print_r of json_decode is blank - php

Question

I have a file data.json that looks like
{
"18.01": [{
"name": "Title 1",
"id": "0",
"content": {
"html": "This should be 18.01 video 1",
"link": "https://www.youtube.com/embed/Dkm8Hteeh6M"
},
}, {
"name": "test_video_2",
"id": "1",
"content": {
"html": "This should be 18.01 video 2",
"link": "https://www.youtube.com/embed/KWafZrA5OBc"
},
}],
"18.02": [{
"name": "test_video_3",
"id": "0",
"content": {
"html": "This should be 18.02 video 3",
"link": "https://www.youtube.com/embed/EMELKZhM2-g"
},
}, {
"name": "test_video_4",
"id": "1",
"content": {
"html": "This should be 18.02 video 4",
"link": "https://www.youtube.com/embed/TkWmK-cplV4"
},
}]
}
Then I have a php file in the same folder that looks like:
<?php
//Decode JSON
$json_data = json_decode(file_get_contents('data.json'), TRUE);
//Print data
print_r($json_data);
?>
But when I load this php file in my browser I get a blank page. My php service is running (other php works fine), and if I print just the file that I'm loading that displays fine as a string.
Edit: If you're getting this error remember to validate your JSON unlike me...

Answer 1

The above JSON is syntactically wrong. The valid JSON is :
{
"18.01": [
{
"name": "Title 1",
"id": "0",
"content": {
"html": "This should be 18.01 video 1",
"link": "https://www.youtube.com/embed/Dkm8Hteeh6M"
}
},
{
"name": "test_video_2",
"id": "1",
"content": {
"html": "This should be 18.01 video 2",
"link": "https://www.youtube.com/embed/KWafZrA5OBc"
}
}
],
"18.02": [
{
"name": "test_video_3",
"id": "0",
"content": {
"html": "This should be 18.02 video 3",
"link": "https://www.youtube.com/embed/EMELKZhM2-g"
}
},
{
"name": "test_video_4",
"id": "1",
"content": {
"html": "This should be 18.02 video 4",
"link": "https://www.youtube.com/embed/TkWmK-cplV4"
}
}
]
}
Trailing commas are not allowed in a JSON, like at line 8 in the JSON string mentioned with the question
Furthermore, to validate JSON, you could use this nice website