如何获取另一个字符串数组中不存在的字符串数组的值？

Question

I have an array $myArray1 with some string values like 2 5 7 13 23 25. Another array $myArray2 has string values like 2 4 7 11 13 25.

My requirement is to get a third array $myArray3 having only those values of $myArray1 that are not present in $myArray2 i.e. 5 23.

I have tried $myArray3 = array_diff($myArray1, $myArray2) but then $myArray3[0] displays Undefined offset: 0.

Please tell me, is there any function of PHP for this?

Answer 1

array_diff doesn't reset keys, so you get Undefined offset: 0. If you want them to reset you need to use array_values.

$myArray3 = array_values(array_diff($myArray1, $myArray2));