Это работает и было проверено:
$a = Array(
"msg" => Array
(
0 => Array
(
"alertId" => 2416,
"alerttitle" => "Raven Lexy",
"alertImageUrl" => "photos/81951b37ad01c4aa65662956f178214eth.jpeg",
"alertDescription" => "(1) New Message(s)",
"alertType" => "New Message",
"Date" => 1304679217,
"count" => 1
)
),
"rehp" => Array
(
0 => Array
(
"alertId" => 48,
"alerttitle" => "Artin",
"alertImageUrl" => "photos/95eaf8416ee68981ab944465bcdd7bffth.jpeg",
"alertDescription" => "Reply From Artin",
"alertType" => "Reply To Hotpress",
"count" => 1,
"id" => 48
),
1 => Array
(
"alertId" => 48,
"alerttitle" => "Artin",
"alertImageUrl" => "photos/95eaf8416ee68981ab944465bcdd7bffth.jpeg",
"alertDescription" => "Reply From Artin",
"alertType" => "Reply To Hotpress",
"count" => 1,
"id" => 48,
)
)
);
$b = array();
foreach ($a as $v)
{
foreach ($v as $i)
$b[] = $i;
}
print_r($b);