MailGun attachment not showing up PHP - php

Question

Email shows up with no file attached. I have a text file at test/test.txt which will not attach. Here is a simple function. When used, the email shows up with no attachment:
function send_email_with_attachment($email,$name){
$mgClient = new Mailgun(MAILGUN_KEY);
$domain = "mg.example.com";
$file = array(
array(
'filePath' => 'test',
'filename' => 'test.txt'
)
);
$result = $mgClient->sendMessage($domain,array(
"from" => "Company Support <support#example.com>",
"to" => "{$name}<{$email}>",
"subject" => "File Attached",
"text" => "Here is a cool text file",
'attachment' => json_encode($file)
));
}

Answer 1

Why don't use directly attachment like that:
$result = $mgClient->sendMessage($domain,array(
"from" => "Company Support <support#example.com>",
"to" => "{$name}<{$email}>",
"subject" => "File Attached",
"text" => "Here is a cool text file",
'attachment' => [
['filePath'=>'/test.txt', 'filename'=>'test']
]
));
Try this code to from official source:
$mg->messages()->send('example.com', [
'from' => 'bob#example.com',
'to' => 'sally#example.com',
'subject' => 'Test file path attachments',
'text' => 'Test',
'attachment' => [
['filePath'=>'/tmp/foo.jpg', 'filename'=>'test.jpg']
]
]);

Answer 2

The issue had to do with the confusion on my part about how Mailgun shows their example filePath and filename variable values.
As stated above, here is one the examples from MailGun:
$mg->messages()->send('example.com', [
'from' => 'bob#example.com',
'to' => 'sally#example.com',
'subject' => 'Test file path attachments',
'text' => 'Test',
'attachment' => [
['filePath'=>'/tmp/foo.jpg', 'filename'=>'test.jpg'] //what? Which file is being sent?
]
]);
There were a couple of gotcha's here for me:
First was that I was using a path relative to the php file and not from the root of my server.
The second was that I didn't understand the mailgun example. In the example, which file is being sent? For me, this example would have been clearer:
$mg->messages()->send('example.com', [
'from' => 'bob#example.com',
'to' => 'sally#example.com',
'subject' => 'Test file path attachments',
'text' => 'Test',
'attachment' => [
['filePath'=>'/tmp/foo.jpg', 'filename'=>'foo.jpg'] //this is a better way to demonstrate
]
]);