php array_diff not working on this compare - php

Question

I have two arrays:
(
[lineCode] => C
[serviceRequest] => Ext, Warr auth.#19091100102 for $650.64 to be paid by c/card(fax#[phone]). Cust owes balance
[skillCode] => 90SB
[opCode] => 90SB
[jobType] => CUSTOMER
[techNo] =>
[lineStatus] => C
)
(
[id] => 755350
[rid] => 252178
[lineCode] => C
[serviceRequest] => Ext, Warr auth.#19091100102 for $650.64 to be paid by c/card(fax#[phone]). Cust owes balance
[skillCode] => 90SB
[opCode] => 90SB
[jobType] => CUSTOMER
[techNo] =>
[lineStatus] => W
[timeA] => 1575497139
[timeC] => 0
)
When i perform $diff = array_diff($arry1, $arry2);, it does not find the lineStatus to be different. Could it be because of service Request line with special characters? Although as a test, I set both lines to blanks, and it still did not see the difference.
Any help would be great. Stumped for the day.
UPDATE w/ MORE INFO
As this is part of a larger loop through mulitple arrays, the diff check before this one above is below:
$arry1= Array
(
[lineCode] => B
[serviceRequest] =>
[skillCode] => 15
[opCode] => 15
[jobType] => CUSTOMER
[techNo] => A05
[lineStatus] => C
)
$arry2= Array
(
[id] => 755362
[rid] => 252184
[lineCode] => B
[serviceRequest] =>
[skillCode] => 15
[opCode] => 15
[jobType] => CUSTOMER
[techNo] => A05
[lineStatus] => W
[timeA] => 1575504138
[timeC] => 0
)
$diff= Array
(
[lineStatus] => C
)
the code for the diff is $diff=array_diff($arry1,$arry2);
If it works correctly for this one, why would it not for the next.

Answer 1

Why does it not find it the way you originally did it...?
array_diff() does not care about key-value combinations, it only compares the values in the different arrays that are compared.
To better understand what's happening: if in your updated data you introduce an array element [dummy] => "C" into $arry2 you will no longer get [lineStatus] => "C" returned into $diff. As the value C is now found in both $arry1 and $arry2.
Have a look at this demo