.php
Readlinehttps://php.net/book.readline.php
Compression and Archive Extensionshttps://php.net/refs.compression.php
Bzip2https://php.net/book.bzip2.php
LZFhttps://php.net/book.lzf.php
Pharhttps://php.net/book.phar.php
Rarhttps://php.net/book.rar.php
Ziphttps://php.net/book.zip.php
Zlibhttps://php.net/book.zlib.php
Cryptography Extensionshttps://php.net/refs.crypto.php
Hashhttps://php.net/book.hash.php
Mcrypthttps://php.net/book.mcrypt.php
Mhashhttps://php.net/book.mhash.php
OpenSSLhttps://php.net/book.openssl.php
Password Hashinghttps://php.net/book.password.php
Rnphttps://php.net/book.rnp.php
Sodiumhttps://php.net/book.sodium.php
Xpasshttps://php.net/book.xpass.php
Database Extensionshttps://php.net/refs.database.php
Abstraction Layershttps://php.net/refs.database.abstract.php
Vendor Specific Database Extensionshttps://php.net/refs.database.vendors.php
Date and Time Related Extensionshttps://php.net/refs.calendar.php
Calendarhttps://php.net/book.calendar.php
Date/Timehttps://php.net/book.datetime.php
HRTimehttps://php.net/book.hrtime.php
File System Related Extensionshttps://php.net/refs.fileprocess.file.php
Direct IOhttps://php.net/book.dio.php
Directorieshttps://php.net/book.dir.php
Fileinfohttps://php.net/book.fileinfo.php
Filesystemhttps://php.net/book.filesystem.php
Inotifyhttps://php.net/book.inotify.php
xattrhttps://php.net/book.xattr.php
xdiffhttps://php.net/book.xdiff.php
Human Language and Character Encoding Supporthttps://php.net/refs.international.php
Enchanthttps://php.net/book.enchant.php
Genderhttps://php.net/book.gender.php
Gettexthttps://php.net/book.gettext.php
iconvhttps://php.net/book.iconv.php
intlhttps://php.net/book.intl.php
Multibyte Stringhttps://php.net/book.mbstring.php
Pspellhttps://php.net/book.pspell.php
Recodehttps://php.net/book.recode.php
Image Processing and Generationhttps://php.net/refs.utilspec.image.php
Exifhttps://php.net/book.exif.php
GDhttps://php.net/book.image.php
Gmagickhttps://php.net/book.gmagick.php
ImageMagickhttps://php.net/book.imagick.php
Mail Related Extensionshttps://php.net/refs.remote.mail.php
IMAPhttps://php.net/book.imap.php
Mailhttps://php.net/book.mail.php
Mailparsehttps://php.net/book.mailparse.php
Mathematical Extensionshttps://php.net/refs.math.php
BC Mathhttps://php.net/book.bc.php
GMPhttps://php.net/book.gmp.php
Mathhttps://php.net/book.math.php
Statisticshttps://php.net/book.stats.php
Traderhttps://php.net/book.trader.php
Non-Text MIME Outputhttps://php.net/refs.utilspec.nontext.php
FDFhttps://php.net/book.fdf.php
GnuPGhttps://php.net/book.gnupg.php
wkhtmltoxhttps://php.net/book.wkhtmltox.php
PShttps://php.net/book.ps.php
RpmInfohttps://php.net/book.rpminfo.php
XLSWriterhttps://php.net/book.xlswriter.php
Process Control Extensionshttps://php.net/refs.fileprocess.process.php
Eiohttps://php.net/book.eio.php
Evhttps://php.net/book.ev.php
Expecthttps://php.net/book.expect.php
PCNTLhttps://php.net/book.pcntl.php
POSIXhttps://php.net/book.posix.php
Program executionhttps://php.net/book.exec.php
parallelhttps://php.net/book.parallel.php
pthreadshttps://php.net/book.pthreads.php
Semaphorehttps://php.net/book.sem.php
Shared Memoryhttps://php.net/book.shmop.php
Synchttps://php.net/book.sync.php
Other Basic Extensionshttps://php.net/refs.basic.other.php
GeoIPhttps://php.net/book.geoip.php
FANNhttps://php.net/book.fann.php
Igbinaryhttps://php.net/book.igbinary.php
JSONhttps://php.net/book.json.php
Simdjsonhttps://php.net/book.simdjson.php
Luahttps://php.net/book.lua.php
LuaSandboxhttps://php.net/book.luasandbox.php
Misc.https://php.net/book.misc.php
Randomhttps://php.net/book.random.php
Seasloghttps://php.net/book.seaslog.php
SPLhttps://php.net/book.spl.php
Streamshttps://php.net/book.stream.php
Swoolehttps://php.net/book.swoole.php
Tidyhttps://php.net/book.tidy.php
Tokenizerhttps://php.net/book.tokenizer.php
URLshttps://php.net/book.url.php
V8jshttps://php.net/book.v8js.php
Yamlhttps://php.net/book.yaml.php
Yafhttps://php.net/book.yaf.php
Yaconfhttps://php.net/book.yaconf.php
Tainthttps://php.net/book.taint.php
Data Structureshttps://php.net/book.ds.php
var_representationhttps://php.net/book.var_representation.php
Other Serviceshttps://php.net/refs.remote.other.php
cURLhttps://php.net/book.curl.php
Eventhttps://php.net/book.event.php
FTPhttps://php.net/book.ftp.php
Gearmanhttps://php.net/book.gearman.php
LDAPhttps://php.net/book.ldap.php
Memcachehttps://php.net/book.memcache.php
Memcachedhttps://php.net/book.memcached.php
mqserieshttps://php.net/book.mqseries.php
Networkhttps://php.net/book.network.php
RRDhttps://php.net/book.rrd.php
ScoutAPMhttps://php.net/book.scoutapm.php
SNMPhttps://php.net/book.snmp.php
Socketshttps://php.net/book.sockets.php
SSH2https://php.net/book.ssh2.php
Stomphttps://php.net/book.stomp.php
SVMhttps://php.net/book.svm.php
SVNhttps://php.net/book.svn.php
TCPhttps://php.net/book.tcpwrap.php
Varnishhttps://php.net/book.varnish.php
YAZhttps://php.net/book.yaz.php
0MQ messaginghttps://php.net/book.zmq.php
ZooKeeperhttps://php.net/book.zookeeper.php
Search Engine Extensionshttps://php.net/refs.search.php
Solrhttps://php.net/book.solr.php
Server Specific Extensionshttps://php.net/refs.utilspec.server.php
Apachehttps://php.net/book.apache.php
FastCGI Process Managerhttps://php.net/book.fpm.php
Session Extensionshttps://php.net/refs.basic.session.php
Sessionshttps://php.net/book.session.php
Text Processinghttps://php.net/refs.basic.text.php
CommonMarkhttps://php.net/book.cmark.php
Parlehttps://php.net/book.parle.php
PCREhttps://php.net/book.pcre.php
ssdeephttps://php.net/book.ssdeep.php
Stringshttps://php.net/book.strings.php
Variable and Type Related Extensionshttps://php.net/refs.basic.vartype.php
Arrayshttps://php.net/book.array.php
Classes/Objectshttps://php.net/book.classobj.php
Ctypehttps://php.net/book.ctype.php
Filterhttps://php.net/book.filter.php
Function Handlinghttps://php.net/book.funchand.php
Quickhashhttps://php.net/book.quickhash.php
Reflectionhttps://php.net/book.reflection.php
Variable handlinghttps://php.net/book.var.php
Web Serviceshttps://php.net/refs.webservice.php
OAuthhttps://php.net/book.oauth.php
SOAPhttps://php.net/book.soap.php
Yarhttps://php.net/book.yar.php
XML-RPChttps://php.net/book.xmlrpc.php
Windows Only Extensionshttps://php.net/refs.utilspec.windows.php
COMhttps://php.net/book.com.php
win32servicehttps://php.net/book.win32service.php
XML Manipulationhttps://php.net/refs.xml.php
DOMhttps://php.net/book.dom.php
libxmlhttps://php.net/book.libxml.php
SimpleXMLhttps://php.net/book.simplexml.php
WDDXhttps://php.net/book.wddx.php
XMLDiffhttps://php.net/book.xmldiff.php
XML Parserhttps://php.net/book.xml.php
XMLReaderhttps://php.net/book.xmlreader.php
XMLWriterhttps://php.net/book.xmlwriter.php
XSLhttps://php.net/book.xsl.php
GUI Extensionshttps://php.net/refs.ui.php
UIhttps://php.net/book.ui.php
Learn How To Improve This Pagehttps://github.com/php/doc-base/blob/master/README.md
Submit a Pull Requesthttps://github.com/php/doc-base/blob/master/manual.xml
Report a Bughttps://github.com/php/doc-en/issues/new?body=From%20manual%20page:%20https:%2F%2Fphp.net%2Ffuncref%0A%0A---
＋add a notehttps://php.net/manual/add-note.php?sect=funcref&repo=en&redirect=https://www.php.net/manual/en/funcref.php
PHP Manualhttps://php.net/index.php
Copyrighthttps://php.net/copyright.php
Prefacehttps://php.net/preface.php
Getting Startedhttps://php.net/getting-started.php
Installation and Configurationhttps://php.net/install.php
Language Referencehttps://php.net/langref.php
Securityhttps://php.net/security.php
Featureshttps://php.net/features.php
Function Referencehttps://php.net/funcref.php
FAQhttps://php.net/faq.php
Appendiceshttps://php.net/appendices.php
Copyright © 2001-2026 The PHP Documentation Grouphttps://php.net/manual/en/copyright.php
My PHP.nethttps://php.net/my.php
Contacthttps://php.net/contact.php
Other PHP.net siteshttps://php.net/sites.php
Privacy policyhttps://php.net/privacy.php
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