Retrieve ALL video datas with Youtube API V3 PHP - php

Question

I am having issues with YouTube Data API. I'm working on a PHP function to retrieve all videos information in JSON format from a YouTube channel, and then put that into a file.
So far I managed to call the API and retrieve the first 50 videos info; am also knowing the method to create the file.
I know that I have to use the nextPageToken parameter to loop the function until there is no nextPageToken, but I'm stuck. I've seen a lot of similar posts with this problem, but none of them really helped me.
To sum up, I need help to:
use nextPageToken to collect information after 50 videos;
collect this information each turn of the loop.
So far the code I found and used:
function youtube_search($API_key, $channelID, $max_results, $next_page_token=''){
$myQuery = "https://www.googleapis.com/youtube/v3/search?key=".$API_key."&channelId=".$channelID."&part=snippet,id&order=date&maxResults=".$max_results;
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $myQuery);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_VERBOSE, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
$response = curl_exec($ch);
curl_close($ch);
$data = json_decode($response);
if(!empty($data->nextPageToken)){
return youtube_search($API_key, $channelID, $max_results, $searchResponse['nextPageToken']);
}
}
youtube_search($API_key, $channelID, $max_results, $next_page_token='');
Thank you for helping (am a humble beginner -_-).

Answer 1

I asked a friend and he helped me with my issue. This code didn't work because I didn't have the right arguments... and many other problems. This code works to retrieve videos info from a channel and write it in a JSON file
<?php
$API_key = 'API_key';
$channelID = 'channelID';
$max_results = 50;
$table = array();
$file_name = 'all-videos.json';
function youtube_search($API_key, $channelID, $max_results, $next_page_token,$videos,$file){
$dataquery = "https://www.googleapis.com/youtube/v3/search?part=snippet&channelId=".$channelID."&maxResults=".$max_results."&order=date&pageToken=".$next_page_token."&key=".$API_key;
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $dataquery);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_VERBOSE, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
$response = curl_exec($ch);
curl_close($ch);
$data = json_decode($response);
foreach ($data->items as $item){
array_push($videos,$item);
}
$content = json_encode($videos);
file_put_contents($file, $content);
if(!empty($data->nextPageToken)){
youtube_search($API_key, $channelID, $max_results, $data->nextPageToken, $videos, $file);
}
}
youtube_search($API_key, $channelID, $max_results, $next_page_token='', $table, $file_name);
?>

Answer 2

(Disclaimer: this is not an actual answer to OP's question, but only a code refactoring of his own answer below.)
Here is your code refactored such that to have a do...while loop instead of tail recursion:
function youtube_search_paginated(
$API_key, $channelID, $max_results, $next_page_token, $videos, $file)
{
$dataquery = "https://www.googleapis.com/youtube/v3/search?part=snippet&channelId=".$channelID."&maxResults=".$max_results."&order=date&key=".$API_key;
if (!empty($next_page_token))
$dataquery .= "&pageToken=".$next_page_token;
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $dataquery);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_VERBOSE, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
$response = curl_exec($ch);
curl_close($ch);
$data = json_decode($response);
foreach ($data->items as $item){
array_push($videos,$item);
}
$content = json_encode($videos);
file_put_contents($file, $content);
return $data->nextPageToken;
}
function youtube_search(
$API_key, $channelID, $max_results, $videos, $file)
{
$next_page_token = NULL;
do {
$next_page_token = youtube_search_paginated(
$API_key, $channelID, $max_results, $next_page_token, $videos, $file);
} while (!empty($next_page_token));
}
youtube_search($API_key, $channelID, $max_results, $table, $file_name);