WinCacheClassLoader.php
public function findFile($class)
    {
        $file = wincache_ucache_get($this->prefix.$class, $success);

        if (!$success) {
            wincache_ucache_set($this->prefix.$class, $file = $this->decorated->findFile($class) ?: null, 0);
        }

        return $file;
    }
public function findFile($class)
    {
        $file = wincache_ucache_get($this->prefix.$class, $success);

        if (!$success) {
            wincache_ucache_set($this->prefix.$class, $file = $this->decorated->findFile($class) ?: null, 0);
        }

        return $file;
    }
Finds a file by class name while caching lookups to WinCache.

@param string $class A class name to resolve to file

@return string|null