usleep 2675 ext/pdo_sqlite/sqlite/src/os_unix.c usleep(ms*1000); usleep 1680 ext/sqlite/libsqlite/src/os.c usleep(ms*1000); usleep 3109 ext/standard/basic_functions.c PHP_FE(usleep, arginfo_usleep) usleep 4794 ext/standard/basic_functions.c usleep(num); usleep 67 ext/standard/uniqid.c usleep(1); usleep 3 win32/unistd.h void usleep(unsigned int useconds);