key
Fetch a key from an associative array
Description
mixedkey
array&array
key returns the index element of the
current array position.
<function>key</function> example
'apple',
'fruit2' => 'orange',
'fruit3' => 'grape',
'fruit4' => 'apple',
'fruit5' => 'apple');
// this cycle echoes all associative array
// key where value equals "apple"
while ($fruit_name = current($array)) {
if ($fruit_name == 'apple') {
echo key($array).'
';
}
next($array);
}
?>
]]>
See also current and next.