diff --git a/ext/bz2/bz2_filter.c b/ext/bz2/bz2_filter.c
index 5ed7921c17d..335600232b3 100644
--- a/ext/bz2/bz2_filter.c
+++ b/ext/bz2/bz2_filter.c
@@ -215,7 +215,6 @@ static php_stream_filter_status_t php_bz2_compress_filter(
 	size_t consumed = 0;
 	int status;
 	php_stream_filter_status_t exit_status = PSFS_FEED_ME;
-	bz_stream *streamp;
 
 	if (!thisfilter || !thisfilter->abstract) {
 		/* Should never happen */
@@ -223,7 +222,6 @@ static php_stream_filter_status_t php_bz2_compress_filter(
 	}
 
 	data = (php_bz2_filter_data *)(thisfilter->abstract);
-	streamp = &(data->strm);
 
 	while (buckets_in->head) {
 		size_t bin = 0, desired;
diff --git a/ext/curl/interface.c b/ext/curl/interface.c
index a1c8a1e520c..ac872dfbc2c 100644
--- a/ext/curl/interface.c
+++ b/ext/curl/interface.c
@@ -2441,7 +2441,7 @@ string_copy:
 
 			ph = HASH_OF(*zvalue);
 			if (!ph) {
-				char *name;
+				char *name = NULL;
 				switch (option) {
 					case CURLOPT_HTTPHEADER:
 						name = "CURLOPT_HTTPHEADER";
diff --git a/ext/ftp/ftp.c b/ext/ftp/ftp.c
index 0d6704f9d21..2c5bc5d7e39 100644
--- a/ext/ftp/ftp.c
+++ b/ext/ftp/ftp.c
@@ -790,7 +790,6 @@ int
 ftp_get(ftpbuf_t *ftp, php_stream *outstream, const char *path, ftptype_t type, long resumepos TSRMLS_DC)
 {
 	databuf_t		*data = NULL;
-	int			lastch;
 	size_t			rcvd;
 	char			arg[11];
 
@@ -828,7 +827,6 @@ ftp_get(ftpbuf_t *ftp, php_stream *outstream, const char *path, ftptype_t type,
 		goto bail;
 	}
 
-	lastch = 0;
 	while ((rcvd = my_recv(ftp, data->fd, data->buf, FTP_BUFSIZE))) {
 		if (rcvd == -1) {
 			goto bail;
@@ -1187,12 +1185,9 @@ ftp_readline(ftpbuf_t *ftp)
 int
 ftp_getresp(ftpbuf_t *ftp)
 {
-	char *buf;
-
 	if (ftp == NULL) {
 		return 0;
 	}
-	buf = ftp->inbuf;
 	ftp->resp = 0;
 
 	while (1) {
diff --git a/ext/intl/calendar/calendar_methods.cpp b/ext/intl/calendar/calendar_methods.cpp
index db10502a183..ae7d0093f78 100644
--- a/ext/intl/calendar/calendar_methods.cpp
+++ b/ext/intl/calendar/calendar_methods.cpp
@@ -184,7 +184,6 @@ U_CFUNC PHP_FUNCTION(intlcal_get_keyword_values_for_locale)
 
 U_CFUNC PHP_FUNCTION(intlcal_get_now)
 {
-	UErrorCode	status			= U_ZERO_ERROR;
 	intl_error_reset(NULL TSRMLS_CC);
 
 	if (zend_parse_parameters_none() == FAILURE) {
diff --git a/ext/intl/calendar/gregoriancalendar_methods.cpp b/ext/intl/calendar/gregoriancalendar_methods.cpp
index 3c05253de1e..08b894964c9 100644
--- a/ext/intl/calendar/gregoriancalendar_methods.cpp
+++ b/ext/intl/calendar/gregoriancalendar_methods.cpp
@@ -38,7 +38,6 @@ static inline GregorianCalendar *fetch_greg(Calendar_object *co) {
 
 static void _php_intlgregcal_constructor_body(INTERNAL_FUNCTION_PARAMETERS)
 {
-	zval		*object		= getThis();
 	zval		**tz_object	= NULL;
 	zval		**args_a[6] = {0},
 				***args		= &args_a[0];
@@ -84,7 +83,7 @@ static void _php_intlgregcal_constructor_body(INTERNAL_FUNCTION_PARAMETERS)
 	}
 	
 	// instantion of ICU object
-	GregorianCalendar *gcal;
+	GregorianCalendar *gcal = NULL;
 
 	if (variant <= 2) {
 		// From timezone and locale (0 to 2 arguments)
diff --git a/ext/intl/msgformat/msgformat_helpers.cpp b/ext/intl/msgformat/msgformat_helpers.cpp
index 9ee1cdcfb0d..c4456d54f3c 100644
--- a/ext/intl/msgformat/msgformat_helpers.cpp
+++ b/ext/intl/msgformat/msgformat_helpers.cpp
@@ -487,7 +487,7 @@ U_CFUNC void umsg_format_helper(MessageFormatter_object *mfo,
 				}
 			case Formattable::kLong:
 				{
-					int32_t tInt32;
+					int32_t tInt32 = 0;
 retry_klong:
 					if (Z_TYPE_PP(elem) == IS_DOUBLE) {
 						if (Z_DVAL_PP(elem) > (double)INT32_MAX ||
@@ -517,7 +517,7 @@ retry_klong:
 				}
 			case Formattable::kInt64:
 				{
-					int64_t tInt64;
+					int64_t tInt64 = 0;
 retry_kint64:
 					if (Z_TYPE_PP(elem) == IS_DOUBLE) {
 						if (Z_DVAL_PP(elem) > (double)U_INT64_MAX ||
diff --git a/ext/intl/resourcebundle/resourcebundle_class.c b/ext/intl/resourcebundle/resourcebundle_class.c
index 9c369bdecc4..dc1212431a9 100644
--- a/ext/intl/resourcebundle/resourcebundle_class.c
+++ b/ext/intl/resourcebundle/resourcebundle_class.c
@@ -163,7 +163,6 @@ static void resourcebundle_array_fetch(zval *object, zval *offset, zval *return_
 {
 	int32_t     meindex = 0;
 	char *      mekey = NULL;
-	long        mekeylen;
     zend_bool    is_numeric = 0;
 	char         *pbuf;
 	ResourceBundle_object *rb;
@@ -177,7 +176,6 @@ static void resourcebundle_array_fetch(zval *object, zval *offset, zval *return_
 		rb->child = ures_getByIndex( rb->me, meindex, rb->child, &INTL_DATA_ERROR_CODE(rb) );
 	} else if(Z_TYPE_P(offset) == IS_STRING) {
 		mekey = Z_STRVAL_P(offset);
-		mekeylen = Z_STRLEN_P(offset);
 		rb->child = ures_getByKey(rb->me, mekey, rb->child, &INTL_DATA_ERROR_CODE(rb) );
 	} else {
 		intl_errors_set(INTL_DATA_ERROR_P(rb), U_ILLEGAL_ARGUMENT_ERROR,	
diff --git a/ext/openssl/openssl.c b/ext/openssl/openssl.c
index 578f738da99..4aac4e3137c 100644
--- a/ext/openssl/openssl.c
+++ b/ext/openssl/openssl.c
@@ -600,7 +600,7 @@ static void add_assoc_name_entry(zval * val, char * key, X509_NAME * name, int s
 {
 	zval **data;
 	zval *subitem, *subentries;
-	int i, j = -1, last = -1, obj_cnt = 0;
+	int i;
 	char *sname;
 	int nid;
 	X509_NAME_ENTRY * ne;
@@ -622,7 +622,6 @@ static void add_assoc_name_entry(zval * val, char * key, X509_NAME * name, int s
 		ne  = X509_NAME_get_entry(name, i);
 		obj = X509_NAME_ENTRY_get_object(ne);
 		nid = OBJ_obj2nid(obj);
-		obj_cnt = 0;
 
 		if (shortname) {
 			sname = (char *) OBJ_nid2sn(nid);