add zend_memcpy

Author: LamentXU123

Zend/zend_string.h

@@ -22,7 +22,6 @@
 #include "zend_types.h"
 #include "zend_gc.h"
 #include "zend_alloc.h"
-#include "zend_operators.h"
 
 BEGIN_EXTERN_C()
 
@@ -126,6 +125,10 @@ END_EXTERN_C()
 
 #define ZSTR_INIT_LITERAL(s, persistent) (zend_string_init(("" s), sizeof(s) - 1, (persistent)))
 
+#ifndef ZEND_STRING_H
+#define ZEND_STRING_H
+
+static zend_always_inline void *zend_mempcpy(void *dest, const void *src, size_t n);
 /*---*/
 
 static zend_always_inline zend_ulong zend_string_hash_val(zend_string *s)