function first_og_image_from_html_string($str = '')
{
if (empty($str)) {
return false;
}
$urls = hrefs_from_html_string($str);
foreach ($urls as $url) {
if (is_opengraphable_image($url)) {
return $url;
}
}
return false;
}
<meta property="og:description" content="<?php
if (isset($page->version_index)) {
echo htmlspecialchars(create_excerpt($page->versions[$page->version_index]->content, 34));
} else {
echo htmlspecialchars(trim(strip_tags($description)));
}
?>
" />
<meta property="og:image" content="<?php
$default_img = $app_root . 'views/arbors/html5_RDFa/scalar_logo_300x300.png';
if (isset($page->version_index)) {
$img = first_og_image_from_html_string($page->versions[$page->version_index]->content);
$url = $page->versions[$page->version_index]->url;
if (!empty($img)) {
echo abs_url(str_replace(' ', '%20', $img), base_url() . $book->slug);
} elseif (!empty($url) && is_opengraphable_image($url)) {
echo abs_url(str_replace(' ', '%20', $url), base_url() . $book->slug);
} elseif (!empty($banner)) {
echo abs_url(str_replace(' ', '%20', $banner), base_url() . $book->slug);
} elseif (!empty($background)) {
echo abs_url(str_replace(' ', '%20', $background), base_url() . $book->slug);
} else {
echo $default_img;
}
} else {
echo $default_img = $app_root . 'views/arbors/html5_RDFa/scalar_logo_300x300.png';
}
?>
" />
<meta property="og:type" content="article" />
<?php
