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navbar__search-button-mobile" 239 hidden 240 > 241 <svg 242 xmlns="http://www.w3.org/2000/svg" 243 aria-hidden="true" 244 width="24" 245 viewBox="0 0 24 24" 246 fill="none" 247 stroke="currentColor" 248 stroke-width="2" 249 stroke-linecap="round" 250 stroke-linejoin="round" 251> 252 <circle cx="11" cy="11" r="8"></circle> 253 <line x1="21" y1="21" x2="16.65" y2="16.65"></line> 254</svg> </button> 255 <button 256 id="navbar__menu-button" 257 aria-label="Menu" 258 class="navbar__icon-item navbar_icon-item--visually-aligned" 259 hidden 260 > 261 <svg xmlns="http://www.w3.org/2000/svg" 262 aria-hidden="true" 263 width="24" 264 viewBox="0 0 24 24" 265 fill="currentColor" 266> 267 <path d="M3,6H21V8H3V6M3,11H21V13H3V11M3,16H21V18H3V16Z" /> 268</svg> </button> 269 </div> 270 271 <div 272 id="navbar__backdrop" 273 class="navbar__backdrop" 274 ></div> 275 </div> 276 277 <div id="flash-message"></div> 278</nav> 279<div class="headsup"><a href='/index.php#2026-09-24-5'>PHP 8.4.26 Released!</a></div> 280<nav id="trick"><div><dl> 281<dt><a href='/manual/en/getting-started.php'>Getting Started</a></dt> 282 <dd><a href='/manual/en/introduction.php'>Introduction</a></dd> 283 <dd><a href='/manual/en/tutorial.php'>
283A simple tutorial</a></dd> 284<dt><a href='/manual/en/langref.php'>Language Reference</a></dt> 285 <dd><a href='/manual/en/language.basic-syntax.php'>Basic syntax</a></dd> 286 <dd><a href='/manual/en/language.types.php'>Types</a></dd> 287 <dd><a href='/manual/en/language.variables.php'>Variables</a></dd> 288 <dd><a href='/manual/en/language.constants.php'>Constants</a></dd> 289 <dd><a href='/manual/en/language.expressions.php'>Expressions</a></dd> 290 <dd><a href='/manual/en/language.operators.php'>Operators</a></dd> 291 <dd><a href='/manual/en/language.control-structures.php'>Control Structures</a></dd> 292 <dd><a href='/manual/en/language.functions.php'>Functions</a></dd> 293 <dd><a href='/manual/en/language.oop5.php'>Classes and Objects</a></dd> 294 <dd><a href='/manual/en/language.namespaces.php'>Namespaces</a></dd> 295 <dd><a href='/manual/en/language.enumerations.php'>Enumerations</a></dd> 296 <dd><a href='/manual/en/language.errors.php'>Errors</a></dd> 297 <dd><a href='/manual/en/language.exceptions.php'>Exceptions</a></dd> 298 <dd><a href='/manual/en/language.fibers.php'>Fibers</a></dd> 299 <dd><a href='/manual/en/language.generators.php'>Generators</a></dd> 300 <dd><a href='/manual/en/language.attributes.php'>Attributes</a></dd> 301 <dd><a href='/manual/en/language.references.php'>References Explained</a></dd> 302 <dd><a href='/manual/en/reserved.variables.php'>Predefined Variables</a></dd> 303 <dd><a href='/manual/en/reserved.exceptions.php'>Predefined Exceptions</a></dd> 304 <dd><a href='/manual/en/reserved.interfaces.php'>Predefined Interfaces and Classes</a></dd> 305 <dd><a href='/manual/en/reserved.attributes.php'>Predefined Attributes</a></dd> 306 <dd><a href='/manual/en/context.php'>Context options and parameters</a></dd> 307 <dd><a href='/manual/en/wrappers.php'>Supported Protocols and Wrappers</a></dd> 308</dl> 309<dl> 310<dt><a href='/manual/en/security.php'>Security</a></dt> 311 <dd><a href='/manual/en/security.intro.php'>Introduction</a></dd> 312 <dd><a href='/manual/en/security.general.php'>General considerations</a></dd> 313 <dd><a href='/manual/en/security.cgi-bin.php'>Installed as CGI binary</a></dd> 314 <dd><a href='/manual/en/security.apache.php'>Installed as an Apache module</a></dd> 315 <dd><a href='/manual/en/security.sessions.php'>Session Security</a></dd> 316 <dd><a href='/manual/en/security.filesystem.php'>Filesystem Security</a></dd> 317 <dd><a href='/manual/en/security.database.php'>Database Security</a></dd> 318 <dd><a href='/manual/en/security.errors.php'>Error Reporting</a></dd> 319 <dd><a href='/manual/en/security.variables.php'>User Submitted Data</a></dd> 320 <dd><a href='/manual/en/security.hiding.php'>Hiding PHP</a></dd> 321 <dd><a href='/manual/en/security.current.php'>Keeping Current</a></dd> 322<dt><a href='/manual/en/features.php'>Features</a></dt> 323 <dd><a href='/manual/en/features.http-auth.php'>HTTP authentication with PHP</a></dd> 324 <dd><a href='/manual/en/features.cookies.php'>Cookies</a></dd> 325 <dd><a href='/manual/en/features.sessions.php'>Sessions</a></dd> 326 <dd><a href='/manual/en/features.file-upload.php'>Handling file uploads</a></dd> 327 <dd><a href='/manual/en/features.remote-files.php'>Using remote files</a></dd> 328 <dd><a href='/manual/en/features.connection-handling.php'>Connection handling</a></dd> 329 <dd><a href='/manual/en/features.persistent-connections.php'>Persistent Database Connections</a></dd> 330 <dd><a href='/manual/en/features.commandline.php'>Command line usage</a></dd> 331 <dd><a href='/manual/en/features.gc.php'>Garbage Collection</a></dd> 332 <dd><a href='/manual/en/features.dtrace.php'>DTrace Dynamic Tracing</a></dd> 333</dl> 334<dl> 335<dt><a href='/manual/en/funcref.php'>Function Reference</a></dt> 336 <dd><a href='/manual/en/refs.basic.php.php'>Affecting PHP's Behaviour</a></dd> 337 <dd><a href='/manual/en/refs.utilspec.audio.php'>Audio Formats Manipulation</a></dd> 338 <dd><a href='/manual/en/refs.remote.auth.php'>Authentication Services</a></dd> 339 <dd><a href='/manual/en/refs.utilspec.cmdline.php'>Command Line Specific Extensions</a></dd> 340 <dd><a href='/manual/en/refs.compression.php'>Compression and Archive Extensions</a></dd> 341 <dd><a href='/manual/en/refs.crypto.php'>Cryptography Extensions</a></dd> 342 <dd><a href='/manual/en/refs.database.php'>Database Extensions</a></dd> 343 <dd><a href='/manual/en/refs.calendar.php'>Date and Time Related Extensions</a></dd> 344 <dd><a href='/manual/en/refs.fileprocess.file.php'>File System Related Extensions</a></dd> 345 <dd><a href='/manual/en/refs.international.php'>Human Language and 346 Character Encoding Support</a></dd> 347 <dd><a href='/manual/en/refs.utilspec.image.php'>Image Processing and Generation</a></dd> 348 <dd><a href='/manual/en/refs.remote.mail.php'>Mail Related Extensions</a></dd> 349 <dd><a href='/manual/en/refs.math.php'>Mathematical Extensions</a></dd> 350 <dd><a href='/manual/en/refs.utilspec.nontext.php'>Non-Text MIME Output</a></dd> 351 <dd><a href='/manual/en/refs.fileprocess.process.php'>Process Control Extensions</a></dd> 352 <dd><a href='/manual/en/refs.basic.other.php'>Other Basic Extensions</a></dd> 353 <dd><a href='/manual/en/refs.remote.other.php'>Other Services</a></dd> 354 <dd><a href='/manual/en/refs.search.php'>Search Engine Extensions</a></dd> 355 <dd><a href='/manual/en/refs.utilspec.server.php'>Server Specific Extensions</a></dd> 356 <dd><a href='/manual/en/refs.basic.session.php'>Session Extensions</a></dd> 357 <dd><a href='/manual/en/refs.basic.text.php'>Text Processing</a></dd> 358 <dd><a href='/manual/en/refs.basic.vartype.php'>Variable and Type Related Extensions</a></dd> 359 <dd><a href='/manual/en/refs.webservice.php'>Web Services</a></dd> 360 <dd><a href='/manual/en/refs.utilspec.windows.php'>Windows Only Extensions</a></dd> 361 <dd><a href='/manual/en/refs.xml.php'>XML Manipulation</a></dd> 362 <dd><a href='/manual/en/refs.ui.php'>GUI Extensions</a></dd> 363</dl> 364<dl> 365<dt>Keyboard Shortcuts</dt><dt>?</dt> 366<dd>This help</dd> 367<dt>j</dt> 368<dd>Next menu item</dd> 369<dt>k</dt> 370<dd>Previous menu item</dd> 371<dt>g p</dt> 372<dd>Previous man page</dd> 373<dt>g n</dt> 374<dd>Next man page</dd> 375<dt>G</dt> 376<dd>Scroll to bottom</dd> 377<dt>g g</dt> 378<dd>Scroll to top</dd> 379<dt>g h</dt> 380<dd>Goto homepage</dd> 381<dt>g s</dt> 382<dd>Goto search<br>(current page)</dd> 383<dt>/</dt> 384<dd>Focus search box</dd> 385</dl></div></nav> 386<div id="goto"> 387 <div class="search"> 388 <div class="text"></div> 389 <div class="results"><ul></ul></div> 390 </div> 391</div> 392 393 394 395 396 397<div id="layout" class="clearfix"> 398 <section id="layout-content"> 399 400<h1>Documentation</h1> 401<p> 402 The PHP Manual is available online in a selection of languages. 403 Please pick a language from the list below.
404</p> 405 406<p> 407 View Online: 408<strong><a href="/manual/en/">English</a>, 409</strong><a href="/manual/de/">German</a>, 410<a href="/manual/es/">Spanish</a>, 411<a href="/manual/fr/">French</a>, 412<a href="/manual/it/">Italian</a>, 413<a href="/manual/ja/">Japanese</a>, 414<a href="/manual/pt_BR/">Brazilian Portuguese</a>, 415<a href="/manual/ru/">Russian</a>, 416<a href="/manual/tr/">Turkish</a>, 417<a href="/manual/uk/">Ukrainian</a>, 418<a href="/manual/zh/">Chinese (Simplified)</a> 419</p> 420 421<p> 422 Note that many languages are still being translated, and 423 the untranslated parts are still in English. Some translated 424 parts might be outdated. The translation teams are 425 <a href="https://doc.php.net/">open to contributions</a>. 426</p> 427 428<p> 429 The language currently being used as the default for you should be in 430 <strong>bold</strong> above. You can change the setting for this on the 431 <a href="/my.php">My PHP.net customization page</a>. 432</p> 433 434<p> 435 For downloadable formats, please visit our 436 <a href="download-docs.php">documentation downloads</a> page. 437</p> 438 439<p> 440 Information about php.net URL shortcuts can be found by visiting our 441 <a href="/urlhowto.php">Navigation tips & tricks page</a>. 442</p> 443 444<h2 class="content-header">More documentation</h2> 445<ul class="content-box listed"> 446 <li> 447 If you are interested in how the documentation is edited and translated, 448 you should read the <a href="https://doc.php.net/guide/">contribution guide</a>. 449 </li> 450 <li> 451 <a href="https://pear.php.net/manual/">Documentation of PEAR and the various 452 packages</a> can be found on a separate server. 453 </li> 454 <li> 455 You can still read a copy of the original <a href="/manual/phpfi2.php">PHP/FI 456 2.0 Manual</a> on our site, which we only host for historical purposes. 457 The same applies to the <a href="/manual/php3.php">PHP 3 Manual</a>. 458 </li> 459 <li> 460 The PHP 4 and PHP 5 documentation has been removed from the 461 manual, but archived versions still exist. For 462 more information, please read <a href="/manual/php4.php"> 463 Documentation for PHP 4</a> and <a href="manual/php5.php"> 464 Documentation for 5</a>, respectively. 465 </li> 466</ul> 467 468 </section><!-- layout-content --> 469 470 471 </div><!-- layout --> 472 473 <footer> 474 <div class="container footer-content"> 475 <div class="row-fluid"> 476 <ul class="footmenu"> 477 <li><a href="/copyright.php">Copyright © 2001-2026 The PHP Group</a></li> 478 <li><a href="/my.php">My PHP.net</a></li> 479 <li><a href="/contact.php">Contact</a></li> 480 <li><a href="/sites.php">Other PHP.net sites</a></li> 481 <li><a href="/privacy.php">Privacy policy</a></li> 482 <li><a href="https://github.com/php/web-php/blob/master/public/docs.php">View Source</a></li> 483 </ul> 484 </div> 485 </div> 486 </footer> 487
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