Q:

How to find unknown character in mysql or in array

First I created database with utf8mb4_general_ci collation and created table with same collation. Then I import csv file with  
load data local infile '/mnt/c/Users/justi/Desktop/enml/enml.csv' 
into table dict 
CHARACTER SET utf8mb4
fields terminated by '\t' 
IGNORE 1 ROWS;

Sample data  

+--------+----------------+----------------+---------------------------------+
| # id   | english_word   | part_of_speech | malayalam_definition            |
+--------+----------------+----------------+---------------------------------+
| 174569 | .net           | n              | പുത്തന്‍ കമ്പ്യൂട്ടര്‍ സാങ്കേതികത ഭാഷ      |
+--------+----------------+----------------+---------------------------------+
| 116102 | A bad patch    | n              | കുഴപ്പം പിടിച്ച സമയം               |
+--------+----------------+----------------+---------------------------------+
| 219752 | a bag of bones | phr            | വളരെയതികം മെലിഞ്ഞ വ്യക്തി അഥവാ മൃഗം |
+--------+----------------+----------------+---------------------------------+

I check with
SELECT malayalam_definition from dict;
then var_dump($row); gives 
array(1) { ["malayalam_definition"]=> string(19) "ശരശയ്യ " }  
 array(1) { ["malayalam_definition"]=> string(22) "പൂമെത്ത " }  
 array(1) { ["malayalam_definition"]=> string(41) "സുഖകരമായ അവസ്ഥ " }   
  array(1) { ["malayalam_definition"]=> string(44) "അസുഖകരമായ അവസ്ഥ " }   
  array(1) { ["malayalam_definition"]=> string(22) "പൂമെത്ത " } 
  array(1) { ["malayalam_definition"]=> string(123) "സുഖകരമെങ്കിലും സ്വാതന്ത്യ്രമില്ലാത്ത അവസ്ഥ " }
...

You can find an unknown character after each word like "ശരശയ്യ ". 
I tried select trim(malayalam_definition) from dict but gives same result. how to find out that character after each words?

A:

Converting the string to hex is one way:
SELECT HEX(malayalam_definition),CONCAT("{",malayalam_definition,"}")
FROM dict
WHERE id=116102

