Bricks: Explicit Fixed Width and Height.php

add_filter("the_content", "add_image_dimensions");

function add_image_dimensions($content)
{
    preg_match_all("/<img[^>]+>/i", $content, $images);

    if (count($images) < 1) {
        return $content;
    }

    foreach ($images[0] as $image) {
        preg_match_all(
            '/(alt|title|src|width|class|id|height)=("[^"]*")/i',
            $image,
            $img
        );

        if (!in_array("src", $img[1])) {
            continue;
        }

        if (!in_array("width", $img[1]) || !in_array("height", $img[1])) {
            $src = $img[2][array_search("src", $img[1])];
            $alt = in_array("alt", $img[1])
                ? " alt=" . $img[2][array_search("alt", $img[1])]
                : "";
            $title = in_array("title", $img[1])
                ? " title=" . $img[2][array_search("title", $img[1])]
                : "";
            $class = in_array("class", $img[1])
                ? " class=" . $img[2][array_search("class", $img[1])]
                : "";
            $id = in_array("id", $img[1])
                ? " id=" . $img[2][array_search("id", $img[1])]
                : "";
            list($width, $height, $type, $attr) = getimagesize(
                str_replace("\"", "", $src)
            );

            $image_tag = sprintf(
                '<img src=%s%s%s%s%s width="%d" height="%d" />',
                $src,
                $alt,
                $title,
                $class,
                $id,
                $width,
                $height
            );
            $content = str_replace($image, $image_tag, $content);
        }
    }

    return $content;
}