json_encode not working as expected using array source - php

Question

In my php I am reading a file and successfully getting each row into an array ($line[1] because its a 3 column CSV and I just need the 2nd value):
while (($line = fgetcsv($file, 1000)) !== false)
{
$course[] = array('course' => $line[1]);
}
$course[] correctly contains the array like:
0 =>
array (size=1)
'course' => string 'Course One' (length=68)
1 =>
array (size=1)
'course' => string 'Course Two' (length=45)
Problem is I cannot get the array to convert to json using json_encode
$json_res = json_encode($course);
EDIT: So just to be clear, I have array like this
2 =>
array (size=1)
'course' => string 'Associate Degree of Business Studies' (length=36)
3 =>
array (size=1)
'course' => string 'Associate Degree of Business Administration' (length=43)
$json_encode , gives me
boolean false

Answer 1

ok after taking in consideration all the information you provided, your original code should work. Try this out and let me know if it works.
$file = new SplFileObject("file.csv");
$file->setFlags(SplFileObject::READ_CSV);
$course = array();
foreach ($file as $row) {
$line = array('course' => $row[1]);
array_push($course, $line);
}
$json_res = json_encode($course);
var_dump($json_res);
Update: Try this code and let me know if it works:
$file = fopen('file.csv', 'r');
$course = array();
while (($data = fgetcsv($file, 1000, ",")) !== FALSE) {
$line = array('course' => utf8_decode($data[1]));
array_push($course, $line);
}
$json_res = json_encode($course);
var_dump($json_res)
;