只返回1个结果，我该如何归还？

I am currently building a simple_html_dom.php script and I am trying to parse all of the data and store it into one string so I can submit the data into my WordPress site, here's what I have so far.

$test = $html->find('.post img', 0);
$src = $test->plaintext;

if (strpos($src, '/wp-content/uploads/20') !== false) {
    print '<br>';
    $premade = '<img src="'.$src.'" class="data-m" />';
    print htmlspecialchars($premade);
}

$my_post = array(
    'post_title'    => wp_strip_all_tags( trim( $uej ) ),
    'post_status'   => 'publish',
    'post_author'   => 1,
    'post_content' => $premade,
    'post_category' => array(6),
    'post_date' => date('Y-m-d H:i:s')
);

This is returning only one result when I print it out, how can I make it so that all of the results are compiled into one string?