This is a Javascript version of the PHP function: in_array.

I have moved out PHP.JS to it's own site. For info & reactions on comments please goto phpjs.org

PHP in_array

Description

in_array - Checks if a value exists in an array

bool in_array( mixed needle , array haystack [, bool strict] )

Searches haystack for needle and returns TRUE if it is found in the array, FALSE otherwise.

See Also

• javascript array_search()
• javascript array_key_exists()
• javascript isset()

Javascript in_array

Source

This is the main source of the Javascript version of PHP's in_array

function in_array(needle, haystack, argStrict) {
    // http://kevin.vanzonneveld.net
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: vlado houba
    // *     example 1: in_array('van', ['Kevin', 'van', 'Zonneveld']);
    // *     returns 1: true
    // *     example 2: in_array('vlado', {0: 'Kevin', vlado: 'van', 1: 'Zonneveld'});
    // *     returns 2: false
    // *     example 3: in_array(1, ['1', '2', '3']);
    // *     returns 3: true
    // *     example 3: in_array(1, ['1', '2', '3'], false);
    // *     returns 3: true
    // *     example 4: in_array(1, ['1', '2', '3'], true);
    // *     returns 4: false
 
    var key = '', strict = !!argStrict;
 
    if (strict) {
        for (key in haystack) {
            if (haystack[key] === needle) {
                return true;
            }
        }
    } else {
        for (key in haystack) {
            if (haystack[key] == needle) {
                return true;
            }
        }
    }
 
    return false;
}

Examples

Currently there is 1 example

Example 1

in_array('van', ['Kevin', 'van', 'Zonneveld']);

true

More about this Project

Download php.js

To easily include it in your code, every function currently available is stored in

Normal

• uncompressed source: php.js
• minified: php.min.js [recommended]
• compressed: php.packed.js

Namespaced What is 'namespaced?'

• uncompressed source: php.namespaced.js
• minified: php.namespaced.min.js
• compressed: php.namespaced.packed.js

To download use Right click, Save Link As
Generally the best way is to use a minified version and gzip it

Credits

Respect & awards go to everybody who has contributed in some way so far:

	Brett Zamir (link) for contributing to:
	array_diff, array_diff_assoc, array_diff_key, array_diff_uassoc, array_diff_ukey, array_fill_keys, array_fill_keys, array_filter, array_intersect, array_intersect_assoc, array_intersect_key, array_intersect_uassoc, array_intersect_ukey, array_keys, array_map, array_merge, array_merge_recursive, array_pop, array_search, array_slice, array_slice, array_splice, array_udiff, array_udiff_assoc, array_udiff_uassoc, array_uintersect, array_uintersect_assoc, array_uintersect_uassoc, array_unique, arsort, arsort, asort, asort, compact, current, each, end, extract, key, krsort, ksort, natcasesort, natcasesort, natsort, natsort, next, pos, prev, reset, rsort, rsort, shuffle, sort, sort, uasort, uasort, uksort, usort, classkit_import, classkit_method_add, classkit_method_copy, classkit_method_redefine, classkit_method_remove, classkit_method_rename, class_exists, get_class_methods, get_class_vars, get_declared_classes, get_object_vars, method_exists, property_exists, ctype_alnum, ctype_alpha, ctype_cntrl, ctype_digit, ctype_graph, ctype_lower, ctype_print, ctype_punct, ctype_space, ctype_upper, ctype_xdigit, date, date, date, date, date_default_timezone_get, date_default_timezone_set, date_parse, gettimeofday, gmdate, gmmktime, gmstrftime, idate, localtime, mktime, strftime, strtotime, timezone_abbreviations_list, timezone_identifiers_list, restore_exception_handler, set_exception_handler, fclose, feof, fgetc, fgetcsv, fgets, fgetss, filemtime, fopen, fpassthru, fread, fseek, ftell, pathinfo, pclose, popen, readfile, rewind, call_user_func, call_user_func_array, create_function, func_get_arg, func_get_args, func_num_args, get_defined_functions, get_defined_functions, register_shutdown_function, assert, assert_options, get_cfg_var, get_defined_constants, get_required_files, getenv, getlastmod, ini_alter, ini_get, ini_get_all, ini_restore, ini_set, php_ini_loaded_file, php_ini_scanned_files, phpversion, putenv, set_time_limit, include, include_once, require, require_once, atan2, expm1, fmod, log1p, rand, constant, define, defined, die, exit, exit, php_strip_whitespace, sleep, time_nanosleep, time_sleep_until, usleep, gopher_parsedir, setrawcookie, aggregate, aggregate_info, aggregate_methods, aggregate_methods_by_list, aggregate_methods_by_regexp, aggregate_properties, aggregate_properties_by_list, aggregate_properties_by_regexp, aggregation_info, deaggregate, preg_grep, sql_regcase, runkit_class_adopt, runkit_class_emancipate, runkit_function_add, runkit_function_copy, runkit_function_redefine, runkit_function_remove, runkit_function_rename, runkit_import, runkit_method_add, runkit_method_copy, runkit_method_redefine, runkit_method_remove, runkit_method_rename, runkit_superglobals, chunk_split, convert_uuencode, count_chars, echo, get_html_translation_table, lcfirst, levenshtein, localeconv, md5, md5_file, nl2br, nl_langinfo, parse_str, printf, quoted_printable_decode, quoted_printable_decode, quoted_printable_encode, setlocale, sha1, soundex, sprintf, str_getcsv, str_ireplace, str_replace, str_replace, str_shuffle, str_split, str_word_count, strcoll, strcspn, strip_tags, strlen, strnatcasecmp, strncmp, strrchr, strspn, strtok, strtr, substr_compare, substr_replace, ucfirst, vprintf, base64_decode, get_headers, get_meta_tags, parse_url, rawurldecode, rawurldecode, rawurlencode, rawurlencode, rawurlencode, urldecode, urldecode, urlencode, urlencode, doubleval, get_defined_vars, get_resource_type, gettype, import_request_variables, import_request_variables, is_array, is_array, is_binary, is_buffer, is_callable, is_real, is_resource, is_unicode, print_r, print_r, settype, strval, strval, unserialize, var_dump, var_export, utf8_decode
	Onno Marsman for contributing to:
	acos, acosh, asin, asinh, atan, atanh, ceil, cos, cosh, decbin, dechex, decoct, exp, floor, fmod, getrandmax, hypot, is_finite, is_infinite, is_nan, lcg_value, log, log10, max, max, min, min, mt_getrandmax, mt_rand, pi, pow, rand, round, sin, sinh, sqrt, tan, tanh, setcookie, preg_quote, addslashes, bin2hex, count_chars, html_entity_decode, htmlentities, htmlspecialchars_decode, levenshtein, ltrim, nl2br, nl2br, ord, parse_str, rtrim, soundex, str_ireplace, str_replace, str_replace, str_rot13, str_split, strcasecmp, strip_tags, stripos, stripslashes, stristr, strlen, strnatcmp, strncasecmp, strpbrk, strpos, strrev, strripos, strrpos, strstr, strtolower, strtoupper, substr, substr_count, trim, ucfirst, ucwords, base64_decode, empty, empty, is_array, is_bool, isset, utf8_decode, utf8_encode, utf8_encode
	Michael White (link) for contributing to:
	array_count_values, get_included_files, include, include_once, require, require_once, md5, number_format, parse_str, printf, sha1, sprintf, str_pad, strnatcmp, vprintf, http_build_query, floatval, is_object, print_r
	Waldo Malqui Silva for contributing to:
	array_fill, array_pad, array_product, array_rand, compact, count, range, abs, defined, ip2long, long2ip, implode, strcmp, strncmp, ucwords, settype
	Paulo Ricardo F. Santos for contributing to:
	getdate, microtime, constant, define, chop, chunk_split, quotemeta, sprintf, get_headers, gettype, is_double, is_float, is_integer, is_long, is_scalar
	Jack for contributing to:
	compact, max, min, count_chars, htmlentities, md5, parse_str, soundex, sprintf, str_ireplace, strnatcmp, trim, utf8_encode
	Jonas Raoni Soares Silva (link) for contributing to:
	shuffle, abs, setcookie, number_format, number_format, soundex, str_repeat, str_replace, str_rot13, ucwords, wordwrap, wordwrap
	Philip Peterson for contributing to:
	sizeof, log10, round, exit, echo, get_html_translation_table, nl2br, str_replace, strchr, urldecode, urlencode, var_export
	Ates Goral (link) for contributing to:
	array_change_key_case, array_count_values, array_diff_key, each, get_class, preg_quote, addslashes, count_chars, str_rot13, stripslashes
	Legaev Andrey for contributing to:
	end, reset, file, file_get_contents, function_exists, include, include_once, http_build_query, is_array, is_object
	Martijn Wieringa for contributing to:
	array_shift, array_unshift, str_ireplace, str_split, strcasecmp, stripos, strnatcmp, substr
	Nate for contributing to:
	array_merge, array_sum, array_unique, pathinfo, addslashes, echo, strncasecmp
	Enrique Gonzalez for contributing to:
	file_exists, filesize, decbin, decoct, deg2rad, rad2deg
	Philippe Baumann for contributing to:
	base_convert, bindec, dechex, hexdec, octdec, empty
	Theriault for contributing to:
	array_multisort, quoted_printable_decode, quoted_printable_decode, quoted_printable_encode, quoted_printable_encode
	Webtoolkit.info (link) for contributing to:
	crc32, md5, sha1, utf8_decode, utf8_encode
	Ash Searle (link) for contributing to:
	basename, printf, sprintf, vprintf
	Carlos R. L. Rodrigues (link) for contributing to:
	array_chunk, array_unique, date, levenshtein
	Jani Hartikainen for contributing to:
	file, file_exists, file_get_contents, filesize
	Ole Vrijenhoek for contributing to:
	convert_uuencode, convert_uuencode, quoted_printable_decode, str_word_count
	travc for contributing to:
	rawurldecode, rawurlencode, urldecode, urlencode
	Alex for contributing to:
	get_html_translation_table, strip_tags, is_int
	Andrea Giammarchi (link) for contributing to:
	array_map, define, levenshtein
	Erkekjetter for contributing to:
	ltrim, rtrim, trim
	GeekFG (link) for contributing to:
	krsort, ksort, time
	Johnny Mast (link) for contributing to:
	array_walk, array_walk_recursive, create_function
	Michael Grier for contributing to:
	array_unique, wordwrap, rawurlencode
	d3x for contributing to:
	array, explode, unserialize
	marrtins for contributing to:
	array_change_key_case, addslashes, stripslashes
	stag019 for contributing to:
	parse_str, parse_str, http_build_query
	AJ for contributing to:
	urldecode, urlencode
	Alfonso Jimenez (link) for contributing to:
	array_reduce, strpbrk
	Aman Gupta for contributing to:
	base64_decode, utf8_decode
	Arpad Ray (mailto:arpad@php.net) for contributing to:
	serialize, unserialize
	Breaking Par Consulting Inc (link) for contributing to:
	gettimeofday, localtime
	Caio Ariede (link) for contributing to:
	strtotime, strtotime
	David for contributing to:
	strtotime, is_numeric
	Josh Fraser (link) for contributing to:
	gettimeofday, localtime
	KELAN for contributing to:
	get_html_translation_table, gettype
	Karol Kowalski for contributing to:
	array_reverse, abs
	Lars Fischer for contributing to:
	urldecode, urlencode
	Marc Palau for contributing to:
	mktime, strip_tags
	Mirek Slugen for contributing to:
	htmlspecialchars, htmlspecialchars_decode
	Oleg Eremeev for contributing to:
	str_replace, str_replace
	Pellentesque Malesuada for contributing to:
	base64_decode, base64_encode
	Public Domain (link) for contributing to:
	json_decode, json_encode
	Sakimori for contributing to:
	strlen, wordwrap
	Steve Hilder for contributing to:
	strcmp, strncmp
	Steven Levithan (link) for contributing to:
	trim, parse_url
	Thunder.m for contributing to:
	base64_decode, base64_encode
	Tyler Akins (link) for contributing to:
	base64_decode, base64_encode
	gettimeofday for contributing to:
	date, idate
	gorthaur for contributing to:
	strcmp, strncmp
	mdsjack (link) for contributing to:
	include, trim
	0m3r for contributing to:
	array_diff_assoc
	Alexander Ermolaev (link) for contributing to:
	trim
	Allan Jensen (link) for contributing to:
	number_format
	Andreas for contributing to:
	setcookie
	Andrej Pavlovic for contributing to:
	serialize
	Anton Ongson for contributing to:
	str_replace
	Arno for contributing to:
	htmlspecialchars
	Atli Þór for contributing to:
	nl2br
	Bayron Guevara for contributing to:
	base64_encode
	Ben Bryan for contributing to:
	print_r
	Benjamin Lupton for contributing to:
	number_format
	Blues (link) for contributing to:
	strftime
	Blues at link for contributing to:
	setlocale
	Bobby Drake for contributing to:
	strip_tags
	Brad Touesnard for contributing to:
	date
	Bryan Elliott for contributing to:
	date
	Cagri Ekin for contributing to:
	parse_str
	ChaosNo1 for contributing to:
	timezone_abbreviations_list
	Christian Doebler for contributing to:
	sleep
	Cord for contributing to:
	is_array
	Daniel Esteban for contributing to:
	strpos
	David James for contributing to:
	get_class
	David Randall for contributing to:
	date
	Der Simon (link) for contributing to:
	echo
	Dino for contributing to:
	serialize
	Diogo Resende for contributing to:
	number_format
	Douglas Crockford (link) for contributing to:
	gettype
	DxGx for contributing to:
	trim
	Eric Nagel for contributing to:
	strip_tags
	Eugene Bulkin (link) for contributing to:
	echo
	FGFEmperor for contributing to:
	mktime
	Felix Geisendoerfer (link) for contributing to:
	array_key_exists
	Francesco for contributing to:
	empty
	Francois for contributing to:
	htmlspecialchars_decode
	FremyCompany for contributing to:
	isset
	Gabriel Paderni for contributing to:
	str_replace
	Garagoth for contributing to:
	serialize
	Gilbert for contributing to:
	array_sum
	Howard Yeend for contributing to:
	number_format
	Hyam Singer (link) for contributing to:
	exit
	J A R for contributing to:
	end
	Jalal Berrami for contributing to:
	import_request_variables
	Kirk Strobeck for contributing to:
	strlen
	Kristof Coomans (SCK-CEN (Belgian Nucleair Research Centre)) for contributing to:
	strnatcasecmp
	LH for contributing to:
	empty
	Leslie Hoare for contributing to:
	rand
	Lincoln Ramsay for contributing to:
	basename
	Linuxworld for contributing to:
	bin2hex
	Luke Godfrey for contributing to:
	strip_tags
	Luke Smith (link) for contributing to:
	number_format
	Manish for contributing to:
	is_array
	Marc Jansen for contributing to:
	empty
	Marco for contributing to:
	get_html_translation_table
	Martin Pool for contributing to:
	strnatcasecmp
	Mateusz "loonquawl" Zalega for contributing to:
	htmlspecialchars_decode
	Matt Bradley for contributing to:
	is_int
	MeEtc (link) for contributing to:
	date
	Mick@el for contributing to:
	stripslashes
	Nathan for contributing to:
	htmlspecialchars
	Nick Callen for contributing to:
	wordwrap
	Norman "zEh" Fuchs for contributing to:
	utf8_decode
	Ole Vrijenhoek (link) for contributing to:
	filemtime
	Ozh for contributing to:
	dirname
	Paul for contributing to:
	exit
	Pedro Tainha (link) for contributing to:
	unserialize
	Peter-Paul Koch (link) for contributing to:
	date
	Pierre-Luc Paour for contributing to:
	strnatcasecmp
	Pul for contributing to:
	strip_tags
	Pyerre for contributing to:
	checkdate
	ReverseSyntax for contributing to:
	htmlspecialchars_decode
	Rival for contributing to:
	number_format
	Robin for contributing to:
	is_nan
	Sanjoy Roy for contributing to:
	array_diff
	Saulo Vallory for contributing to:
	strncasecmp
	Scott Cariss for contributing to:
	htmlspecialchars_decode
	Simon Willison (link) for contributing to:
	str_replace
	Slawomir Kaniecki for contributing to:
	htmlspecialchars_decode
	Soren Hansen for contributing to:
	count
	Steve Clay for contributing to:
	function_exists
	Subhasis Deb for contributing to:
	array_merge_recursive
	T. Wild for contributing to:
	filesize
	T.Wild for contributing to:
	substr
	T0bsn for contributing to:
	crc32
	Thiago Mata (link) for contributing to:
	call_user_func_array
	Tim Wiel for contributing to:
	date
	Tim de Koning for contributing to:
	is_numeric
	Tod Gentille for contributing to:
	log10
	Valentina De Rosa for contributing to:
	strspn
	Victor for contributing to:
	ip2long
	Wagner B. Soares for contributing to:
	strtotime
	XoraX (link) for contributing to:
	dirname
	YUI Library: link for contributing to:
	setlocale
	Yannoo for contributing to:
	mktime
	Yves Sucaet for contributing to:
	utf8_encode
	baris ozdil for contributing to:
	mktime
	booeyOH for contributing to:
	preg_quote
	class_exists for contributing to:
	get_declared_classes
	date for contributing to:
	idate
	djmix for contributing to:
	basename
	dptr1988 for contributing to:
	unserialize
	duncan for contributing to:
	array_unique
	echo is bad for contributing to:
	echo
	ejsanders for contributing to:
	vsprintf
	gabriel paderni for contributing to:
	mktime
	ger for contributing to:
	html_entity_decode
	hitwork for contributing to:
	utf8_decode
	jakes for contributing to:
	mktime
	john (link) for contributing to:
	html_entity_decode
	johnrembo for contributing to:
	var_export
	kenneth for contributing to:
	explode
	madipta for contributing to:
	get_html_translation_table
	marc andreu for contributing to:
	html_entity_decode
	metjay for contributing to:
	time
	mk.keck for contributing to:
	realpath
	mktime for contributing to:
	gmmktime
	nobbler for contributing to:
	htmlentities
	noname for contributing to:
	get_html_translation_table
	penutbutterjelly for contributing to:
	str_ireplace
	rezna for contributing to:
	stripslashes
	sankai for contributing to:
	array_count_values
	setcookie for contributing to:
	setrawcookie
	sowberry for contributing to:
	utf8_encode
	stensi for contributing to:
	intval
	strcasecmp, strcmp for contributing to:
	substr_compare
	taith for contributing to:
	is_numeric
	uestla for contributing to:
	strtr

Your name here?

Contributing is as easy as adding a comment with better code, or code for a new function.
Any contribution leading to improvement will directly get your name & link here.

Coming Project features

Project features that we are currently working on:

• Done - Site. A place for php.js of it's own. See: phpjs.org.
• Done - Compile. Compile your own php.js version, with only the functions you need. Should generate a hash with which you can retrieve latest versions of your php.js combination.
Done - Testsuite. A better test-suite that can be ran locally so developers can easily test before commiting. Also the testing itself should be more thorough.
• Done - Versioning. Individual functions are versioned, but the entire library should be versioned as well.

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