PHP probletm with appending new property into object? - php

Question

I am starting to learn php for interaction with mysql db.
I have to fetch data from two unrelated tables and form an array of stdClass objects then dump it as json array.
I have so far managed to fetch data from table1 and added some columns from it into an
myobjects[], as follows..
Here $array is an array of primary keys , also i pass a reference to myobjects array
function load_from_table1($array , &$myobjects)
{
foreach($array as $num)
{
$obj=(object)null;
$obj->prop1 = $num;
$sql="SELECT * FROM `table1` WHERE col1=".$num;
$result = mysqli_query($con, $sql);
if($result!=null)
{
$row = mysqli_fetch_assoc($result);
//inserting data into object
$obj->prop2 = $row['col2'];
$obj->prop3 = $row['col3'];
$obj->prop4 = $row['col4'];
}
$myobjects[]=$obj;
}
}
It is fine so far now i need add two more properties to all items in myobjects array obtained from table2.
function load_from_table2(&$data)
{
for($i=0;$i<sizeof($data);$i++)
{
$obj=(object)$data[$i];
$id=$obj->prop1;
$sql="SELECT * FROM `table2` WHERE col1=".$id;
$result = mysqli_query($con, $sql);
if($result!=null)
{
$row = mysqli_fetch_assoc($result);
//$temp=$row['name'];
//echo $temp;
//$obj->name = "test1";
$obj->name = $row['name'];
//$temp=$row['description'];
//echo $temp;
//$obj->description = "test2";
$obj->description = $row['description'];
}
}
When i dump myobjects as json there is no output. But $temp echos properly , also when i us direct values every thing seems to work fine.
Can some one help me with this, also an explanation on what i am doing wrong would be greatly appreciated. Thank You.
Some Details on the working Environment , Because of the answer i provided ,
I am using wampserver 2.5 64 bit , and for now executing the php file off firefox browser.
The situation is quiet confusing as i can read the value and print it or save to variable , but not save it as object property.

Answer 1

I got it to work, But the problem was not with the code. It seems that the column in the table that i was reading has collation set to ' utf8_general_ci ' not sure what that means. But when i removed that setting , it all worked as expected. But i feel the collation is not the actual underlying reason. So i will keep this question open in hopes some might provide an explanation.
It seems i was looking for the wrong issues. Reading up on collation i found that some character sets are not supported fully , so i tried to echo the contents of the object array instead of json_encode and found it printed.
searching to that end i found another qst here on stackoverflow that solved my problem.
Simply added this line :: mysqli_set_charset($con,'utf8'); before i started any queries on that table and json_encode started working.