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Editing: index.php

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<?php
/**************************************************************************
 *  TAGS INDEX / VIEWER   •  single‑file drop‑in
 *  -------------------------------------------------
 *  1.   Lists all tag files   ( /tags/*.txt , *.md )
 *  2.   ?t=slug   → shows that one tag
 *       /tags/slug           also works via .htaccess rewrite
 *  3.   Text file format:
 *           ---              ← optional YAML front‑matter
 *           tag: emf protection
 *           updated: 2025‑07‑24T03:12:00Z
 *           ---
 *           Your blurb **markdown** here …
 *
 *       Front‑matter is optional—if missing we still show body.
 **************************************************************************/

/* ---------- config --------------------------------------------------- */
$dir   = __DIR__;                       // /business/<slug>/tags/
$title = 'Tags';                        // page <title>

/* ---------- helper: tiny YAML parser (if ext/yaml not enabled) ------- */
if (!function_exists('yaml_parse')) {
    function yaml_parse(string $txt) {  // VERY basic: key: value only
        $out=[];
        foreach (preg_split('/\r?\n/', $txt) as $ln) {
            if (strpos($ln, ':')!==false) {
                [$k,$v]=explode(':', $ln, 2);
                $out[trim($k)] = trim($v);
            }
        }
        return $out;
    }
}

/* ---------- find requested tag -------------------------------------- */
$tagParam = preg_replace('/[^a-z0-9_-]/i', '', $_GET['t'] ?? '');
if (!$tagParam && preg_match('#/tags/([^/]+)$#', $_SERVER['REQUEST_URI'], $m)) {
    $tagParam = preg_replace('/[^a-z0-9_-]/i', '', $m[1]);
}

$file      = $tagParam ? "$dir/$tagParam.txt" : '';
$renderOne = is_file($file);

/* ---------- HTML head ------------------------------------------------ */
?>
<!doctype html><html lang="en"><head>
<meta charset="utf-8">
<title><?=htmlspecialchars($renderOne ? ucfirst($tagParam) : $title)?></title>
<meta name="viewport" content="width=device-width,initial-scale=1">
<style>
:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
      --violet:#5c3bff;--gold:#ffb63b}
body{margin:0;background:#f5f8fb;color:#1b334a;line-height:1.5}
main{max-width:780px;margin:2rem auto;padding:0 1rem}
a{color:var(--violet);text-decoration:none}
a:hover{text-decoration:underline}

/* tag list grid ------------------------------------------------------ */
.tag-list{display:grid;gap:1.1rem;grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}
.tag{background:#fff;border:2.5px solid var(--gold);border-radius:18px;
     box-shadow:0 4px 16px #c2d4ff33;padding:1.1rem;text-align:center;font-weight:700}

/* blurb card --------------------------------------------------------- */
.blurb{background:#fff;border:3.5px solid var(--gold);border-radius:27px;
       box-shadow:0 6px 26px #dde3fa50;padding:2rem 1.6rem}
.blurb h1{margin-top:0;font-size:1.7rem;color:#2c61d7}
.blurb p{margin:.8rem 0}
</style>
</head><body><main>
<?php
/* ---------- single tag view ----------------------------------------- */
if ($renderOne) {
    $raw = file_get_contents($file);

// pull optional front‑matter
    if (preg_match('/^---\s*(.*?)\s*---\s*(.*)$/s', $raw, $m)) {
        $meta  = yaml_parse($m[1]);
        $body  = $m[2];
        $tag   = $meta['tag']     ?? $tagParam;
        $title = ucfirst($tag);
    } else {
        $meta  = [];
        $body  = $raw;
        $title = ucfirst(str_replace('-',' ',$tagParam));
    }

// very light Markdown: **bold** & line‑breaks
    $html = nl2br(preg_replace('/\*\*(.+?)\*\*/','<strong>$1</strong>', htmlspecialchars($body)));

echo '<article class="blurb">';
    echo '<h1>'.htmlspecialchars($title).'</h1>';
    echo $html;
    echo '<p><a href="./">&larr; Back to all tags</a></p>';
    echo '</article>';

} else {
    /* ---------- list all tags --------------------------------------- */
    $files = glob("$dir/*.txt");
    natsort($files);
    if (!$files) { echo '<p>No tags yet.</p>'; exit; }

echo '<h1 style="margin-top:0">All Tags</h1>';
    echo '<div class="tag-list">';
    foreach ($files as $f) {
        $slug = basename($f, '.txt');
        $name = ucfirst(str_replace('-',' ', $slug));
        echo '<a class="tag" href="?t='.urlencode($slug).'">'.$name.'</a>';
    }
    echo '</div>';
}
?>
</main></body></html>

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Editing: index.php

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