What is array_keys () used for in php?
(PHP 4, PHP 5, PHP 7, PHP 8) Show array_keys — Return all the keys or a subset of the keys of an array Descriptionarray_keys(array array_keys(array If a Parametersarray An array containing keys to return. search_value If specified, then only keys containing this value are returned. strict Determines if strict comparison (===) should be used during the search. Return Values Returns an array of all the keys in ExamplesExample #1 array_keys() example
The above example will output: Array ( [0] => 0 [1] => color ) Array ( [0] => 0 [1] => 3 [2] => 4 ) Array ( [0] => color [1] => size ) See Also
pat dot leblanc at gmail dot com ¶ 11 years ago
= array('329462291595' =>null, 'ZZ291595' => null); Sven (bitcetera.com) ¶ 16 years ago
phpnet at holodyn dot com ¶ 8 years ago
Ian (maxianos at hotmail dot com) ¶ 8 years ago
$arrayKeys; zammit dot andrew at gmail dot com ¶ 8 years ago
= array(); Robert C. ¶ 6 years ago
$array as $key => $val ) { Paul Hirsch ¶ 7 years ago
Md. Abutaleb ¶ 2 years ago
0] => first_index el dot quick at gmail dot com ¶ 10 years ago
jochem ¶ 16 years ago
rodrigo at NOSPAM dot dhweb dot com dot br ¶ 19 years ago
" ferrerna at gmail dot com ¶ 13 years ago
= db_query('SELECT name, value FROM properties');$result = db_returnAll($query);/* This will return an array like so: izzecold at live dot de ¶ 10 years ago
function mKeyChecker($arr,$keys=array()) { Hayley Watson ¶ 14 years ago
vesely at tana dot it ¶ 16 years ago
ru dot dy at gmx dot net ¶ 17 years ago
sip at email dot ee ¶ 19 years ago
creator at mindcreations dot com ¶ 15 years ago
$ar as $k => $v) {
craig1231 at hotmail dot com ¶ 10 years ago
$keys as $k) webmaster [at] baz-x [dot] at ¶ 17 years ago
$array; glennh at webadept dot net ¶ 19 years ago
neil at 11 out of 10 ¶ 14 years ago
qeremy [atta] gmail [dotta] com ¶ 10 years ago
array_keys_prefix_multi($arr, $pref = "") { anthony at berglas dot org ¶ 10 years ago
Na'ven Enigma ¶ 10 years ago
nodarinodo at mail dot ru ¶ 13 years ago
$i =0; $i < count(array_keys($es, $ess)); $i++){ What is the use of array_keys in PHP?The array_keys() is a built-in function in PHP and is used to return either all the keys of and array or the subset of the keys.
What is array_keys?array_keys() returns the keys, numeric and string, from the array . If a search_value is specified, then only the keys for that value are returned. Otherwise, all the keys from the array are returned.
How are array_keys and Array_values functions useful?Array_keys() and array_values() are very closely related functions: the former returns an array of all the keys in an array, and the latter returns an array of all the values in an array.
How do you check if a key exists in an array PHP?The array_key_exists() is an inbuilt function of PHP that is used to check whether a specific key or index is present inside an array or not. The function returns true if the specified key is found in the array otherwise returns false.
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