* @since 150422 Rewrite.
*
* @param string $buffer The buffer from {@link \ob_start()}.
* @param int $phase A set of bitmask flags.
*
* @throws \Exception If unable to handle output buffering for any reason.
*
* @return string|bool The output buffer, or `FALSE` to indicate no change.
*
* @attaches-to {@link \ob_start()}
*/
$self->outputBufferCallbackHandler = function ($buffer, $phase) use($self) {
if (!($phase & PHP_OUTPUT_HANDLER_END)) {
throw new \Exception(sprintf(__('Unexpected OB phase: `%1$s`.', 'zencache'), $phase));
}
AdvCacheBackCompat::quickCacheConstants();
$cache = trim((string) $buffer);
if (!isset($cache[0])) {
return false;
// Don't cache an empty buffer.
}
if (!isset($GLOBALS[GLOBAL_NS . '_shutdown_flag'])) {
return (bool) $self->maybeSetDebugInfo(NC_DEBUG_EARLY_BUFFER_TERMINATION);
}
if (defined('ZENCACHE_ALLOWED') && !ZENCACHE_ALLOWED) {
return (bool) $self->maybeSetDebugInfo(NC_DEBUG_ZENCACHE_ALLOWED_CONSTANT);
}
if (isset($_SERVER['ZENCACHE_ALLOWED']) && !$_SERVER['ZENCACHE_ALLOWED']) {
return (bool) $self->maybeSetDebugInfo(NC_DEBUG_ZENCACHE_ALLOWED_SERVER_VAR);
}
if (defined('DONOTCACHEPAGE')) {
}
} elseif (@(include_once dirname(COMET_CACHE_PLUGIN_FILE) . '/src/includes/stub.php') === false) {
return;
// Unable to find stub. Fail softly.
}
if (defined('WP_DEBUG') && WP_DEBUG) {
if (@(include_once dirname(COMET_CACHE_PLUGIN_FILE) . '/src/includes/functions/wp-cache-postload.php') === false) {
return;
// Unable to find postload function(s). Fail softly w/ PHP warning.
}
} elseif (@(include_once dirname(COMET_CACHE_PLUGIN_FILE) . '/src/includes/functions/wp-cache-postload.php') === false) {
return;
// Unable to find postload function(s). Fail softly.
}
AdvCacheBackCompat::zenCacheConstants();
AdvCacheBackCompat::zcRequestVars();
if (!defined('COMET_CACHE_PRO')) {
/**
* Comet Cache Pro flag.
*
* @since 140422 First documented version.
*
* @var string|integer|boolean A boolean-ish value; e.g. `1` or `0`.
*/
define('COMET_CACHE_PRO', IS_PRO);
}
if (!defined('COMET_CACHE_ENABLE')) {
/**
* Is Comet Cache enabled?
*
* @since 140422 First documented version.