global file_get_contents variable outside of function possible? - php

Question

I have a json api I'm trying to feed to several functions. I'm not entirely sure how to make the file_get_contents global so that it can be accessed by multiple functions at once.
Here is my current PHP code:
function getVideoTitle($getVideoID) {
$json_output = file_get_contents("https://www.googleapis.com/youtube/v3/videos?id=".$getVideoID."&key={MY_KEY}&fields=items(id,snippet(title,description),statistics)&part=snippet,statistics");
$json = json_decode($json_output, true);
$video_title = $json['items'][0]['snippet']['title']; // Video Title
return $video_title;
}
function getVideoDesc($getVideoID) {
$json_output = file_get_contents("https://www.googleapis.com/youtube/v3/videos?id=".$getVideoID."&key={MY_KEY}&fields=items(id,snippet(title,description),statistics)&part=snippet,statistics");
$json = json_decode($json_output, true);
$video_description = $json['items'][0]['snippet']['description']; //Description
return $video_description;
}
echo getVideoTitle($getVideoID);
echo getVideoDesc($getVideoID);
If I remove the two $json variables and place them outside of the function I get an error that it couldn't find the variable $json.
Also, would making it a global variable make it run faster? Retrieving the API is currently running pretty slowly. Would it be wiser to switch to Javascript..? Thanks.

Answer 1

If the $json is supposed to be constant, then I believe you're better to create a class, since you need to provide the $getVideoID for the ID of the video, and additionally you have the ability to change the video conveniently :)
<?php
class MyVideoClass {
private $json = null;
public function __construct($videoID) {
$this->changeVideo($videoID);
}
public function changeVideo($videoID) {
$json_output = file_get_contents("https://www.googleapis.com/youtube/v3/videos?id=".$videoID."&key={MY_KEY}&fields=items(id,snippet(title,description),statistics)&part=snippet,statistics");
$this->json = json_decode($json_output, true);
}
function getVideoTitle() {
$video_title = $this->json['items'][0]['snippet']['title']; // Video Title
return $video_title;
}
function getVideoDesc() {
$video_description = $this->json['items'][0]['snippet']['description']; //Description
return $video_description;
}
}
// somewhere:
$myVideo = new MyVideoClass($yourVideoID);
echo $myVideo->getVideoTitle();
echo $myVideo->getVideoDesc();
// sometime else
$myVideo->changeVideo($anotherVideoID);
echo $myVideo->getVideoTitle();
echo $myVideo->getVideoDesc();

Answer 2

here what i have wrote for you
<?php
class Video{
private $data;
public function __construct($videoId, $key){
$json_output = file_get_contents("https://www.googleapis.com/youtube/v3/videos?id=".$videoId."&key=".$key."&fields=items(id,snippet(title,description),statistics)&part=snippet,statistics");
isset($json_output) ? $this->data = $json_output : $this->data = false;
}
public function getTitle(){
if($this->data){
$video_title = $this->data['items'][0]['snippet']['title']; // Video Description
return $video_title;
}else{
return false;
}
}
public function getDesc(){
if($this->data){
$video_desc = $this->data['items'][0]['snippet']['description']; // Video Title
return $video_desc;
}else{
return false;
}
}
public function change($videoId, $key){
$this->__construct($videoId, $key);
}
}
Usage Example:
include('video.php'); // if you going to save the class in separate file
$video = new Video('Video-Id-Here', 'your-key');
echo $video->getTitle().'<br/>';
echo $video->getDesc();
//new video
$video->change('new-video-id', 'new-key');
echo $video->getTitle().'<br/>';
echo $video->getDesc();
and you can add more functions to the class