Converting arrays to string in PHP -

i trying add values comes off database using method count; method works , using array give me proper count. trying add values code blocks coming up:

$value1 = mysqli_query($con,"select count(column) table"); $value1print = mysqli_fetch_array($value1); $value2=mysqli_query($con,"select count(column) table"); $value2print= mysqli_fetch_array($value2); 

i print value these arrays using code block:

echo $value1[0]; echo $value2[0]; 

now i'm trying add values value1 & value2 , i've tried following functions:

implode :

$arraytostring=implode($value1); 

this method returns data in manner: if value1 1, , value2 2, returns 11 , 22, when added, return 33. wrong because obviously, need 3.

serialize :

$arraytostring=serialized($value1); 

my count method returns number of rows or data database has, ie: 1 or 2.. etc. etc.; want values add up, ie: if value1 1 , value2 2, 1+2 , come result, in example, 3.

the below should work commented:

$totalofvalues = $value1[0] + $value2[0]; 

thanks