Make First Call PHP File

first.php

<?php

// 1. Autoload the SDK Package. This will include all the files and classes to your autoloader
require __DIR__  . '/php-client/autoload.php';

// 2. Provide your Token. Replace the given one with your app Token
// https://accounts.blockcypher.com/dashboard
$token = 'c0afcccdde5081d6429de37d16166ead';
$apiContext = new \BlockCypher\Rest\ApiContext(
	new \BlockCypher\Auth\SimpleTokenCredential($token)
);

// 3. Lets try to create a new webhook using WebHook API mentioned here
// http://dev.blockcypher.com/#webhooks
$webHook = new \BlockCypher\Api\WebHook();
$webHook->setUrl("https://requestb.in/slmm49sl?uniqid=" . uniqid());
$webHook->setEvent('unconfirmed-tx');

// 4. Make a Create Call and Print the Card
try {
    $webHook->create($apiContext);
    echo $webHook;
}
catch (\BlockCypher\Exception\BlockCypherConnectionException $ex) {
    // This will print the detailed information on the exception. 
    //REALLY HELPFUL FOR DEBUGGING
    echo $ex->getData();
}

PHP Fatal error: Uncaught TypeError: sizeof(): Argument #1 ($value) must be of type Countable|array, string given in C:\Users\rezau\Downloads\test\vendor\blockcypher\php-client\lib\BlockCypher\Common\BlockCypherModel.php:296 Stack trace: #0 C:\Users\rezau\Downloads\test\vendor\blockcypher\php-client\lib\BlockCypher\Common\BlockCypherModel.php(296): sizeof('https://request...') #1 C:\Users\rezau\Downloads\test\vendor\blockcypher\php-client\lib\BlockCypher\Common\BlockCypherModel.php(281): BlockCypher\Common\BlockCypherModel->_convertToArray(Array) #2 C:\Users\rezau\Downloads\test\vendor\blockcypher\php-client\lib\BlockCypher\Common\BlockCypherModel.php(268): BlockCypher\Common\BlockCypherModel->toArray() #3 C:\Users\rezau\Downloads\test\vendor\blockcypher\php-client\lib\BlockCypher\Api\WebHook.php(146): BlockCypher\Common\BlockCypherModel->toJSON() #4 C:\Users\rezau\Downloads\test\first.php(22): BlockCypher\Api\WebHook->create(Object(BlockCypher\Rest\ApiContext)) #5 {main} thrown in C:\Users\rezau\Downloads\test\vendor\blockcypher\php-client\lib\BlockCypher\Common\BlockCypherModel.php on line 296

Fatal error: Uncaught TypeError: sizeof(): Argument #1 ($value) must be of type Countable|array, string given in C:\Users\rezau\Downloads\test\vendor\blockcypher\php-client\lib\BlockCypher\Common\BlockCypherModel.php:296 Stack trace: #0 C:\Users\rezau\Downloads\test\vendor\blockcypher\php-client\lib\BlockCypher\Common\BlockCypherModel.php(296): sizeof('https://request...') #1 C:\Users\rezau\Downloads\test\vendor\blockcypher\php-client\lib\BlockCypher\Common\BlockCypherModel.php(281): BlockCypher\Common\BlockCypherModel->_convertToArray(Array) #2 C:\Users\rezau\Downloads\test\vendor\blockcypher\php-client\lib\BlockCypher\Common\BlockCypherModel.php(268): BlockCypher\Common\BlockCypherModel->toArray() #3 C:\Users\rezau\Downloads\test\vendor\blockcypher\php-client\lib\BlockCypher\Api\WebHook.php(146): BlockCypher\Common\BlockCypherModel->toJSON() #4 C:\Users\rezau\Downloads\test\first.php(22): BlockCypher\Api\WebHook->create(Object(BlockCypher\Rest\ApiContext)) #5 {main} thrown in C:\Users\rezau\Downloads\test\vendor\blockcypher\php-client\lib\BlockCypher\Common\BlockCypherModel.php on line 296

Hi @rzw-gh this is an ancient code.

The PHP client was even archived https://github.com/blockcypher/php-client in 2020