PHP Code to use YouTube's API to get statisticts on one or more YouTube Channels by their name.

youtube_channel_stats.php

<?php
ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(-1);

// Youtube API to get stats for a channel
// Example call, but you will need an API key from Google to use the API
// https://www.googleapis.com/youtube/v3/channels?part=statistics&forUsername=kontor&key={YOUR_API_KEY}

// Returns: 
/*
{
 "kind": "youtube#channelListResponse",
 "etag": "\"IHLB7Mi__JPvvG2zLQWAg8l36UU/wUS5SuWuhn9EVxWUX1pQqQWrG9A\"",
 "pageInfo": {
  "totalResults": 1,
  "resultsPerPage": 5
 },
 "items": [
  {
   "kind": "youtube#channel",
   "etag": "\"IHLB7Mi__JPvvG2zLQWAg8l36UU/4QonHZaxbXgUV0ZP-JMr-gipk4Y\"",
   "id": "UCb3tJ5NKw7mDxyaQ73mwbRg",
   "statistics": {
    "viewCount": "2672718210",
    "commentCount": "9581",
    "subscriberCount": "2928060",
    "hiddenSubscriberCount": false,
    "videoCount": "1452"
   }
  }
 ]
}
     */

// Comma seperated list of YouTube channel names to get the stats for
//$screen_names = "chevrolet,Chrysler,dodge,Acura,ford,BMWUSA,Honda,Hyundai,infiniti,kia,JaguarUSA,lexus,Lincoln,Mazda,mercedesbenzusa,Mitsubishi,Buick,nissancanada,nissanusa,porsche,subaruofamerica,toyota,vw,VolvocarsUS,SuzukiCycles,cadillac,audi,gmc,jeep,landroverusa";
$screen_names = "IngramMicroUK,tdukmedia,HP,Cisco,Acer,Toshiba,SONYUK,samsung,microsoft,MotorolaSolutions,htcgb,apple";

// Explode the list into an array
$screen_names_array = explode(",", $screen_names);

// Iterate through the array to get the stats
foreach ($screen_names_array as $screen_name) {        
    
    // Call the API to get the data
    $data = (json_decode(file_get_contents('https://www.googleapis.com/youtube/v3/channels?part=statistics&forUsername='. $screen_name .'&key={YOUR_API_KEY}')));    
    
    //var_dump($data->items[0]->statistics->subscriberCount);
    
    // Check data is returned and output it
    if (isset($data))
    {
        // Some channels hide the subscriber count
        if (!$data->items[0]->statistics->hiddenSubscriberCount)
            echo "<br><a href='https://www.youtube.com/user/". $screen_name ."' target='_blank'>". $screen_name ."</a> Subscriber Count: ". number_format($data->items[0]->statistics->subscriberCount);
        else
            echo "<br><a href='https://www.youtube.com/user/". $screen_name ."' target='_blank'>". $screen_name ."</a> Subscriber Count: Count of subscribers private";
        
        echo "<br><a href='https://www.youtube.com/user/". $screen_name ."' target='_blank'>". $screen_name ."</a> View Count: ". number_format($data->items[0]->statistics->viewCount);
        echo "<br><a href='https://www.youtube.com/user/". $screen_name ."' target='_blank'>". $screen_name ."</a> Comment Count: ". number_format($data->items[0]->statistics->commentCount);
        echo "<br><a href='https://www.youtube.com/user/". $screen_name ."' target='_blank'>". $screen_name ."</a> Video Count: ". number_format($data->items[0]->statistics->videoCount);
        echo "<br><br>";
    }
}

// End of youtube_channel_stats.php