[PHP][WORDPRESS] Donwload a file from external url and attach it to mail and remove it (help with email function send_email_attachment)

functions.php

<?php
    
    function send_email_attachment($to, $subject, $template,$render_object,$attachments)
    {
        $headers = array('Content-Type: text/html; charset=UTF-8',  'From: SiteName <noreply@siteDomain>');
        $GLOBALS["use_html_content_type"] = TRUE;
        ob_start();
        require(locate_template($template));
        $body = ob_get_contents();
        ob_end_clean();
        wp_mail($to, $subject, $body, $headers,$attachments);
    }

sendAttachment.php

<?php
/*
* @author Giorgos Iliopoulos
*/
    $email = 'To email';
	$subject = 'Your title';
	$template = 'Path to your email template';
	$link = "Your Download Link";
	
	$ch = curl_init();
	$source = $link;
	curl_setopt($ch, CURLOPT_URL, $source);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	$data = curl_exec($ch);
	curl_close($ch);
    
    $filename = 'Your filename';

	// If we can't download the file (False Link)
	if (str_contains( $data, 'Could not find' )){
        // Do something
	}

	$destination = "Absolute path to the folder you want the file to be downloaded";
	$file = fopen($destination, "w+");
	fputs($file, $data);
	fclose($file);

	$attachments = array(ABSPATH . 'absolute-path-to-folder/'.$filename.'.{file extension}'); //
	send_email_attachment($email, $subject, $template, 'render_sth_for_template', $attachments);

	$path = ABSPATH. 'absolute-path-to-folder/'.$filename.'.tiff';
	unlink($path);