diff --git a/Lib/php/php.swg b/Lib/php/php.swg
index bf388a75a..ffcffde70 100644
--- a/Lib/php/php.swg
+++ b/Lib/php/php.swg
@@ -240,9 +240,7 @@
   if ((long long)LONG_MIN <= $1 && $1 <= (long long)LONG_MAX) {
     RETVAL_LONG((long)($1));
   } else {
-    char temp[256];
-    sprintf(temp, "%lld", (long long)$1);
-    RETVAL_STRING(temp);
+    RETVAL_NEW_STR(zend_strpprintf(0, "%lld", (long long)$1));
   }
 %}
 %typemap(out, phptype="int|string") unsigned long long
@@ -250,9 +248,7 @@
   if ($1 <= (unsigned long long)LONG_MAX) {
     RETVAL_LONG((long)($1));
   } else {
-    char temp[256];
-    sprintf(temp, "%llu", (unsigned long long)$1);
-    RETVAL_STRING(temp);
+    RETVAL_NEW_STR(zend_strpprintf(0, "%llu", (unsigned long long)$1));
   }
 %}
 
@@ -286,9 +282,7 @@
   if ((long long)LONG_MIN <= *$1 && *$1 <= (long long)LONG_MAX) {
     RETVAL_LONG((long)(*$1));
   } else {
-    char temp[256];
-    sprintf(temp, "%lld", (long long)(*$1));
-    RETVAL_STRING(temp);
+    RETVAL_NEW_STR(zend_strpprintf(0, "%lld", (long long)(*$1)));
   }
 %}
 %typemap(out, phptype="int|string") const unsigned long long &
@@ -296,9 +290,7 @@
   if (*$1 <= (unsigned long long)LONG_MAX) {
     RETVAL_LONG((long)(*$1));
   } else {
-    char temp[256];
-    sprintf(temp, "%llu", (unsigned long long)(*$1));
-    RETVAL_STRING(temp);
+    RETVAL_NEW_STR(zend_strpprintf(0, "%llu", (unsigned long long)(*$1)));
   }
 %}
 
diff --git a/Lib/php/typemaps.i b/Lib/php/typemaps.i
index 321b1202c..2f7819097 100644
--- a/Lib/php/typemaps.i
+++ b/Lib/php/typemaps.i
@@ -122,9 +122,7 @@ INT_TYPEMAP(long long);
   if ((long long)LONG_MIN <= temp$argnum && temp$argnum <= (long long)LONG_MAX) {
     ZVAL_LONG(&o, (long)temp$argnum);
   } else {
-    char temp[256];
-    sprintf(temp, "%lld", (long long)temp$argnum);
-    ZVAL_STRING(&o, temp);
+    ZVAL_NEW_STR(&o, zend_strpprintf(0, "%lld", (long long)temp$argnum));
   }
   t_output_helper($result, &o);
 }
@@ -138,9 +136,7 @@ INT_TYPEMAP(long long);
   if ((long long)LONG_MIN <= lvalue$argnum && lvalue$argnum <= (long long)LONG_MAX) {
     ZVAL_LONG(&$arg, (long)temp$argnum);
   } else {
-    char temp[256];
-    sprintf(temp, "%lld", (long long)lvalue$argnum);
-    ZVAL_STRING(&$arg, temp);
+    ZVAL_NEW_STR(&$arg, zend_strpprintf(0, "%lld", (long long)lvalue$argnum));
   }
 %}
 %typemap(argout) long long &OUTPUT
@@ -148,9 +144,7 @@ INT_TYPEMAP(long long);
   if ((long long)LONG_MIN <= *arg$argnum && *arg$argnum <= (long long)LONG_MAX) {
     ZVAL_LONG($result, (long)(*arg$argnum));
   } else {
-    char temp[256];
-    sprintf(temp, "%lld", (long long)(*arg$argnum));
-    ZVAL_STRING($result, temp);
+    ZVAL_NEW_STR($result, zend_strpprintf(0, "%lld", (long long)(*arg$argnum)));
   }
 %}
 
@@ -161,9 +155,7 @@ INT_TYPEMAP(unsigned long long);
   if (temp$argnum <= (unsigned long long)LONG_MAX) {
     ZVAL_LONG(&o, temp$argnum);
   } else {
-    char temp[256];
-    sprintf(temp, "%llu", (unsigned long long)temp$argnum);
-    ZVAL_STRING(&o, temp);
+    ZVAL_NEW_STR(&o, zend_strpprintf(0, "%llu", (unsigned long long)temp$argnum));
   }
   t_output_helper($result, &o);
 }
@@ -177,9 +169,7 @@ INT_TYPEMAP(unsigned long long);
   if (lvalue$argnum <= (unsigned long long)LONG_MAX) {
     ZVAL_LONG($arg, (long)(lvalue$argnum));
   } else {
-    char temp[256];
-    sprintf(temp, "%llu", (unsigned long long)lvalue$argnum);
-    ZVAL_STRING((*$arg), temp);
+    ZVAL_NEW_STR((*$arg), zend_strpprintf(0, "%llu", (unsigned long long)lvalue$argnum));
   }
 %}
 %typemap(argout) unsigned long long &OUTPUT
@@ -187,9 +177,7 @@ INT_TYPEMAP(unsigned long long);
   if (*arg$argnum <= (unsigned long long)LONG_MAX) {
     ZVAL_LONG($result, (long)(*arg$argnum));
   } else {
-    char temp[256];
-    sprintf(temp, "%llu", (unsigned long long)(*arg$argnum));
-    ZVAL_STRING($result, temp);
+    ZVAL_NEW_STR($result, zend_strpprintf(0, "%llu", (unsigned long long)(*arg$argnum)));
   }
 %}
 
diff --git a/Source/Modules/php.cxx b/Source/Modules/php.cxx
index 72a2508f1..56152712d 100644
--- a/Source/Modules/php.cxx
+++ b/Source/Modules/php.cxx
@@ -151,14 +151,12 @@ static void SwigPHP_emit_pointer_type_registrations() {
   Printf(s_wrappers, "static int swig_ptr_cast_object(zend_object *zobj, zval *retval, int type) {\n");
   Append(s_wrappers, "#endif\n");
   Printf(s_wrappers, "  if (type == IS_STRING) {\n");
-  Printf(s_wrappers, "    char buf[80];\n");
   Append(s_wrappers, "#if PHP_MAJOR_VERSION < 8\n");
   Printf(s_wrappers, "    swig_object_wrapper *obj = SWIG_Z_FETCH_OBJ_P(z);\n");
   Append(s_wrappers, "#else\n");
   Printf(s_wrappers, "    swig_object_wrapper *obj = swig_php_fetch_object(zobj);\n");
   Append(s_wrappers, "#endif\n");
-  Printv(s_wrappers, "    sprintf(buf, \"SWIGPointer(%p,owned=%d)\", obj->ptr, obj->newobject);\n", NIL);
-  Printf(s_wrappers, "    ZVAL_STRING(retval, buf);\n");
+  Printv(s_wrappers, "    ZVAL_NEW_STR(retval, zend_strpprintf(0, \"SWIGPointer(%p,owned=%d)\", obj->ptr, obj->newobject));\n", NIL);
   Printf(s_wrappers, "    return SUCCESS;\n");
   Printf(s_wrappers, "  }\n");
   Printf(s_wrappers, "  return FAILURE;\n");