PHP/jquery autocomplete not loading JSON_ERROR_UTF8 - php

Question

I've got the following code which works only for 70 items. the moment I added the 71st item to the DB it fails to work.
$('document').ready(function() {
//autoComplete() returns a php array with all the products
<?php $productArray = autoComplete();?>
var js_products_array = <?php echo json_encode($productArray); ?>;
var result;
for(var i=0;i<js_products_array.length;i++){
result += js_products_array[i] + ', ';
}
//printing js_products_array
document.write(result);
$( "#autocompleteID" ).autocomplete({
source: js_products_array
});
...
I can see that js_products_array holds all the values but the autocomplete feature fails to work. The moment i remove the 71st item from the DB it works again.
I'm puzzled as to what's causing this. Would appreciate some help, cheers.

Answer 1

hmmm, try to use
json_last_error
var last_error = <?php echo json_last_error(); ?>;
http://php.net/manual/en/function.json-last-error.php
to check the problem
or
limit the number of records , it is easy to limit the number of records in database level
UPDATE
try
in your server function autoComplete() before returning the result to the view use this function to utf-8 encode the array
utf8_encode_deep($result_from_db);
function utf8_encode_deep(&$input) {
if (is_string($input)) {
$input = utf8_encode($input);
} else if (is_array($input)) {
foreach ($input as &$value) {
utf8_encode_deep($value);
}
unset($value);
} else if (is_object($input)) {
$vars = array_keys(get_object_vars($input));
foreach ($vars as $var) {
utf8_encode_deep($input->$var);
}
}
}
then you can use
json_encode($productArray);

Answer 2

The following piece of code fixed the problem: mysqli_set_charset($db, "utf8");