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Title: PHP: array_key_exists - Manual

X Title: PHP: array_key_exists - Manual

Open Graph Description: Checks if the given key or index exists in the array

X Description: Checks if the given key or index exists in the array

X: @official_php

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Domain: www.php.net

DescriptionChecks if the given key or index exists in the array
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truehttps://www.php.net/reserved.constants.php#constant.true
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nullhttps://www.php.net/language.types.null.php
resourcehttps://www.php.net/language.types.resource.php
stringhttps://www.php.net/language.types.string.php
objecthttps://www.php.net/language.types.object.php
objecthttps://www.php.net/language.types.object.php
property_exists()https://www.php.net/function.property-exists.php
isset()https://www.php.net/function.isset.php
isset()https://www.php.net/function.isset.php
truehttps://www.php.net/reserved.constants.php#constant.true
nullhttps://www.php.net/reserved.constants.php#constant.null
isset()https://www.php.net/function.isset.php
array_keys()https://www.php.net/function.array-keys.php
in_array()https://www.php.net/function.in-array.php
property_exists()https://www.php.net/function.property-exists.php
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＋add a notehttps://www.php.net/manual/add-note.php?sect=function.array-key-exists&repo=en&redirect=https://www.php.net/manual/en/function.array-key-exists.php
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Array Functionshttps://www.php.net/ref.array.php
arrayhttps://www.php.net/function.array.php
array_​allhttps://www.php.net/function.array-all.php
array_​anyhttps://www.php.net/function.array-any.php
array_​change_​key_​casehttps://www.php.net/function.array-change-key-case.php
array_​chunkhttps://www.php.net/function.array-chunk.php
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array_​diffhttps://www.php.net/function.array-diff.php
array_​diff_​assochttps://www.php.net/function.array-diff-assoc.php
array_​diff_​keyhttps://www.php.net/function.array-diff-key.php
array_​diff_​uassochttps://www.php.net/function.array-diff-uassoc.php
array_​diff_​ukeyhttps://www.php.net/function.array-diff-ukey.php
array_​fillhttps://www.php.net/function.array-fill.php
array_​fill_​keyshttps://www.php.net/function.array-fill-keys.php
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array_​find_​keyhttps://www.php.net/function.array-find-key.php
array_​firsthttps://www.php.net/function.array-first.php
array_​fliphttps://www.php.net/function.array-flip.php
array_​intersecthttps://www.php.net/function.array-intersect.php
array_​intersect_​assochttps://www.php.net/function.array-intersect-assoc.php
array_​intersect_​keyhttps://www.php.net/function.array-intersect-key.php
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array_​intersect_​ukeyhttps://www.php.net/function.array-intersect-ukey.php
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array_​key_​firsthttps://www.php.net/function.array-key-first.php
array_​key_​lasthttps://www.php.net/function.array-key-last.php
array_​keyshttps://www.php.net/function.array-keys.php
array_​lasthttps://www.php.net/function.array-last.php
array_​maphttps://www.php.net/function.array-map.php
array_​mergehttps://www.php.net/function.array-merge.php
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array_​reducehttps://www.php.net/function.array-reduce.php
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array_​searchhttps://www.php.net/function.array-search.php
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array_​sumhttps://www.php.net/function.array-sum.php
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array_​udiff_​uassochttps://www.php.net/function.array-udiff-uassoc.php
array_​uintersecthttps://www.php.net/function.array-uintersect.php
array_​uintersect_​assochttps://www.php.net/function.array-uintersect-assoc.php
array_​uintersect_​uassochttps://www.php.net/function.array-uintersect-uassoc.php
array_​uniquehttps://www.php.net/function.array-unique.php
array_​unshifthttps://www.php.net/function.array-unshift.php
array_​valueshttps://www.php.net/function.array-values.php
array_​walkhttps://www.php.net/function.array-walk.php
array_​walk_​recursivehttps://www.php.net/function.array-walk-recursive.php
arsorthttps://www.php.net/function.arsort.php
asorthttps://www.php.net/function.asort.php
compacthttps://www.php.net/function.compact.php
counthttps://www.php.net/function.count.php
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endhttps://www.php.net/function.end.php
extracthttps://www.php.net/function.extract.php
in_​arrayhttps://www.php.net/function.in-array.php
keyhttps://www.php.net/function.key.php
key_​existshttps://www.php.net/function.key-exists.php
krsorthttps://www.php.net/function.krsort.php
ksorthttps://www.php.net/function.ksort.php
listhttps://www.php.net/function.list.php
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nexthttps://www.php.net/function.next.php
poshttps://www.php.net/function.pos.php
prevhttps://www.php.net/function.prev.php
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resethttps://www.php.net/function.reset.php
rsorthttps://www.php.net/function.rsort.php
shufflehttps://www.php.net/function.shuffle.php
sizeofhttps://www.php.net/function.sizeof.php
sorthttps://www.php.net/function.sort.php
uasorthttps://www.php.net/function.uasort.php
uksorthttps://www.php.net/function.uksort.php
usorthttps://www.php.net/function.usort.php
eachhttps://www.php.net/function.each.php
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