diff --git a/ext/phar/phar.c b/ext/phar/phar.c
index c2184c58d843f..988ee41e7c3da 100644
--- a/ext/phar/phar.c
+++ b/ext/phar/phar.c
@@ -2373,7 +2373,7 @@ int phar_open_executed_filename(char *alias, size_t alias_len, char **error) /*
  */
 int phar_postprocess_file(phar_entry_data *idata, uint32_t crc32, char **error, int process_zip) /* {{{ */
 {
-	uint32_t crc = ~0;
+	uint32_t crc = php_crc32_bulk_init();
 	int len = idata->internal_file->uncompressed_filesize, ret;
 	php_stream *fp = idata->fp;
 	phar_entry_info *entry = idata->internal_file;
@@ -2439,11 +2439,11 @@ int phar_postprocess_file(phar_entry_data *idata, uint32_t crc32, char **error,
 
 	php_stream_seek(fp, idata->zero, SEEK_SET);
 
-	ret = crc32_stream_bulk_update(&crc, fp, len);
+	ret = php_crc32_stream_bulk_update(&crc, fp, len);
 
 	php_stream_seek(fp, idata->zero, SEEK_SET);
 
-	if (SUCCESS == ret && ~crc == crc32) {
+	if (SUCCESS == ret && php_crc32_bulk_end(crc) == crc32) {
 		entry->is_crc_checked = 1;
 		return SUCCESS;
 	} else {
@@ -2793,9 +2793,9 @@ int phar_flush(phar_archive_data *phar, char *user_stub, zend_long len, int conv
 			}
 			return EOF;
 		}
-		newcrc32 = ~0;
-		crc32_stream_bulk_update(&newcrc32, file, entry->uncompressed_filesize);
-		entry->crc32 = ~newcrc32;
+		newcrc32 = php_crc32_bulk_init();
+		php_crc32_stream_bulk_update(&newcrc32, file, entry->uncompressed_filesize);
+		entry->crc32 = php_crc32_bulk_end(newcrc32);
 		entry->is_crc_checked = 1;
 		if (!(entry->flags & PHAR_ENT_COMPRESSION_MASK)) {
 			/* not compressed */
diff --git a/ext/phar/zip.c b/ext/phar/zip.c
index 0b0d39c470f10..31d4bd2998215 100644
--- a/ext/phar/zip.c
+++ b/ext/phar/zip.c
@@ -851,10 +851,10 @@ static int phar_zip_changed_apply_int(phar_entry_info *entry, void *arg) /* {{{
 	PHAR_SET_16(perms.size, sizeof(perms) - 4);
 	PHAR_SET_16(perms.perms, entry->flags & PHAR_ENT_PERM_MASK);
 	{
-		uint32_t crc = (uint32_t) ~0;
+		uint32_t crc = (uint32_t) php_crc32_bulk_init();
 		CRC32(crc, perms.perms[0]);
 		CRC32(crc, perms.perms[1]);
-		PHAR_SET_32(perms.crc32, ~crc);
+		PHAR_SET_32(perms.crc32, php_crc32_bulk_end(crc));
 	}
 
 	if (entry->flags & PHAR_ENT_COMPRESSED_GZ) {
@@ -912,11 +912,11 @@ static int phar_zip_changed_apply_int(phar_entry_info *entry, void *arg) /* {{{
 		}
 
 		efp = phar_get_efp(entry, 0);
-		newcrc32 = ~0;
+		newcrc32 = php_crc32_bulk_init();
 
-		crc32_stream_bulk_update(&newcrc32, efp, entry->uncompressed_filesize);
+		php_crc32_stream_bulk_update(&newcrc32, efp, entry->uncompressed_filesize);
 
-		entry->crc32 = ~newcrc32;
+		entry->crc32 = php_crc32_bulk_end(newcrc32);
 		PHAR_SET_32(central.uncompsize, entry->uncompressed_filesize);
 		PHAR_SET_32(local.uncompsize, entry->uncompressed_filesize);
 
diff --git a/ext/standard/crc32.c b/ext/standard/crc32.c
index 8b4fa085058a3..92dce07db54ea 100644
--- a/ext/standard/crc32.c
+++ b/ext/standard/crc32.c
@@ -89,7 +89,7 @@ static uint32_t crc32_aarch64(uint32_t crc, char *p, size_t nr) {
 # endif
 #endif
 
-PHPAPI uint32_t crc32_bulk_update(uint32_t crc, const char *p, size_t nr)
+PHPAPI uint32_t php_crc32_bulk_update(uint32_t crc, const char *p, size_t nr)
 {
 #if HAVE_AARCH64_CRC32
 	if (has_crc32_insn()) {
@@ -112,7 +112,7 @@ PHPAPI uint32_t crc32_bulk_update(uint32_t crc, const char *p, size_t nr)
 	return crc;
 }
 
-PHPAPI int crc32_stream_bulk_update(uint32_t *crc, php_stream *fp, size_t nr)
+PHPAPI int php_crc32_stream_bulk_update(uint32_t *crc, php_stream *fp, size_t nr)
 {
 	size_t handled = 0, n;
 	char buf[1024];
@@ -123,7 +123,7 @@ PHPAPI int crc32_stream_bulk_update(uint32_t *crc, php_stream *fp, size_t nr)
 
 		n = php_stream_read(fp, buf, n);
 		if (n > 0) {
-			*crc = crc32_bulk_update(*crc, buf, n);
+			*crc = php_crc32_bulk_update(*crc, buf, n);
 			handled += n;
 		} else { /* EOF */
 			return FAILURE;
@@ -138,17 +138,14 @@ PHP_FUNCTION(crc32)
 {
 	char *p;
 	size_t nr;
-	uint32_t crcinit = 0;
-	uint32_t crc;
+	uint32_t crc = php_crc32_bulk_init();
 
 	ZEND_PARSE_PARAMETERS_START(1, 1)
 		Z_PARAM_STRING(p, nr)
 	ZEND_PARSE_PARAMETERS_END();
 
-	crc = crcinit^0xFFFFFFFF;
+	crc = php_crc32_bulk_update(crc, p, nr);
 
-	crc = crc32_bulk_update(crc, p, nr);
-
-	RETURN_LONG(crc^0xFFFFFFFF);
+	RETURN_LONG(php_crc32_bulk_end(crc));
 }
 /* }}} */
diff --git a/ext/standard/crc32.h b/ext/standard/crc32.h
index 1de234208aa9e..bdf45a4bef511 100644
--- a/ext/standard/crc32.h
+++ b/ext/standard/crc32.h
@@ -23,10 +23,13 @@
 
 #define CRC32(crc, ch)	 (crc = (crc >> 8) ^ crc32tab[(crc ^ (ch)) & 0xff])
 
-PHPAPI uint32_t crc32_bulk_update(uint32_t crc, const char *p, size_t nr);
+#define php_crc32_bulk_init() (0 ^ 0xffffffff)
+#define php_crc32_bulk_end(c) ((c) ^ 0xffffffff)
+
+PHPAPI uint32_t php_crc32_bulk_update(uint32_t crc, const char *p, size_t nr);
 
 /* Return FAILURE if stream reading fail */
-PHPAPI int crc32_stream_bulk_update(uint32_t *crc, php_stream *fp, size_t nr);
+PHPAPI int php_crc32_stream_bulk_update(uint32_t *crc, php_stream *fp, size_t nr);
 
 /* generated using the AUTODIN II polynomial
  *	x^32 + x^26 + x^23 + x^22 + x^16 +