(PHP 5 >= 5.2.0)
array_fill_keys — Fill an array with values, specifying keys
Fills an array with the value of the value parameter, using the values of the keys array as keys.
Array of values that will be used as keys
Either an string or an array of values
Returns the filled array
Example#1 array_fill_keys() example
<?php
$keys = array('foo', 5, 10, 'bar');
$a = array_fill_keys($keys, 'banana');
print_r($a);
?>
上例将输出：
Array ( [foo] => banana [5] => banana [10] => banana [bar] => banana )