检查数组是否包含多个元素

Question

There is 4-5 different emails there appears several times in the array. I want to know how many times does 4 emails appears.

$member_sql = $this->EE->db->query("SELECT email FROM exp_members");

$member_result = $member_sql->result_array();
if(isset($member_result[0]))
{
$member_result = $member_result[0];

My error is in the if statement below. My if statement does not show anything. probably because it is incorrectly written. Can you guys help with this statement, what to write here.

if(count(array_keys($member_result, $member_result['email']))> 1)
{
echo "Do something";

}

Answer 1

为什么不去找mysql_num_rows呢？