diff --git a/php-fastcommon/fastcommon.c b/php-fastcommon/fastcommon.c
index 8ea9388..92d2853 100644
--- a/php-fastcommon/fastcommon.c
+++ b/php-fastcommon/fastcommon.c
@@ -119,12 +119,29 @@ ZEND_RSRC_DTOR_FUNC(id_generator_dtor)
 
 }
 
+#define FASTCOMMON_REGISTER_CHAR_STR_CONSTANT(key, c, buff) \
+    *(buff) = c;   \
+    REGISTER_STRING_CONSTANT(key, buff, CONST_CS | CONST_PERSISTENT)
+
 PHP_MINIT_FUNCTION(fastcommon)
 {
-	log_init();
+    static char buff[16];
+
+    log_init();
     le_consumer = zend_register_list_destructors_ex(id_generator_dtor, NULL,
             PHP_IDG_RESOURCE_NAME, module_number);
-	return SUCCESS;
+
+    memset(buff, 0, sizeof(buff));
+    FASTCOMMON_REGISTER_CHAR_STR_CONSTANT("FASTCOMMON_LOG_TIME_PRECISION_SECOND",
+            LOG_TIME_PRECISION_SECOND, buff);
+    FASTCOMMON_REGISTER_CHAR_STR_CONSTANT("FASTCOMMON_LOG_TIME_PRECISION_MSECOND",
+            LOG_TIME_PRECISION_MSECOND, buff + 2);
+    FASTCOMMON_REGISTER_CHAR_STR_CONSTANT("FASTCOMMON_LOG_TIME_PRECISION_USECOND",
+            LOG_TIME_PRECISION_USECOND, buff + 4);
+    FASTCOMMON_REGISTER_CHAR_STR_CONSTANT("FASTCOMMON_LOG_TIME_PRECISION_NONE",
+            LOG_TIME_PRECISION_NONE, buff + 6);
+
+    return SUCCESS;
 }
 
 PHP_MSHUTDOWN_FUNCTION(fastcommon)
@@ -835,7 +852,7 @@ static LogContext *fetch_logger_context(const char *filename)
     return NULL;
 }
 
-static LogContext *alloc_logger_context(const char *filename)
+static LogContext *alloc_logger_context(const char *filename, const int time_precision)
 {
     LogContext *ctx;
     if (logger_array.alloc <= logger_array.count) {
@@ -868,19 +885,20 @@ static LogContext *alloc_logger_context(const char *filename)
     if (log_set_filename_ex(ctx, filename) != 0) {
         return NULL;
     }
+    log_set_time_precision(ctx, time_precision);
 
     logger_array.count++;
     return ctx;
 }
 
-static LogContext *get_logger_context(const char *filename)
+static LogContext *get_logger_context(const char *filename, const int time_precision)
 {
     LogContext *ctx;
     if ((ctx=fetch_logger_context(filename)) != NULL) {
         return ctx;
     }
 
-    return alloc_logger_context(filename);
+    return alloc_logger_context(filename, time_precision);
 }
 
 #define _INIT_ZSTRING(z, s, len) \
@@ -933,7 +951,15 @@ ZEND_FUNCTION(fastcommon_error_log)
 
     if (message_type == 3 && filename != NULL) {
         LogContext *ctx;
-        if ((ctx=get_logger_context(filename)) != NULL) {
+        int time_precision;
+
+        if (extra_headers == NULL) {
+            time_precision = LOG_TIME_PRECISION_NONE;
+        } else {
+            time_precision = extra_headers[0];
+        }
+
+        if ((ctx=get_logger_context(filename, time_precision)) != NULL) {
             if (msg_len > 0 && message[msg_len - 1] == '\n') {
                 --msg_len;
             }
diff --git a/php-fastcommon/php-fastcommon.spec.in b/php-fastcommon/php-fastcommon.spec.in
index f12c97f..13e8680 100644
--- a/php-fastcommon/php-fastcommon.spec.in
+++ b/php-fastcommon/php-fastcommon.spec.in
@@ -11,8 +11,8 @@ Source: https://github.com/happyfish100/libfastcommon/%{name}-%{version}.tar.gz
 
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n) 
 
-BuildRequires: libfastcommon-devel >= 1.0.30
-Requires: libfastcommon >= 1.0.30
+BuildRequires: libfastcommon-devel >= 1.0.34
+Requires: libfastcommon >= 1.0.34
 
 %description
 This package provides the php extension for libfastcommon
diff --git a/php-fastcommon/test.php b/php-fastcommon/test.php
index cf25c12..d05d515 100644
--- a/php-fastcommon/test.php
+++ b/php-fastcommon/test.php
@@ -63,10 +63,10 @@ fastcommon_id_generator_destroy($handle1);
 fastcommon_id_generator_destroy($handle2);
 
 fastcommon_error_log("this is a test\n", 3, "/tmp/test.log");
-fastcommon_error_log("this is a test11\n", 3, "/tmp/test1.log");
-fastcommon_error_log("this is a test12\n", 3, "/tmp/test1.log");
-fastcommon_error_log("this is a test21\n", 3, "/tmp/test2.log");
-fastcommon_error_log("this is a test22\n", 3, "/tmp/test2.log");
-fastcommon_error_log("this is a test31\n", 3, "/tmp/test3.log");
-fastcommon_error_log("this is a test32\n", 3, "/tmp/test3.log");
-fastcommon_error_log("this is a test33\n", 3, "/tmp/test3.log");
+fastcommon_error_log("this is a test11\n", 3, "/tmp/test1.log", FASTCOMMON_LOG_TIME_PRECISION_MSECOND);
+fastcommon_error_log("this is a test12\n", 3, "/tmp/test1.log", FASTCOMMON_LOG_TIME_PRECISION_MSECOND);
+fastcommon_error_log("this is a test21\n", 3, "/tmp/test2.log", FASTCOMMON_LOG_TIME_PRECISION_USECOND);
+fastcommon_error_log("this is a test22\n", 3, "/tmp/test2.log", FASTCOMMON_LOG_TIME_PRECISION_USECOND);
+fastcommon_error_log("this is a test31\n", 3, "/tmp/test3.log", FASTCOMMON_LOG_TIME_PRECISION_SECOND);
+fastcommon_error_log("this is a test32\n", 3, "/tmp/test3.log", FASTCOMMON_LOG_TIME_PRECISION_SECOND);
+fastcommon_error_log("this is a test33\n", 3, "/tmp/test3.log", FASTCOMMON_LOG_TIME_PRECISION_SECOND);
diff --git a/src/logger.c b/src/logger.c
index 5c9e2b8..0f8a6b8 100644
--- a/src/logger.c
+++ b/src/logger.c
@@ -940,7 +940,8 @@ static void doLogEx(LogContext *pContext, struct timeval *tv, \
 	int buff_len;
 	int result;
 
-	if (pContext->time_precision == LOG_TIME_PRECISION_SECOND)
+	if ((pContext->time_precision == LOG_TIME_PRECISION_SECOND)
+            || (pContext->time_precision == LOG_TIME_PRECISION_NONE))
 	{
 		time_fragment = 0;
 	}
@@ -956,7 +957,6 @@ static void doLogEx(LogContext *pContext, struct timeval *tv, \
 		}
 	}
 
-	localtime_r(&tv->tv_sec, &tm);
 	if (bNeedLock && (result=pthread_mutex_lock(&pContext->log_thread_lock)) != 0)
 	{
 		fprintf(stderr, "file: "__FILE__", line: %d, " \
@@ -983,21 +983,25 @@ static void doLogEx(LogContext *pContext, struct timeval *tv, \
 		log_fsync(pContext, false);
 	}
 
-	if (pContext->time_precision == LOG_TIME_PRECISION_SECOND)
-	{
-		buff_len = sprintf(pContext->pcurrent_buff, \
-			"[%04d-%02d-%02d %02d:%02d:%02d] ", \
-			tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday, \
-			tm.tm_hour, tm.tm_min, tm.tm_sec);
-	}
-	else
-	{
-		buff_len = sprintf(pContext->pcurrent_buff, \
-			"[%04d-%02d-%02d %02d:%02d:%02d.%03d] ", \
-			tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday, \
-			tm.tm_hour, tm.tm_min, tm.tm_sec, time_fragment);
-	}
-	pContext->pcurrent_buff += buff_len;
+    if (pContext->time_precision != LOG_TIME_PRECISION_NONE)
+    {
+        localtime_r(&tv->tv_sec, &tm);
+        if (pContext->time_precision == LOG_TIME_PRECISION_SECOND)
+        {
+            buff_len = sprintf(pContext->pcurrent_buff, \
+                    "[%04d-%02d-%02d %02d:%02d:%02d] ", \
+                    tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday, \
+                    tm.tm_hour, tm.tm_min, tm.tm_sec);
+        }
+        else
+        {
+            buff_len = sprintf(pContext->pcurrent_buff, \
+                    "[%04d-%02d-%02d %02d:%02d:%02d.%03d] ", \
+                    tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday, \
+                    tm.tm_hour, tm.tm_min, tm.tm_sec, time_fragment);
+        }
+        pContext->pcurrent_buff += buff_len;
+    }
 
 	if (caption != NULL)
 	{
@@ -1033,7 +1037,7 @@ void log_it_ex2(LogContext *pContext, const char *caption, \
 		tv.tv_sec = get_current_time();
 		tv.tv_usec = 0;
 	}
-	else
+	else if (pContext->time_precision != LOG_TIME_PRECISION_NONE)
 	{
 		gettimeofday(&tv, NULL);
 	}
diff --git a/src/logger.h b/src/logger.h
index de6d97f..d227095 100644
--- a/src/logger.h
+++ b/src/logger.h
@@ -21,7 +21,8 @@ extern "C" {
 //log time precision
 #define LOG_TIME_PRECISION_SECOND	's'  //second
 #define LOG_TIME_PRECISION_MSECOND	'm'  //millisecond
-#define LOG_TIME_PRECISION_USSECOND	'u'  //microsecond
+#define LOG_TIME_PRECISION_USECOND	'u'  //microsecond
+#define LOG_TIME_PRECISION_NONE 	'0'  //do NOT output timestamp
 
 //log compress flags
 #define LOG_COMPRESS_FLAGS_NONE       0