hphp/runtime/base/apc-stats.h
// A new key is added. Value is added through addAPCValue()
A new key is added. Value is added through addAPCValue()
A new key is added . Value is added through addAPCValue ()
void addKey(size_t len) {
    assert(len > 0);
    m_entries->increment();
    m_keySize->addValue(len);
  }
void addKey ( size_t len ) { assert ( len > 0 ) ; m_entries -> increment ( ) ; m_keySize -> addValue ( len ) ; }
A new key is added.
A new key is added .