php基本函数汇总

$arr = array(
   "1011,1003,1008,1001,1000,1004,1012",
   "1009",
   "1011,1003,1111"
  );
$result = array();
foreach ($arr as $str) {
 $str_arr = explode(",", $str);
 foreach ($str_arr as $v) {
  // $result[$v] = isset($result[$v]) ? $result[$v] : 0;
  // $result[$v] = $result[$v] + 1;
  $result[$v] = isset($result[$v]) ? $result[$v]+1 : 1;
 }
}
print_r($result);
//Array
(
[1011] => 2
[1003] => 2
[1008] => 1
[1001] => 1
[1000] => 1
[1004] => 1
[1012] => 1
[1009] => 1
[1111] => 1
)

$arr = arra