用php中的另一个数组检查数组的单个元素

Question

I have two array name position and data respectively.

$position = array("A1","A2","A3","A4","A5","B1","B2","B3","B4","B5");
Array ( [0] => B1 [1] => B2 [2] => A2 [3] => A3 )

this second array named data which are coming from mysql database.Now i need to check the element of data array in position array.I tried this code

for ($i=0; $i < 10 ; $i++) { if ($i==5){?>
  <br> <?php } ?>
  <input type="checkbox" name="pos[]" value="<?php echo $position[$i];?>"
  <?php if(in_array($data[$i], $position)) echo "checked";
   ?>>
  <label ><?php echo $position[$i] ?></label>
<?php }

and i get the result is

A1 A2 A3 A4

Notice: Undefined offset: 4 in G:\xampp\htdocs\library\ajax.php on line 25 A5

Notice: Undefined offset: 5 in G:\xampp\htdocs\library\ajax.php on line 25 B1

Notice: Undefined offset: 6 in G:\xampp\htdocs\library\ajax.php on line 25 B2

Notice: Undefined offset: 7 in G:\xampp\htdocs\library\ajax.php on line 25 B3

Notice: Undefined offset: 8 in G:\xampp\htdocs\library\ajax.php on line 25 B4

Notice: Undefined offset: 9 in G:\xampp\htdocs\library\ajax.php on line 25 B5

Thanks in advance