cachewerk · dhobi · May 28, 2026
diff --git a/composer.json b/composer.json
@@ -13,5 +13,10 @@
     },
     "require-dev": {
         "heroku/heroku-buildpack-php": "dev-main"
+    },
+    "scripts": {
+        "compile": [
+            "./web/compile.sh"
+        ]
     }
 }
diff --git a/web/compile.sh b/web/compile.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+set -e
+
+RELAY_INI=`find $(php-config --ini-dir) -name "*-relay.ini"`
+
+sed -i 's/^;\? \?relay.maxmemory =.*/relay.maxmemory = 100M/' $RELAY_INI
+sed -i 's/^;\? \?relay.eviction_policy =.*/relay.eviction_policy = lru/' $RELAY_INI
diff --git a/web/header.phtml b/web/header.phtml
@@ -35,6 +35,10 @@
               </a>
             </div>
           </div>
+          <div class="mt-4 flex justify-center">
+              <a href="/" class="text-sm text-indigo-600 hover:underline m-2">Home</a>
+              <a href="/versions.php" class="text-sm text-indigo-600 hover:underline m-2">See all versions</a>
+            </div>
         </div>
       </div>
   </header>

diff --git a/web/versions.php b/web/versions.php
@@ -0,0 +1,244 @@
+<?php
+// versions.php
+// Generates HTML tables of extension versions from hardcoded packages.json URLs.
+
+// Hardcoded packages.json URLs (edit as needed)
+$urls = [
+    'https://heroku-php-extensions.s3.amazonaws.com/dist-heroku-24-amd64-stable/packages.json',
+    'https://heroku-php-extensions.s3.amazonaws.com/dist-heroku-22-stable/packages.json',
+    'https://heroku-php-extensions.s3.amazonaws.com/dist-heroku-20-stable/packages.json',
+    'https://heroku-php-extensions.s3.amazonaws.com/dist-heroku-18-stable/packages.json'    
+];
+
+$relay = new Relay\Relay;
+$relay->connect(getenv('UPSTASH_REDIS_REST_URL'), 6379);
+$relay->auth(['default', getenv('UPSTASH_REDIS_REST_TOKEN')]);
+
+$table = new Relay\Table('packages');
+
+function fetch_json(string $url, $table): ?array 
+{
+    if($table->exists($url)) {
+        $cached = $table->get($url);
+        if ($cached) {
+            return json_decode($cached, true);
+        }
+    }
+    $opts = [
+        'http' => [
+            'method' => 'GET',
+            'header' => "User-Agent: PHP\r\n",
+            'timeout' => 10,
+        ],
+    ];
+    $context = stream_context_create($opts);
+    $json = @file_get_contents($url, false, $context);
+    if ($json === false) {
+        error_log("Failed to fetch: $url");
+        return null;
+    }
+    $table->set($url, $json);
+    $data = json_decode($json, true);
+    if (json_last_error() !== JSON_ERROR_NONE) {
+        error_log("JSON decode error for $url: " . json_last_error_msg());
+        return null;
+    }
+    return $data;
+}
+
+function parse_packages(array $packages_data): array
+{
+    $stacks = [];
+    if (!isset($packages_data['packages'])) {
+        return $stacks;
+    }
+
+    $packages = $packages_data['packages'];
+    $package_list = [];
+
+    // If associative array (package-name => [versions])
+    $is_assoc = array_keys($packages) !== range(0, count($packages) - 1);
+    if ($is_assoc) {
+        foreach ($packages as $package_name => $versions) {
+            if (is_array($versions)) {
+                foreach ($versions as $version_info) {
+                    $package_list[] = $version_info;
+                }
+            }
+        }
+    } else {
+        // Flatten lists
+        foreach ($packages as $item) {
+            if (is_array($item) && array_keys($item) === range(0, count($item) - 1)) {
+                foreach ($item as $sub) {
+                    $package_list[] = $sub;
+                }
+            } else {
+                $package_list[] = $item;
+            }
+        }
+    }
+
+    foreach ($package_list as $version_info) {
+        if (!is_array($version_info)) {
+            continue;
+        }
+        $package_name = $version_info['name'] ?? null;
+        if (!$package_name || strpos($package_name, 'heroku-sys/ext-') !== 0) {
+            continue;
+        }
+        $ext_name = substr($package_name, strlen('heroku-sys/ext-'));
+        $ext_version = $version_info['version'] ?? null;
+        if (!$ext_version) {
+            continue;
+        }
+        $require = $version_info['require'] ?? [];
+        $php_req = $require['heroku-sys/php'] ?? null;
+        $stack_req = $require['heroku-sys/heroku'] ?? null;
+        if (!$php_req || !$stack_req) {
+            continue;
+        }
+
+        // Parse stack (e.g., ^22.0.0 -> 22 -> heroku-22)
+        if (preg_match('/\^?(\d+)\./', $stack_req, $m)) {
+            $stack = 'heroku-' . $m[1];
+        } else {
+            continue;
+        }
+
+        // Parse PHP version like 7.3.* -> 7.3
+        if (preg_match('/(\d+\.\d+)\.\*/', $php_req, $m2)) {
+            $php_version = $m2[1];
+        } else {
+            continue;
+        }
+
+        $stacks[$stack][$php_version][$ext_name][] = $ext_version;
+    }
+
+    // Deduplicate and sort versions
+    foreach ($stacks as $stack_name => $phps) {
+        foreach ($phps as $php => $exts) {
+            foreach ($exts as $ext => $versions) {
+                $unique = array_values(array_unique($versions));
+                usort($unique, function ($a, $b) {
+                    return version_compare($a, $b);
+                });
+                $stacks[$stack_name][$php][$ext] = $unique;
+            }
+        }
+    }
+
+    return $stacks;
+}
+
+// Merge stacks from multiple manifests
+$all_stacks = [];
+foreach ($urls as $url) {
+    $data = fetch_json($url, $table);
+    if ($data === null) {
+        continue;
+    }
+    $st = parse_packages($data);
+    // Merge into all_stacks
+    foreach ($st as $stack => $phps) {
+        foreach ($phps as $php => $exts) {
+            foreach ($exts as $ext => $versions) {
+                if (!isset($all_stacks[$stack][$php][$ext])) {
+                    $all_stacks[$stack][$php][$ext] = [];
+                }
+                $all_stacks[$stack][$php][$ext] = array_merge($all_stacks[$stack][$php][$ext], $versions);
+            }
+        }
+    }
+}
+
+// Final dedupe and sort after merge
+foreach ($all_stacks as $stack_name => $phps) {
+    foreach ($phps as $php => $exts) {
+        foreach ($exts as $ext => $versions) {
+            $unique = array_values(array_unique($versions));
+            usort($unique, function ($a, $b) {
+                return version_compare($a, $b);
+            });
+            $all_stacks[$stack_name][$php][$ext] = $unique;
+        }
+    }
+}
+
+// Helper to sort php versions like 7.3, 8.0 numerically
+function sort_php_versions(array $versions): array
+{
+    usort($versions, function ($a, $b) {
+        $pa = array_map('intval', explode('.', $a));
+        $pb = array_map('intval', explode('.', $b));
+        for ($i = 0; $i < max(count($pa), count($pb)); $i++) {
+            $va = $pa[$i] ?? 0;
+            $vb = $pb[$i] ?? 0;
+            if ($va === $vb) continue;
+            return $va <=> $vb;
+        }
+        return 0;
+    });
+    return $versions;
+}
+
+// Render HTML using site header/footer and Tailwind styling
+ini_set('display_errors', 1);
+error_reporting(E_ALL);
+
+require __DIR__ . '/header.phtml';
+
+if (empty($all_stacks)) {
+    echo "<section class=\"max-w-2xl mx-auto\"><p class=\"text-sm text-gray-500\">No data available.</p></section>\n";
+    require __DIR__ . '/footer.phtml';
+    exit;
+}
+
+foreach ($all_stacks as $stack => $phps) {
+    // gather all extensions and php versions
+    $all_extensions = [];
+    $all_php_versions = [];
+    foreach ($phps as $php => $exts) {
+        $all_php_versions[] = $php;
+        foreach ($exts as $ext => $_) {
+            $all_extensions[$ext] = true;
+        }
+    }
+    $all_extensions = array_keys($all_extensions);
+    sort($all_extensions, SORT_NATURAL | SORT_FLAG_CASE);
+    $all_php_versions = array_values(array_unique($all_php_versions));
+    $all_php_versions = sort_php_versions($all_php_versions);
+
+    echo "<section class=\"max-w-4xl mx-auto mt-6\">\n";
+    echo "  <h3 class=\"text-lg leading-6 font-medium text-gray-900\">" . htmlspecialchars($stack) . "</h3>\n";
+    echo "  <div class=\"mt-4 overflow-x-auto\">\n";
+    echo "    <table class=\"min-w-full divide-y divide-gray-200\">\n";
+    echo "      <thead class=\"bg-gray-50\"><tr><th class=\"px-3 py-2 text-left text-xs font-medium text-gray-500 uppercase tracking-wider\">PHP</th>";
+    foreach ($all_extensions as $ext) {
+        echo "<th class=\"px-3 py-2 text-left text-xs font-medium text-gray-500 uppercase tracking-wider\">" . htmlspecialchars($ext) . "</th>";
+    }
+    echo "</tr></thead>\n";
+    echo "      <tbody class=\"bg-white divide-y divide-gray-200\">\n";
+
+    foreach ($all_php_versions as $php_ver) {
+        echo "        <tr>\n";
+        echo "          <td class=\"px-3 py-2 text-sm text-gray-700\">" . htmlspecialchars($php_ver) . "</td>";
+        foreach ($all_extensions as $ext) {
+            $versions = $all_stacks[$stack][$php_ver][$ext] ?? [];
+            $cells = [];
+            foreach ($versions as $v) {
+                $cells[] = '<code class="text-xs bg-gray-100 px-2 py-1 rounded inline-block m-px">' . htmlspecialchars($v) . '</code>';
+            }
+            echo "<td class=\"px-3 py-2 text-sm text-gray-700\">" . implode(' ', $cells) . "</td>";
+        }
+        echo "</tr>\n";
+    }
+
+    echo "      </tbody>\n";
+    echo "    </table>\n";
+    echo "  </div>\n";
+    echo "</section>\n";
+}
+
+require __DIR__ . '/footer.phtml';