PHP Var_dump() Function - W3Schools

Tutorials References Exercises Certificates Menu Search field × See More Sign In ★ +1 Get Certified Upgrade For Teachers Spaces Get Certified Upgrade For Teachers Spaces  My W3Schools Tutorials References Exercises Certificates Spaces Get Certified Plus Academy All our Services Logout     ×

Tutorials

Tutorials filter input ×

HTML and CSS

Learn HTML Tutorial Reference Learn CSS Tutorial Reference Learn RWD Tutorial Learn Bootstrap Overview Learn W3.CSS Tutorial Reference Learn Sass Tutorial Reference Learn Colors Tutorial Reference Learn Icons Tutorial Reference Learn SVG Tutorial Reference Learn Canvas Tutorial Reference Learn Graphics Tutorial Learn UTF-8 and Emojis Reference Learn How To Tutorial

Data Analytics

Learn AI Tutorial Learn Generative AI Tutorial Learn ChatGPT-3.5 Tutorial Learn ChatGPT-4 Tutorial Learn Google Bard Tutorial Learn Machine Learning Tutorial Learn DSA Tutorial Learn Data Science Tutorial Learn NumPy Tutorial Learn Pandas Tutorial Learn SciPy Tutorial Learn Matplotlib Tutorial Learn Statistics Tutorial Learn Excel Tutorial Learn Google Sheets Tutorial

Web Building

Create a Website HOT! Create a Server NEW Where To Start Web Templates Web Statistics Web Certificates Web Development Introduction to Programming Introduction to HTML & CSS Code Editor Test Your Typing Speed Play a Code Game Cyber Security Accessibility Join our Newsletter

JavaScript

Learn JavaScript Tutorial Reference Learn React Tutorial Learn jQuery Tutorial Reference Learn Vue Tutorial Reference Learn Angular Tutorial Learn AngularJS Tutorial Reference Learn JSON Tutorial Reference Learn AJAX Tutorial Learn AppML Tutorial Reference Learn W3.JS Tutorial Reference

Web Building

Create a Website HOT! Create a Server NEW Where To Start Web Templates Web Statistics Web Certificates Web Development Introduction to Programming Introduction to HTML & CSS Code Editor Test Your Typing Speed Play a Code Game Cyber Security Accessibility Join our Newsletter

Backend

Learn Python Tutorial Reference Learn SQL Tutorial Reference Learn MySQL Tutorial Reference Learn PHP Tutorial Reference Learn Java Tutorial Reference Learn C Tutorial Reference Learn C++ Tutorial Reference Learn C# Tutorial Learn R Tutorial Learn Kotlin Tutorial Learn Rust Tutorial Learn Go Tutorial Learn Django Tutorial Reference Learn PostgreSQL Tutorial Learn TypeScript Tutorial Learn ASP Tutorial Reference Learn Node.js Tutorial Reference Learn Raspberry Pi Tutorial Learn Swift Tutorial Learn Git Tutorial Learn Bash Tutorial Learn MongoDB Tutorial Learn AWS Cloud Tutorial Learn XML Tutorial Reference

Data Analytics

Learn AI Tutorial Learn Generative AI Tutorial Learn ChatGPT-3.5 Tutorial Learn ChatGPT-4 Tutorial Learn Google Bard Tutorial Learn Machine Learning Tutorial Learn DSA Tutorial Learn Data Science Tutorial Learn NumPy Tutorial Learn Pandas Tutorial Learn SciPy Tutorial Learn Matplotlib Tutorial Learn Statistics Tutorial Learn Excel Tutorial Learn Google Sheets Tutorial

Web Building

Create a Website HOT! Create a Server NEW Where To Start Web Templates Web Statistics Web Certificates Web Development Introduction to Programming Introduction to HTML & CSS Code Editor Test Your Typing Speed Play a Code Game Cyber Security Accessibility Join our Newsletter ×

References

References filter input ×

HTML and CSS

HTML Tags Reference CSS Reference W3.CSS Reference Bootstrap 3 Reference Bootstrap 4 Reference Color Names Icons Reference SVG Reference Canvas Reference Sass Reference UTF-8 Charset Reference UTF-8 Emojis Reference

JavaScript

JavaScript Reference jQuery Reference Vue Reference Angular Reference JSON Reference AppML Reference W3.JS Reference

Backend

Python Reference SQL Reference MySQL Reference PHP Reference Java Reference C Reference C++ Reference Django Reference ASP Reference Node.js Reference XML Reference ×

Exercises

Excercises filter input ×

HTML and CSS

HTML Exercise Quiz CSS Exercise Quiz Bootstrap 3 Exercise Quiz Bootstrap 4 Exercise Quiz Bootstrap 5 Exercise Quiz

Data Analytics

DSA Exercise Quiz NumPy Exercise Quiz Pandas Exercise Quiz SciPy Exercise Quiz Excel Exercise What is an Exercise? What is a Quiz?

JavaScript

JavaScript Exercise Quiz React Exercise Quiz jQuery Exercise Quiz Vue Exercise Quiz Angular Exercise Quiz

Backend

Python Exercise Quiz SQL Exercise Quiz MySQL Exercise Quiz PHP Exercise Quiz Java Exercise Quiz C Exercise Quiz C++ Exercise Quiz C# Exercise Quiz R Exercise Quiz Kotlin Exercise Quiz Django Exercise Quiz Node.js Exercise Quiz PostgreSQL Exercise Quiz TypeScript Exercise Quiz Git Exercise Quiz Bash Exercise Quiz Go Exercise MongoDB Exercise

Data Analytics

DSA Exercise Quiz NumPy Exercise Quiz Pandas Exercise Quiz SciPy Exercise Quiz Excel Exercise What is an Exercise? What is a Quiz? ×

Certificates

Filter field for certifications ×

HTML and CSS

HTML Certificate Course CSS Certificate Course Bootstrap 3 Certificate Course Bootstrap 4 Certificate Course Bootstrap 5 Certificate

Data Analytics

DSA Certificate Data Analytics Course NumPy Certificate Course Pandas Certificate Course Excel Certificate Social Media Course What is a Certificate?

Programs

Full Access Best Value! Front End Certificate Course Web Dev. Certificate Course Web App Certificate Course Web Design Certificate Course

JavaScript

JavaScript Certificate Course React Certificate Course jQuery Certificate Course Vue Certificate

Programs

Full Access Best Value! Front End Certificate Course Web Dev. Certificate Course Web App Certificate Course Web Design Certificate Course

Programs

Full Access Best Value! Front End Certificate Course Web Dev. Certificate Course Web App Certificate Course Web Design Certificate Course

Backend

Python Certificate Course SQL Certificate Course MySQL Certificate PHP Certificate Course Java Certificate Course C Certificate C++ Certificate Course C# Certificate Course R Course Django Certificate NodeJS Certificate TypeScript Certificate Course XML Certificate Course Cyber Security Certificate Course Accessibility Certificate Course

Data Analytics

DSA Exam Data Analytics Course NumPy Course Pandas Course Excel Certificate Social Media Course What is a Certificate? ×

All Our Services

Dark mode  Services filter input ×

W3Schools offers a wide range of services and products for beginners and professionals, helping millions of people everyday to learn and master new skills.

Free Tutorials

Enjoy our free tutorials like millions of other internet users since 1999

References

Explore our selection of references covering all popular coding languages

Create a Website

Create your own website with W3Schools Spaces - no setup required

Exercises

Test your skills with different exercises

Quizzes

Test yourself with multiple choice questions

Get Certified

Document your knowledge

Log in / Sign Up

Create an account to track your progress

Leaderboard

Earn XP and climb the ranks with different challenges

Upgrade

Become a PLUS user and unlock powerful features (ad-free, hosting, support,..)

Where To Start

Not sure where you want to start? Follow our guided path

Code Editor (Try it)

With our online code editor, you can edit code and view the result in your browser

Videos

Learn the basics of HTML in a fun and engaging video tutorial

Templates

We have created a bunch of responsive website templates you can use - for free!

Web Hosting

Host your own website, and share it to the world with W3Schools Spaces

Create a Server

Create your own server using Python, PHP, React.js, Node.js, Java, C#, etc.

How To's

Large collection of code snippets for HTML, CSS and JavaScript

CSS Framework

Build fast and responsive sites using our free W3.CSS framework

Browser Statistics

Read long term trends of browser usage

Typing Speed

Test your typing speed

Color Picker

Use our color picker to find different RGB, HEX and HSL colors.

Code Game

W3Schools Coding Game! Help the lynx collect pine cones

Newsletter

Join our newsletter and get access to exclusive content every month

Emojis Reference

Check out our refererence page with all the emojis supported in HTML 😊

UTF-8 Reference

Check out our full UTF-8 Character reference

Community

Chat, Learn and Connect with Us on Discord

For Teachers

Contact us about W3Schools Academy for educational institutions

For Businesses

Contact us about W3Schools Academy for your organization

Contact Us

About sales: [email protected] About errors: [email protected]

    × ❮ ❯ HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS DSA TYPESCRIPT ANGULAR ANGULARJS GIT POSTGRESQL MONGODB ASP AI R GO KOTLIN SWIFT SASS VUE GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE INTRO TO PROGRAMMING INTRO TO HTML & CSS BASH RUST

PHP Tutorial

PHP HOME PHP Intro PHP Install PHP Syntax PHP Comments PHP Comments PHP Multiline Comments PHP Variables Variables Variables Scope PHP Echo / Print PHP Data Types PHP Strings PHP Strings String Functions Modify Strings Concatenate Strings Slicing Strings Escape Characters PHP Numbers PHP Casting PHP Math PHP Constants PHP Magic Constants PHP Operators PHP If...Else...Elseif PHP If PHP If Operators PHP If...Else PHP Shorthand if PHP Nested if PHP Switch PHP Loops Loops While Loop Do While Loop For Loop Foreach Loop Break Statement Continue Statement PHP Functions PHP Arrays Arrays Indexed Arrays Associative Arrays Create Arrays Access Array Items Update Array Items Add Array Items Remove Array Items Sorting Arrays Multidimensional Arrays Array Functions PHP Superglobals Superglobals $GLOBALS $_SERVER $_REQUEST $_POST $_GET PHP RegEx

PHP Forms

PHP Form Handling PHP Form Validation PHP Form Required PHP Form URL/E-mail PHP Form Complete

PHP Advanced

PHP Date and Time PHP Include PHP File Handling PHP File Open/Read PHP File Create/Write PHP File Upload PHP Cookies PHP Sessions PHP Filters PHP Filters Advanced PHP Callback Functions PHP JSON PHP Exceptions

PHP OOP

PHP What is OOP PHP Classes/Objects PHP Constructor PHP Destructor PHP Access Modifiers PHP Inheritance PHP Constants PHP Abstract Classes PHP Interfaces PHP Traits PHP Static Methods PHP Static Properties PHP Namespaces PHP Iterables

MySQL Database

MySQL Database MySQL Connect MySQL Create DB MySQL Create Table MySQL Insert Data MySQL Get Last ID MySQL Insert Multiple MySQL Prepared MySQL Select Data MySQL Where MySQL Order By MySQL Delete Data MySQL Update Data MySQL Limit Data

PHP XML

PHP XML Parsers PHP SimpleXML Parser PHP SimpleXML - Get PHP XML Expat PHP XML DOM

PHP - AJAX

AJAX Intro AJAX PHP AJAX Database AJAX XML AJAX Live Search AJAX Poll

PHP Examples

PHP Examples PHP Compiler PHP Quiz PHP Exercises PHP Server PHP Syllabus PHP Study Plan PHP Certificate

PHP Reference

PHP Overview PHP Array array() array_change_key_case() array_chunk() array_column() array_combine() array_count_values() array_diff() array_diff_assoc() array_diff_key() array_diff_uassoc() array_diff_ukey() array_fill() array_fill_keys() array_filter() array_flip() array_intersect() array_intersect_assoc() array_intersect_key() array_intersect_uassoc() array_intersect_ukey() array_key_exists() array_keys() array_map() array_merge() array_merge_recursive() array_multisort() array_pad() array_pop() array_product() array_push() array_rand() array_reduce() array_replace() array_replace_recursive() array_reverse() array_search() array_shift() array_slice() array_splice() array_sum() array_udiff() array_udiff_assoc() array_udiff_uassoc() array_uintersect() array_uintersect_assoc() array_uintersect_uassoc() array_unique() array_unshift() array_values() array_walk() array_walk_recursive() arsort() asort() compact() count() current() each() end() extract() in_array() key() krsort() ksort() list() natcasesort() natsort() next() pos() prev() range() reset() rsort() shuffle() sizeof() sort() uasort() uksort() usort() PHP Calendar cal_days_in_month() cal_from_jd() cal_info() cal_to_jd() easter_date() easter_days() frenchtojd() gregoriantojd() jddayofweek() jdmonthname() jdtofrench() jdtogregorian() jdtojewish() jdtojulian() jdtounix() jewishtojd() juliantojd() unixtojd() PHP Date checkdate() date_add() date_create_from_format() date_create() date_date_set() date_default_timezone_get() date_default_timezone_set() date_diff() date_format() date_get_last_errors() date_interval_create_from_date_string() date_interval_format() date_isodate_set() date_modify() date_offset_get() date_parse_from_format() date_parse() date_sub() date_sun_info() date_sunrise() date_sunset() date_time_set() date_timestamp_get() date_timestamp_set() date_timezone_get() date_timezone_set() date() getdate() gettimeofday() gmdate() gmmktime() gmstrftime() idate() localtime() microtime() mktime() strftime() strptime() strtotime() time() timezone_abbreviations_list() timezone_identifiers_list() timezone_location_get() timezone_name_from_abbr() timezone_name_get() timezone_offset_get() timezone_open() timezone_transitions_get() timezone_version_get() PHP Directory chdir() chroot() closedir() dir() getcwd() opendir() readdir() rewinddir() scandir() PHP Error debug_backtrace() debug_print_backtrace() error_get_last() error_log() error_reporting() restore_error_handler() restore_exception_handler() set_error_handler() set_exception_handler() trigger_error() PHP Exception Exception() getCode() getFile() getMessage() getLine() getPrevious() getTrace() getTraceAsString() PHP Filesystem basename() chgrp() chmod() chown() clearstatcache() copy() delete() dirname() disk_free_space() disk_total_space() diskfreespace() fclose() feof() fflush() fgetc() fgetcsv() fgets() fgetss() file() file_exists() file_get_contents() file_put_contents() fileatime() filectime() filegroup() fileinode() filemtime() fileowner() fileperms() filesize() filetype() flock() fnmatch() fopen() fpassthru() fputcsv() fputs() fread() fscanf() fseek() fstat() ftell() ftruncate() fwrite() glob() is_dir() is_executable() is_file() is_link() is_readable() is_uploaded_file() is_writable() is_writeable() lchgrp() lchown() link() linkinfo() lstat() mkdir() move_uploaded_file() parse_ini_file() parse_ini_string() pathinfo() pclose() popen() readfile() readlink() realpath() realpath_cache_get() realpath_cache_size() rename() rewind() rmdir() set_file_buffer() stat() symlink() tempnam() tmpfile() touch() umask() unlink() PHP Filter filter_has_var() filter_id() filter_input() filter_input_array() filter_list() filter_var() filter_var_array() PHP FTP ftp_alloc() ftp_cdup() ftp_chdir() ftp_chmod() ftp_close() ftp_connect() ftp_delete() ftp_exec() ftp_fget() ftp_fput() ftp_get() ftp_get_option() ftp_login() ftp_mdtm() ftp_mkdir() ftp_mlsd() ftp_nb_continue() ftp_nb_fget() ftp_nb_fput() ftp_nb_get() ftp_nb_put() ftp_nlist() ftp_pasv() ftp_put() ftp_pwd() ftp_quit() ftp_raw() ftp_rawlist() ftp_rename() ftp_rmdir() ftp_set_option() ftp_site() ftp_size() ftp_ssl_connect() ftp_systype() PHP JSON json_decode() json_encode() PHP Keywords abstract and as break callable case catch class clone const continue declare default do echo else elseif empty enddeclare endfor endforeach endif endswitch endwhile extends final finally fn for foreach function global if implements include include_once instanceof insteadof interface isset list namespace new or print private protected public require require_once return static switch throw trait try use var while xor yield yield from PHP Libxml libxml_clear_errors() libxml_disable_entity_loader() libxml_get_errors() libxml_get_last_error() libxml_set_external_entity_loader() libxml_set_streams_context() libxml_use_internal_errors() PHP Mail ezmlm_hash() mail() PHP Math abs() acos() acosh() asin() asinh() atan() atan2() atanh() base_convert() bindec() ceil() cos() cosh() decbin() dechex() decoct() deg2rad() exp() expm1() floor() fmod() getrandmax() hexdec() hypot() intdiv() is_finite() is_infinite() is_nan() lcg_value() log() log10() log1p() max() min() mt_getrandmax() mt_rand() mt_srand() octdec() pi() pow() rad2deg() rand() round() sin() sinh() sqrt() srand() tan() tanh() PHP Misc connection_aborted() connection_status() connection_timeout() constant() define() defined() die() eval() exit() get_browser() __halt_compiler() highlight_file() highlight_string() hrtime() ignore_user_abort() pack() php_strip_whitespace() show_source() sleep() sys_getloadavg() time_nanosleep() time_sleep_until() uniqid() unpack() usleep() PHP MySQLi affected_rows autocommit change_user character_set_name close commit connect connect_errno connect_error data_seek debug dump_debug_info errno error error_list fetch_all fetch_array fetch_assoc fetch_field fetch_field_direct fetch_fields fetch_lengths fetch_object fetch_row field_count field_seek get_charset get_client_info get_client_stats get_client_version get_connection_stats get_host_info get_proto_info get_server_info get_server_version info init insert_id kill more_results multi_query next_result options ping poll prepare query real_connect real_escape_string real_query reap_async_query refresh rollback select_db set_charset set_local_infile_handler sqlstate ssl_set stat stmt_init thread_id thread_safe use_result warning_count PHP Network checkdnsrr() closelog() dns_check_record() dns_get_mx() dns_get_record() fsockopen() gethostbyaddr() gethostbyname() gethostbynamel() gethostname() getmxrr() getprotobyname() getprotobynumber() getservbyname() getservbyport() header_register_callback() header_remove() header() headers_list() headers_sent() http_response_code() inet_ntop() inet_pton() ip2long() long2ip() openlog() pfsockopen() setcookie() setrawcookie() socket_get_status() socket_set_blocking() socket_set_timeout() syslog() PHP Output Control flush() ob_clean() ob_end_clean() ob_end_flush() ob_flush() ob_get_clean() ob_get_contents() ob_get_flush() ob_get_length() ob_get_level() ob_gzhandler() ob_implicit_flush() ob_list_handlers() ob_start() output_add_rewrite_var() output_reset_rewrite_vars() PHP RegEx preg_filter() preg_grep() preg_last_error() preg_match() preg_match_all() preg_replace preg_replace_callback preg_replace_callback_array preg_split preg_quote PHP SimpleXML __construct() __tostring() addAttribute() addChild() asXML() attributes() children() count() getDocNamespaces() getName() getNamespaces() registerXPathNamespace() saveXML() simplexml_import_dom() simplexml_load_file() simplexml_load_string() xpath() current() getchildren() haschildren() key() next() rewind() valid() PHP Stream PHP String addcslashes() addslashes() bin2hex() chop() chr() chunk_split() convert_cyr_string() convert_uudecode() convert_uuencode() count_chars() crc32() crypt() echo() explode() fprint() get_html_translation_table() hebrev() hebrevc() hex2bin() html_entity_decode() htmlentities() htmlspecialchars_decode() htmlspecialchars() implode() join() lcfirst() levenshtein() localeconv() ltrim() md5() md5_file() metaphone() money_format() nl_langinfo() nl2br() number_format() ord() parse_str() print() printf() quoted_printable_decode() quoted_printable_encode() quotemeta() rtrim() setlocale() sha1() sha1_file() similar_text() soundex() sprintf() sscanf() str_contains() str_ends_with() str_getcsv() str_ireplace() str_pad() str_repeat() str_replace() str_rot13() str_shuffle() str_split() str_starts_with() str_word_count() strcasecmp() strchr() strcmp() strcoll() strcspn() strip_tags() stripcslashes() stripslashes() stripos() stristr() strlen() strnatcasecmp() strnatcmp() strncasecmp() strncmp() strpbrk() strpos() strrchr() strrev() strripos() strrpos() strspn() strstr() strtok() strtolower() strtoupper() strtr() substr() substr_compare() substr_count() substr_replace() trim() ucfirst() ucwords() vfprintf() vprintf() vsprintf() wordwrap() PHP Variable Handling boolval() debug_zval_dump() doubleval() is_countable() empty() floatval() get_defined_vars() get_resource_type() gettype() intval() is_array() is_bool() is_callable() is_double() is_float() is_int() is_integer() is_iterable() is_long() is_null() is_numeric() is_object() is_real() is_resource() is_scalar() is_string() isset() print_r() serialize() settype() strval() unserialize() unset() var_dump() var_export() PHP XML Parser utf8_decode() utf8_encode() xml_error_string() xml_get_current_byte_index() xml_get_current_column_number() xml_get_current_line_number() xml_get_error_code() xml_parse() xml_parse_into_struct() xml_parser_create_ns() xml_parser_create() xml_parser_free() xml_parser_get_option() xml_parser_set_option() xml_set_character_data_handler() xml_set_default_handler() xml_set_element_handler() xml_set_end_namespace_decl_handler() xml_set_external_entity_ref_handler() xml_set_notation_decl_handler() xml_set_object() xml_set_processing_instruction_handler() xml_set_start_namespace_decl_handler() xml_set_unparsed_entity_decl_handler() PHP Zip zip_close() zip_entry_close() zip_entry_compressedsize() zip_entry_compressionmethod() zip_entry_filesize() zip_entry_name() zip_entry_open() zip_entry_read() zip_open() zip_read() PHP Timezones PHP var_dump() Function

❮ PHP Variable Handling Reference

Example

Dump information about different variables:

<?php $a = 32;echo var_dump($a) . "<br>";$b = "Hello world!";echo var_dump($b) . "<br>";$c = 32.5;echo var_dump($c) . "<br>";$d = array("red", "green", "blue");echo var_dump($d) . "<br>"; $e = array(32, "Hello world!", 32.5, array("red", "green", "blue"));echo var_dump($e) . "<br>";// Dump two variablesecho var_dump($a, $b) . "<br>";?> Try it Yourself »

Definition and Usage

The var_dump() function dumps information about one or more variables. The information holds type and value of the variable(s).

Syntax

var_dump(var1, var2, ...);

Parameter Values

Parameter	Description
var1, var2, ...	Required. Specifies the variable(s) to dump information from

Technical Details

Return Value:	Nothing
Return Type:	-
PHP Version:	4.0+

❮ PHP Variable Handling Reference ★ +1 Sign in to track progress

COLOR PICKER

REMOVE ADS

PLUS SPACES GET CERTIFIED FOR TEACHERS FOR BUSINESS CONTACT US ×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:[email protected]

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:[email protected]

Top Tutorials

HTML Tutorial CSS Tutorial JavaScript Tutorial How To Tutorial SQL Tutorial Python Tutorial W3.CSS Tutorial Bootstrap Tutorial PHP Tutorial Java Tutorial C++ Tutorial jQuery Tutorial

Top References

HTML Reference CSS Reference JavaScript Reference SQL Reference Python Reference W3.CSS Reference Bootstrap Reference PHP Reference HTML Colors Java Reference AngularJS Reference jQuery Reference

Top Examples

HTML Examples CSS Examples JavaScript Examples How To Examples SQL Examples Python Examples W3.CSS Examples Bootstrap Examples PHP Examples Java Examples XML Examples jQuery Examples

Get Certified

HTML Certificate CSS Certificate JavaScript Certificate Front End Certificate SQL Certificate Python Certificate PHP Certificate jQuery Certificate Java Certificate C++ Certificate C# Certificate XML Certificate     FORUM ABOUT ACADEMY W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookies and privacy policy. Copyright 1999-2025 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.