| 1 |
<?php |
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|
| 3 |
if (!defined('ABSPATH')) { |
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exit; |
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} |
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|
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/** |
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* Static-identity probes that fingerprint the hosting platform: WHICH |
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* managed host (WP Engine, Kinsta, Pantheon, ...), WHICH control panel |
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* (cPanel, Plesk, RunCloud, ...), WHICH PHP execution stack (LSWS, |
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* mod_lsapi, FPM, mod_php, CGI), and WHICH CloudLinux markers are present. |
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* |
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* WHICH cache implementation owns the request caches is a different subject |
| 14 |
* with a different marker vocabulary, and it lives in |
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* ABJ_404_Solution_FeedbackEnvironmentExtras_CacheFingerprint. |
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* |
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* Distinct in kind from FeedbackEnvironmentExtras_HostProbes, which |
| 18 |
* answers dynamic runtime questions (how much disk is left, what is |
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* the open_basedir RIGHT NOW). Platform fingerprints answer "what is |
| 20 |
* this site permanently sitting on" -- the values rarely change for |
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* the life of the install and group reports the same way over time. |
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* |
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* Every detector here follows the same pattern: scan a table of |
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* distinctive markers (constants, env vars, paths, container and |
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* database-server identity), return the first match. Keeping those tables |
| 26 |
* together lets them evolve as a single editorial concern instead of |
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* being scattered. |
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* |
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* No PII: only matched marker keys are returned. SERVER_SOFTWARE is |
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* NOT echoed wholesale; it may include a hostname. |
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* |
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* Owned by ABJ_404_Solution_FeedbackEnvironmentExtras via composition; |
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* see that class's collect() method for the keyed probe registry that |
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* wraps each call below in recordProbe() for failure isolation. |
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*/ |
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class ABJ_404_Solution_FeedbackEnvironmentExtras_PlatformFingerprint { |
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|
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/** |
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* Best-effort hosting-class hint. Parses well-known markers from |
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* server_software + per-host environment vars + per-host PHP |
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* constants. Returns a small object so the server side can |
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* distinguish "WP Engine" from "Kinsta" without re-parsing strings. |
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* |
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* No PII: only matched markers are returned. server_software is NOT |
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* echoed wholesale; it may include a hostname. |
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* |
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* `$runtime` is an optional already-observed runtime snapshot. Production |
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* callers normally omit it; diagnostic tests and offline collectors can |
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* supply stable values without mutating process-wide PHP state. |
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* |
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* @param array{php_sapi?: mixed, loaded_extensions?: mixed, cloudlinux_alt_php_present?: mixed, |
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* env?: mixed, document_root?: mixed, abspath?: mixed, cgroup?: mixed, |
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* db_server_version?: mixed} $runtime |
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* @return array<string, mixed> |
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*/ |
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public function probeHostingClass(array $runtime = array()): array { |
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$out = array( |
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'host' => 'unknown', |
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'panel' => 'unknown', |
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'php_execution_stack' => 'unknown', |
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'cloudlinux_markers' => array(), |
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'matched_marker' => '', |
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); |
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$sw = ''; |
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if (isset($_SERVER['SERVER_SOFTWARE']) && is_scalar($_SERVER['SERVER_SOFTWARE'])) { |
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$sw = strtolower((string)$_SERVER['SERVER_SOFTWARE']); |
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} |
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$out['server_class'] = $this->classifyServerClass($sw); |
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|
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$phpSapi = isset($runtime['php_sapi']) && is_scalar($runtime['php_sapi']) |
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? strtolower(trim((string)$runtime['php_sapi'])) |
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: strtolower(PHP_SAPI); |
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$out['php_execution_stack'] = $this->classifyPhpExecutionStack( |
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(string)$out['server_class'], |
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$phpSapi |
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); |
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|
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$out['cloudlinux_markers'] = $this->collectCloudLinuxMarkers($runtime); |
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|
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$managedHost = $this->detectManagedHost($runtime); |
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if ($managedHost['host'] !== '') { |
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$out['host'] = $managedHost['host']; |
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$out['matched_marker'] = $managedHost['matched_marker']; |
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} |
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if ($out['host'] === 'unknown') { |
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$infrastructure = $this->detectInfrastructureHost($runtime); |
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if ($infrastructure['host'] !== '') { |
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$out['host'] = $infrastructure['host']; |
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$out['matched_marker'] = $infrastructure['matched_marker']; |
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} |
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} |
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if ($out['host'] === 'unknown' && $out['cloudlinux_markers'] !== array()) { |
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$out['host'] = 'cloudlinux'; |
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$out['matched_marker'] = (string)$out['cloudlinux_markers'][0]; |
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} |
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|
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$panel = $this->detectControlPanel($runtime); |
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if ($panel['panel'] !== '') { |
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$out['panel'] = $panel['panel']; |
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if ($out['matched_marker'] === '') { |
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$out['matched_marker'] = $panel['matched_marker']; |
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} |
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} |
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|
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return $out; |
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} |
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|
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/** |
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* Managed hosts that identify themselves outright, each through a |
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* distinctive PHP constant or environment variable. First match wins, so |
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* declaration order is precedence order. |
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* |
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* Azure App Service is in this table for the environment route |
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* (WEBSITE_SITE_NAME and friends, which App Service always injects into the |
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* container); the filesystem/cgroup/database routes that survive an FPM |
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* pool built with `clear_env = yes` are in INFRASTRUCTURE_HOST_MARKERS. |
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* |
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* @param array<string, mixed> $runtime |
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* @return array{host: string, matched_marker: string} Empty host when no marker matched. |
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*/ |
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private function detectManagedHost(array $runtime): array { |
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$managedHostChecks = array( |
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'wp_engine' => array('const' => array('WPE_APIKEY', 'WPE_PLUGIN_DIR'), 'env' => array('IS_WPE')), |
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'kinsta' => array('const' => array('KINSTA_CACHE_ZONE'), 'env' => array('KINSTA_SERVICE_NAME')), |
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'pantheon' => array('const' => array('PANTHEON_ENVIRONMENT'), 'env' => array('PANTHEON_ENVIRONMENT')), |
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'flywheel' => array('const' => array('FLYWHEEL_CONFIG_DIR', 'FLYWHEEL_PLUGIN_DIR'), 'env' => array()), |
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'pressable' => array('const' => array('PRESSABLE_VERSION'), 'env' => array()), |
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'siteground' => array('const' => array('SG_OPTIMIZER_VERSION'), 'env' => array()), |
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'wordpress_com' => array('const' => array('IS_ATOMIC', 'IS_WPCOM'), 'env' => array()), |
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'cloudways' => array('const' => array(), 'env' => array('cw_allowed_ip')), |
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'azure_app_service' => array('const' => array(), 'env' => array( |
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'WEBSITE_SITE_NAME', 'WEBSITE_INSTANCE_ID', 'APPSETTING_WEBSITE_SITE_NAME')), |
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); |
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foreach ($managedHostChecks as $hostKey => $checks) { |
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foreach ((array)$checks['const'] as $c) { |
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if (defined($c)) { |
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return array('host' => $hostKey, 'matched_marker' => 'const:' . $c); |
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} |
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} |
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foreach ((array)$checks['env'] as $e) { |
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if ($this->environmentValue($runtime, $e) !== null) { |
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return array('host' => $hostKey, 'matched_marker' => 'env:' . $e); |
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} |
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} |
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} |
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return array('host' => '', 'matched_marker' => ''); |
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} |
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|
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/** |
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* Control panels: cPanel / hPanel / Plesk / DirectAdmin / RunCloud / |
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* CloudPanel. Independent of the managed-host class: a cPanel site might |
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* also be on SiteGround. |
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* |
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* @param array<string, mixed> $runtime |
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* @return array{panel: string, matched_marker: string} Empty panel when no marker matched. |
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*/ |
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private function detectControlPanel(array $runtime): array { |
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$panelChecks = array( |
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'cpanel' => array('env' => array('CPANEL'), 'path' => array('/usr/local/cpanel')), |
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'hpanel' => array('env' => array('HOSTINGER'), 'path' => array('/usr/local/hostinger')), |
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'plesk' => array('env' => array('PLESK_ADMIN_PASSWORD'), 'path' => array('/usr/local/psa', '/opt/psa')), |
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'directadmin' => array('env' => array(), 'path' => array('/usr/local/directadmin')), |
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'runcloud' => array('env' => array(), 'path' => array('/etc/runcloud')), |
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'cloudpanel' => array('env' => array(), 'path' => array('/home/clp')), |
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); |
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foreach ($panelChecks as $panelKey => $checks) { |
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foreach ((array)$checks['env'] as $e) { |
| 168 |
if ($this->environmentValue($runtime, $e) !== null) { |
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return array('panel' => $panelKey, 'matched_marker' => 'env:' . $e); |
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} |
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} |
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foreach ((array)$checks['path'] as $p) { |
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// The panel-detection paths (/home/clp, /usr/local/cpanel, /opt/psa, |
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// /etc/runcloud, etc.) sit outside the open_basedir of most managed |
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// shared-hosting environments. is_dir() raises E_WARNING on every |
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// miss. The plugin's NormalErrorHandler reports those warnings |
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// (errfile is THIS file, which lives under the plugin folder), so |
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// the diagnostic that was supposed to be silent ends up in the |
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// admin error inbox as "ABJ404-SOLUTION Normal error handler error: |
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// errno: 2, errstr: is_dir(): open_basedir restriction in effect.". |
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// Suppress with @ since the probe is intentionally best-effort and |
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// a denial here means "not on this host", not a logic bug. |
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if (@is_dir($p)) { // allow-silent-error: open_basedir restriction surface; absence here is the answer, not a fault. See production reports 22-39 (4.1.18-4.1.19) flooding the inbox with "is_dir(): open_basedir restriction in effect" for /home/clp probes on p2p-game.com and similar CloudLinux-hosted sites. |
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return array('panel' => $panelKey, 'matched_marker' => 'path:' . $p); |
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} |
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} |
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} |
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return array('panel' => '', 'matched_marker' => ''); |
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} |
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|
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/** |
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* Platforms that publish no constant and cannot be relied on to publish an |
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* environment variable either, but that DO stamp themselves on three fixed, |
| 194 |
* non-identifying facts about the runtime: where the site is served from, |
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* which container hierarchy the worker sits in, and how the database server |
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* suffixes its own version string. |
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* |
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* Azure App Service for Linux is the case this table was built for. Support |
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* report 2026-08-27 (plugin 4.3.4) carried `/home/site/wwwroot`, an Antares |
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* cgroup path and `8.0.45-azure`, and still reported host="unknown", |
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* because an FPM pool with `clear_env = yes` (the App Service default for |
| 202 |
* some images) strips WEBSITE_SITE_NAME before PHP ever sees it. Any ONE of |
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* the three is sufficient, which is the point: this platform is only |
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* reliably named when the markers are checked independently. |
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* |
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* Marker KEYS only ever leave the site. The cgroup line and the App Service |
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* environment both embed the customer's own site name, so the matched |
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* needle is reported and the matched text never is. |
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* |
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* @var array<string, array{paths: array<int, string>, cgroup: array<int, string>, db_version: array<int, string>}> |
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*/ |
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private const INFRASTRUCTURE_HOST_MARKERS = array( |
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'azure_app_service' => array( |
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'paths' => array('/home/site/wwwroot'), |
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'cgroup' => array('antares'), |
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'db_version' => array('azure'), |
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), |
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); |
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|
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/** Ceiling on the cgroup read. The membership lines we match are in the first few. */ |
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private const MAX_CGROUP_BYTES = 4096; |
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|
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/** |
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* Name a platform from the fixed runtime markers in |
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* INFRASTRUCTURE_HOST_MARKERS, or report no match. |
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* |
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* Runs only after the constant/environment table above has come back |
| 228 |
* unknown, so a host that identifies itself explicitly keeps its own, |
| 229 |
* more specific marker. |
| 230 |
* |
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* @param array<string, mixed> $runtime |
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* @return array{host: string, matched_marker: string} |
| 233 |
*/ |
| 234 |
private function detectInfrastructureHost(array $runtime): array { |
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$documentRoot = $this->normalizedDirectory( |
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array_key_exists('document_root', $runtime) |
| 237 |
? $runtime['document_root'] |
| 238 |
: ($_SERVER['DOCUMENT_ROOT'] ?? '') |
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); |
| 240 |
$installPath = $this->normalizedDirectory( |
| 241 |
array_key_exists('abspath', $runtime) |
| 242 |
? $runtime['abspath'] |
| 243 |
: (defined('ABSPATH') ? ABSPATH : '') |
| 244 |
); |
| 245 |
$cgroup = array_key_exists('cgroup', $runtime) |
| 246 |
? (is_scalar($runtime['cgroup']) ? (string)$runtime['cgroup'] : '') |
| 247 |
: $this->readProcSelfCgroup(); |
| 248 |
$cgroup = strtolower($cgroup); |
| 249 |
$databaseVersion = strtolower( |
| 250 |
array_key_exists('db_server_version', $runtime) && is_scalar($runtime['db_server_version']) |
| 251 |
? (string)$runtime['db_server_version'] : '' |
| 252 |
); |
| 253 |
|
| 254 |
foreach (self::INFRASTRUCTURE_HOST_MARKERS as $hostKey => $markers) { |
| 255 |
foreach ($markers['paths'] as $markerPath) { |
| 256 |
if ($this->pathIsWithin(array('candidate' => $documentRoot, 'marker' => $markerPath)) |
| 257 |
|| $this->pathIsWithin(array('candidate' => $installPath, 'marker' => $markerPath))) { |
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return array('host' => $hostKey, 'matched_marker' => 'path:' . $markerPath); |
| 259 |
} |
| 260 |
} |
| 261 |
foreach ($markers['cgroup'] as $needle) { |
| 262 |
// Bounded by the path separators on both sides so a customer |
| 263 |
// site literally named "antares" cannot match as the platform. |
| 264 |
if ($cgroup !== '' && strpos($cgroup, '/' . $needle . '/') !== false) { |
| 265 |
return array('host' => $hostKey, 'matched_marker' => 'cgroup:' . $needle); |
| 266 |
} |
| 267 |
} |
| 268 |
foreach ($markers['db_version'] as $needle) { |
| 269 |
// The vendor suffix, not a substring: "8.0.45-azure" matches and |
| 270 |
// a server hosted at azure.example.com does not. |
| 271 |
if ($databaseVersion !== '' && strpos($databaseVersion, '-' . $needle) !== false) { |
| 272 |
return array('host' => $hostKey, 'matched_marker' => 'db_version:' . $needle); |
| 273 |
} |
| 274 |
} |
| 275 |
} |
| 276 |
return array('host' => '', 'matched_marker' => ''); |
| 277 |
} |
| 278 |
|
| 279 |
/** |
| 280 |
* One environment variable, read from the injected snapshot when the caller |
| 281 |
* supplied one and from the process otherwise. Null means "not set". |
| 282 |
* |
| 283 |
* An injected `env` array is authoritative even when empty: a test or an |
| 284 |
* offline collector that declares the environment has to be able to declare |
| 285 |
* it EMPTY, or the negative control silently reads the developer's own shell. |
| 286 |
* |
| 287 |
* @param array<string, mixed> $runtime |
| 288 |
*/ |
| 289 |
private function environmentValue(array $runtime, string $name): ?string { |
| 290 |
if (array_key_exists('env', $runtime)) { |
| 291 |
$environment = is_array($runtime['env']) ? $runtime['env'] : array(); |
| 292 |
return array_key_exists($name, $environment) && is_scalar($environment[$name]) |
| 293 |
? (string)$environment[$name] : null; |
| 294 |
} |
| 295 |
$value = getenv($name); |
| 296 |
return $value === false ? null : (string)$value; |
| 297 |
} |
| 298 |
|
| 299 |
/** |
| 300 |
* The worker's cgroup membership text, or '' when this platform has no |
| 301 |
* procfs (macOS, Windows, a hardened open_basedir). |
| 302 |
*/ |
| 303 |
private function readProcSelfCgroup(): string { |
| 304 |
$path = '/proc/self/cgroup'; |
| 305 |
if (!@is_readable($path)) { // allow-silent-error: procfs is absent on non-Linux hosts and outside many open_basedir roots; absence is the answer, not a fault. |
| 306 |
return ''; |
| 307 |
} |
| 308 |
$raw = @file_get_contents($path, false, null, 0, self::MAX_CGROUP_BYTES); // allow-silent-error: a readable-but-unreadable procfs entry means the marker is unavailable, which is the same finding as absence. |
| 309 |
return is_string($raw) ? $raw : ''; |
| 310 |
} |
| 311 |
|
| 312 |
/** |
| 313 |
* A directory path with any trailing separator removed, so |
| 314 |
* `/home/site/wwwroot/` and `/home/site/wwwroot` compare equal. |
| 315 |
* |
| 316 |
* @param mixed $value |
| 317 |
*/ |
| 318 |
private function normalizedDirectory($value): string { |
| 319 |
$path = is_scalar($value) ? (string)$value : ''; |
| 320 |
return $path === '' ? '' : rtrim($path, '/\\'); |
| 321 |
} |
| 322 |
|
| 323 |
/** |
| 324 |
* Is the site's directory the platform marker directory itself, or |
| 325 |
* something inside it? |
| 326 |
* |
| 327 |
* Keyed rather than positional: `candidate` and `marker` are both |
| 328 |
* directory strings, so transposing them is type-correct and silently |
| 329 |
* inverts the question into "does the platform's marker directory live |
| 330 |
* inside this site?", which is false on every real host. Platform |
| 331 |
* detection would simply stop matching, with nothing logged and no test |
| 332 |
* failing unless one happened to cover this exact pair. Shipped code has |
| 333 |
* a PHP 7.4 floor, so named arguments are not available here; the keyed |
| 334 |
* bag is what makes the swap unwriteable. |
| 335 |
* |
| 336 |
* @param array{candidate: string, marker: string} $probe |
| 337 |
*/ |
| 338 |
private function pathIsWithin(array $probe): bool { |
| 339 |
$candidate = $probe['candidate']; |
| 340 |
$marker = $probe['marker']; |
| 341 |
return $candidate !== '' && ($candidate === $marker || strpos($candidate, $marker . '/') === 0); |
| 342 |
} |
| 343 |
|
| 344 |
/** |
| 345 |
* Reduce SERVER_SOFTWARE to a bounded server product without returning |
| 346 |
* versions or hostnames that may appear in the raw value. |
| 347 |
* |
| 348 |
* @param string $serverSoftware Lowercased SERVER_SOFTWARE value. |
| 349 |
* @return string |
| 350 |
*/ |
| 351 |
private function classifyServerClass(string $serverSoftware): string { |
| 352 |
if (strpos($serverSoftware, 'apache') !== false) { |
| 353 |
return 'apache'; |
| 354 |
} |
| 355 |
if (strpos($serverSoftware, 'nginx') !== false) { |
| 356 |
return 'nginx'; |
| 357 |
} |
| 358 |
if (strpos($serverSoftware, 'litespeed') !== false) { |
| 359 |
return 'litespeed'; |
| 360 |
} |
| 361 |
if (strpos($serverSoftware, 'iis') !== false) { |
| 362 |
return 'iis'; |
| 363 |
} |
| 364 |
return $serverSoftware === '' ? 'unknown' : 'other'; |
| 365 |
} |
| 366 |
|
| 367 |
/** |
| 368 |
* Collect only the fixed, non-identifying CloudLinux markers used by |
| 369 |
* support diagnostics. |
| 370 |
* |
| 371 |
* @param array{loaded_extensions?: mixed, cloudlinux_alt_php_present?: mixed} $runtime |
| 372 |
* @return array<int, string> |
| 373 |
*/ |
| 374 |
private function collectCloudLinuxMarkers(array $runtime): array { |
| 375 |
$loadedExtensions = array_key_exists('loaded_extensions', $runtime) |
| 376 |
? $runtime['loaded_extensions'] |
| 377 |
: get_loaded_extensions(); |
| 378 |
$extensionNames = array(); |
| 379 |
if (is_array($loadedExtensions)) { |
| 380 |
foreach ($loadedExtensions as $extensionName) { |
| 381 |
if (is_scalar($extensionName)) { |
| 382 |
$extensionNames[strtolower((string)$extensionName)] = true; |
| 383 |
} |
| 384 |
} |
| 385 |
} |
| 386 |
|
| 387 |
$markers = array(); |
| 388 |
foreach (array('xray', 'clos_ssa') as $cloudLinuxExtension) { |
| 389 |
if (isset($extensionNames[$cloudLinuxExtension])) { |
| 390 |
$markers[] = 'extension:' . $cloudLinuxExtension; |
| 391 |
} |
| 392 |
} |
| 393 |
$altPhpPresent = array_key_exists('cloudlinux_alt_php_present', $runtime) |
| 394 |
? $runtime['cloudlinux_alt_php_present'] === true |
| 395 |
: @is_dir('/opt/alt/php'); // allow-silent-error: CloudLinux's alt-PHP directory is outside many open_basedir roots; denial means the marker is unavailable. |
| 396 |
if ($altPhpPresent) { |
| 397 |
// Report the marker name, never the absolute path that was probed. |
| 398 |
$markers[] = 'alt_php'; |
| 399 |
} |
| 400 |
|
| 401 |
return $markers; |
| 402 |
} |
| 403 |
|
| 404 |
/** |
| 405 |
* Identify the request's PHP execution product from the webserver and |
| 406 |
* SAPI pair. In particular, Apache + the `litespeed` SAPI is mod_lsapi, |
| 407 |
* not LiteSpeed Web Server. |
| 408 |
* |
| 409 |
* @param string $serverClass |
| 410 |
* @param string $phpSapi |
| 411 |
* @return string |
| 412 |
*/ |
| 413 |
private function classifyPhpExecutionStack(string $serverClass, string $phpSapi): string { |
| 414 |
if ($phpSapi === 'litespeed') { |
| 415 |
return $serverClass === 'apache' ? 'mod_lsapi' : 'lsws'; |
| 416 |
} |
| 417 |
if (strpos($phpSapi, 'fpm') !== false) { |
| 418 |
return 'fpm'; |
| 419 |
} |
| 420 |
if ($phpSapi === 'apache2handler' || $phpSapi === 'apache') { |
| 421 |
return 'mod_php'; |
| 422 |
} |
| 423 |
if ($phpSapi === 'cgi' || $phpSapi === 'cgi-fcgi') { |
| 424 |
return 'cgi'; |
| 425 |
} |
| 426 |
return 'unknown'; |
| 427 |
} |
| 428 |
} |
| 429 |
|
