CopyAsanaTasks.php

function asanaRequest($methodPath, $httpMethod = 'GET', $body = null)
{
	$apiKey = 'ASANA_API_KEY_HERE'; /// Get it from http://app.asana.com/-/account_api
	
	$url = "https://app.asana.com/api/1.0/$methodPath";
	$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL, $url);
	curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC ) ; 
	curl_setopt($ch, CURLOPT_USERPWD, $apiKey); 
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $httpMethod);
	if ($body)
	{
		if (!is_string($body))
		{
			$body = json_encode($body);
		}
		curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
		curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
	}
	
	$data = curl_exec($ch);
	
	curl_close($ch);
	
	$result = json_decode($data, true);
	return $result;
}

function createTask($workspaceId, $projectId, $task)
{
	$data = array('data' => $task);
	$result = asanaRequest("workspaces/$workspaceId/tasks", 'POST', $data);
	if ($result['data'])
	{
		$newTask = $result['data'];
		$newTaskId = $newTask['id'];
		$data = array('data' => array('project' => $projectId));
		$result = asanaRequest("tasks/$newTaskId/addProject", 'POST', $data);
		return $newTask;
	}
	
	return $result;
}

function copyTasks($fromProjectId, $toProjectId)
{
	$result = asanaRequest("projects/$toProjectId");
	if (!$result['data'])
	{
		return;
	}
	$workspaceId = $result['data']['workspace']['id'];
	$result = asanaRequest("projects/$fromProjectId/tasks?opt_pretty&opt_fields=name,due_on,assignee_status,notes,assignee");
	$tasks = $result['data'];
	for ($i = count($tasks) - 1; $i >= 0; $i--)
	{
		$task = $tasks[$i];
		$newTask = $task;
		unset($newTask['id']);
		$newTask['assignee'] = $newTask['assignee']['id'];
		foreach ($newTask as $key => $value)
		{
			if (empty($value))
			{
				unset($newTask[$key]);
			}
		}
		$newTask = createTask($workspaceId, $toProjectId, $newTask);
		if ($newTask['id'])
		{
			$taskId = $task['id'];
			$result = asanaRequest("tasks/$taskId/stories");
			$comments = array();
			foreach ($result['data'] as $story)
			{
				$date = date('l M d, Y h:i A', strtotime($story['created_at']));
				$comment = " ­\n" . $story['created_by']['name'] . ' on ' . $date . ":\n" . $story['text'];
				$comments[] = $comment;
			}
			$comment = implode("\n----------------------", $comments);
			$data = array('data' => array('text' => $comment));
			$newTaskId = $newTask['id'];
			$result = asanaRequest("tasks/$newTaskId/stories", 'POST', $data);
		}
	}
}

/// Sample usage
copyTasks(12345678910, 98765432110); /// Get those numbers from the URL of the project