How to extract Open Graph info from TXT file? - php

Question

I have a TXT file containing some facebook Open Graph info like this:
{
"data": [
{
"name": "Avatar",
"category": "Movie",
"id": "82771544063",
"created_time": "2012-04-13T21:16:56+0000"
},
{
"name": "HappyDance",
"category": "Movie",
"id": "243564344063",
"created_time": "2012-04-13T21:16:56+0000"
}
],
"paging": {
"next": "https://graph.facebook.com/me/likes?format=json&limit=5000&offset=5000&__after_id=5546653546361"
}
}
In PHP, I want to extract all the id numbers from the rows that show
"id": "XXXXXXXXXXXX",
The output should look like this:
I like 8277564344063
I like 243564344063
I started the following but I am getting an error:
<?php
$file_handle = fopen("raw.txt", "rb");
ob_start();
$text = file_get_contents('raw.txt');
$decode = json_decode($text);
print_r($decode);
$new_content = ob_get_clean();
file_put_contents("likes.txt", $new_content);
fclose($file_handle);
?>
The error is that my output is blank! What am I doing wrong?
Please help?

Answer 1

You don't have valid JSON.
The JSON Object below this line is valid JSON. I removed the comma after your last associative array within your "data" array. You shouldn't need a comma at the end of the array.
{
"data": [
{
"name": "Avatar",
"category": "Movie",
"id": "82771544063",
"created_time": "2012-04-13T21:16:56+0000"
},
{
"name": "HappyDance",
"category": "Movie",
"id": "243564344063",
"created_time": "2012-04-13T21:16:56+0000"
}
],
"paging": {
"next": "https://graph.facebook.com/me/likes? format=json&limit=5000&offset=5000&__after_id=5546653546361"
}
}
Parse error on line 14:
... }, ], "paging": {
---------------------^
Expecting 'STRING', 'NUMBER', 'NULL', 'TRUE', 'FALSE', '{', '['
As I removed the comma from the non-valid JSON. I was able to get the result you wanted.
<?php
$json_object = file_get_contents('fb.json');
if(!$json_object) {
echo "oops, cant read the file";
}
// remap json_object
$json_object = json_decode($json_object,true);
foreach($json_object['data'] as $item) {
$items[] = "I like" . ' ' . $item['id'];
/* If you want to just echo " I like xyz" etc
* use echo "I like" . $item['id'];
*/
}
$list = implode(',',$items);
echo $list;
?>