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Add Open Graph and Twitter Card meta tags to all public pages

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- templates/public/head.php: add centralised OG/Twitter tag rendering via $ogTags array;
  supports type, title, description, url, image, image_alt, site_name, article_author,
  article_published_time; twitter:card switches between summary_large_image / summary
  based on presence of og:image

- public/tfe.php: populate full article OG tags — og:type=article, canonical URL,
  og:image resolved from banner_path → first image file in thesis_files → omitted,
  og:image:alt, article:author, article:published_time (year-01-01); twitter:card
  summary_large_image when image present

- public/index.php, search.php, apropos.php, licence.php: add basic og:type=website
  tags (title, description, canonical url, site_name)

Sharing a thesis link on Slack, WhatsApp, iMessage, or any social platform will now
render a rich preview card with the thesis title, synopsis excerpt, and cover/banner image.
This commit is contained in:
Pontoporeia
2026-03-29 15:43:21 +02:00
parent 1dee1ea73f
commit 3a8ffa6afe
7 changed files with 105 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
public/apropos.php
View File

@@ -26,6 +26,13 @@ $pd->setSafeMode(true);
$aboutHtml = $pd->text($rawContent);
$pageTitle = 'À Propos – Posterg';
$metaDescription = 'À propos de Posterg, le répertoire des mémoires de fin d\'études de l\'erg – École de Recherches Graphiques de Bruxelles.';
$ogTags = [
'type' => 'website',
'title' => $pageTitle,
'description' => $metaDescription,
'url' => 'https://posterg.erg.be/apropos.php',
'site_name' => 'Posterg – ERG',
];
$extraCss = ['assets/apropos.css'];
?>
<?php include APP_ROOT . '/templates/public/head.php'; ?>

7
public/index.php
View File

@@ -52,6 +52,13 @@ try {
$currentNav = '';
$pageTitle = 'Posterg – Mémoires de l\'ERG';
$metaDescription = 'Posterg répertorie et valorise les mémoires de fin d\'études (TFE) de l\'erg – École de Recherches Graphiques de Bruxelles.';
$ogTags = [
'type' => 'website',
'title' => $pageTitle,
'description' => $metaDescription,
'url' => 'https://posterg.erg.be/',
'site_name' => 'Posterg – ERG',
];
$extraCss = ['assets/main.css'];
?>
<?php include APP_ROOT . '/templates/public/head.php'; ?>

7
public/licence.php
View File

@@ -22,6 +22,13 @@ $html = $pd->text($content);
$pageTitle = $licencePageTitle . ' – Posterg';
$metaDescription = 'Informations sur les licences d\'utilisation des mémoires publiés sur Posterg, le répertoire des TFE de l\'erg.';
$ogTags = [
'type' => 'website',
'title' => $pageTitle,
'description' => $metaDescription,
'url' => 'https://posterg.erg.be/licence.php',
'site_name' => 'Posterg – ERG',
];
$extraCss = ['assets/apropos.css'];
?>
<?php include APP_ROOT . '/templates/public/head.php'; ?>

7
public/search.php
View File

@@ -63,6 +63,13 @@ $currentNav = 'repertoire';
$searchBarValue = $_GET['query'] ?? '';
$pageTitle = 'Répertoire – Posterg';
$metaDescription = 'Parcourez le répertoire des mémoires de fin d\'études (TFE) de l\'erg – École de Recherches Graphiques de Bruxelles. Recherche par année, orientation, atelier et mots-clés.';
$ogTags = [
'type' => 'website',
'title' => $pageTitle,
'description' => $metaDescription,
'url' => 'https://posterg.erg.be/search.php',
'site_name' => 'Posterg – ERG',
];
$extraCss = ['assets/search.css'];
?>
<?php include APP_ROOT . '/templates/public/head.php'; ?>

31
public/tfe.php
View File

@@ -25,6 +25,37 @@ $metaDescription = mb_strlen($_synopsisRaw) > 160
? mb_substr($_synopsisRaw, 0, 157) . '…'
: (empty($_synopsisRaw) ? 'Mémoire de fin d\'études – Posterg, répertoire des TFE de l\'erg.' : $_synopsisRaw);
unset($_tfeAuthor, $_synopsisRaw);
// --- Open Graph / Twitter Card tags ------------------------------------------
$_ogBaseUrl = 'https://posterg.erg.be';
// Resolve OG image: banner → first image file → none
$_ogImage = '';
if (!empty($data['banner_path'])) {
$_ogImage = $_ogBaseUrl . '/media.php?path=' . rawurlencode($data['banner_path']);
} elseif (!empty($data['files'])) {
foreach ($data['files'] as $_f) {
$_ext = strtolower(pathinfo($_f['file_path'], PATHINFO_EXTENSION));
if (in_array($_ext, ['jpg', 'jpeg', 'png', 'gif', 'webp'])) {
$_ogImage = $_ogBaseUrl . '/media.php?path=' . rawurlencode($_f['file_path']);
break;
}
}
unset($_f, $_ext);
}
$ogTags = [
'type' => 'article',
'title' => $data['title'] . (!empty($data['authors']) ? ' – ' . $data['authors'] : ''),
'description' => $metaDescription,
'url' => $_ogBaseUrl . '/tfe.php?id=' . $thesisId,
'image' => $_ogImage,
'image_alt' => $data['title'] . (!empty($data['authors']) ? ' par ' . $data['authors'] : ''),
'site_name' => 'Posterg – ERG',
'article_author' => $data['authors'] ?? '',
'article_published_time' => !empty($data['year']) ? $data['year'] . '-01-01' : '',
];
unset($_ogBaseUrl, $_ogImage);
// --- End Open Graph ----------------------------------------------------------
$extraCss = ['assets/tfe.css'];
?>
<?php include APP_ROOT . '/templates/public/head.php'; ?>