Use PHP functions in JavaScript

JavaScript array_key_exists

Checks if the given key or index exists in the array

function array_key_exists ( key, search ) {
    // Checks if the given key or index exists in the array  
    // 
    // version: 1008.1718
    // discuss at: http://phpjs.org/functions/array_key_exists    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Felix Geisendoerfer (http://www.debuggable.com/felix)
    // *     example 1: array_key_exists('kevin', {'kevin': 'van Zonneveld'});
    // *     returns 1: true
    // input sanitation    if (!search || (search.constructor !== Array && search.constructor !== Object)){
        return false;
    }
 
    return key in search;}

external links: original PHP docs | raw js source

Examples

Running

1	array_key_exists('kevin', {'kevin': 'van Zonneveld'});

Should return

true

Dependencies

No dependencies, you can use this function standalone.

Open syntax issues

php.js uses JsLint to help us keep our code consistent and prevent some common bugs.

Eventually we want all code to pass or at least take into consideration most fixes suggested by JsLint, following this JsLint configuration we’ve decided on.

Authors

Thanks to the following developers, you get to have array_key_exists goodness in JavaScript.

Kevin van Zonneveld ( original )
Felix Geisendoerfer ( improved )

Comments

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More functions

In this category

array
array_change_key_case
array_chunk
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
natcasesort
natsort
next
pos
prev
range
reset
rsort
shuffle
sizeof
sort
uasort
uksort
usort

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