(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 => $val ) { Paul Hirsch ¶ 7 years ago
Md. Abutaleb ¶ 2 years ago
0] => first_index el dot quick at gmail dot com ¶ 10 years ago
jochem ¶ 16 years ago
rodrigo at NOSPAM dot dhweb dot com dot br ¶ 19 years ago
"<table width='100%' border='1' bordercolor='#6699CC' cellspacing='0' cellpadding='5'><tr valign='top'>";
ferrerna at gmail dot com ¶ 13 years ago
= db_query('SELECT name, value FROM properties');$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
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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++){ How do you remove a key from an associative array?Given an associative array containing array elements and the task is to remove a key and its value from the associative array. Method 1: Using unset() function: The unset() function is used to unset a key and its value in an associative array. print_r( $arr );
How do you change the key in an associative array?Just make a note of the old value, use unset to remove it from the array then add it with the new key and the old value pair. Show activity on this post. Renaming the key AND keeping the ordering consistent (the later was important for the use case that the following code was written).
What is key in associative array in PHP?Associative arrays are arrays that use named keys that you assign to them.
What is Array_keys () used for in PHP?The array_keys() function returns an array containing the keys.
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