array_keys( ) returns an array of all the keys in that array : array_keys « Data Structure « PHP

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PHP » Data Structure » array_keys

array_keys( ) returns an array of all the keys in that array

 

array array_keys ( array arr [, mixed search [, bool strict]] )

<?

    $users[923] = 'T';

    $users[100] = 'S';

    $users[1202] = 'C';

    $userids = array_keys($users);





    $users[923] = 'T';

    $users[100] = 'S';

    $users[1202] = 'C';

    $userids = array_keys($users, "T");

?>

Related examples in the same category

1.	Outputting Using array_values() and array_keys() for Backward Compatibility
2.	Return all the keys of an array with array array_keys (array input [, mixed search_value])
3.	array_keys() function returns an array containing all keys

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