GH-22681: avoid truncation on null bytes in ReflectionEnum::__toString()

ext/reflection/php_reflection.c

@@ -677,7 +677,9 @@ static void _enum_case_string(smart_str *str, const zend_string *name, zend_clas
 	}
 
 	if (c->doc_comment) {
-		smart_str_append_printf(str, "%s%s\n", indent, ZSTR_VAL(c->doc_comment));
+		smart_str_appends(str, indent);
+		smart_str_append(str, c->doc_comment);
+		smart_str_appendc(str, '\n');
 	}
 	smart_str_append_printf(str, "%sCase %s", indent, ZSTR_VAL(name));
 	if (c->ce->enum_backing_type == IS_UNDEF) {
@@ -691,7 +693,9 @@ static void _enum_case_string(smart_str *str, const zend_string *name, zend_clas
 		zval *enum_val = zend_enum_fetch_case_value(Z_OBJ(c->value));
 		zend_string *tmp_value_str;
 		zend_string *value_str = zval_get_tmp_string(enum_val, &tmp_value_str);
-		smart_str_append_printf(str, " = %s\n", ZSTR_VAL(value_str));
+		smart_str_appends(str, " = ");
+		smart_str_append(str, value_str);
+		smart_str_appendc(str, '\n');
 		zend_tmp_string_release(tmp_value_str);
 	}
 }

ext/reflection/tests/gh22681/ReflectionEnum_backed_value.phpt

@@ -0,0 +1,61 @@
+--TEST--
+GH-22681: null bytes in backed value truncate ReflectionEnum::__toString()
+--FILE--
+<?php
+
+enum Demo: string {
+	case DEMO = "F\0oo";
+}
+
+$r = new ReflectionEnum(Demo::class);
+echo $r;
+var_dump( new ReflectionEnumBackedCase(Demo::class, 'DEMO')->getBackingValue() );
+?>
+--EXPECTF--
+Enum [ <user> enum Demo: string implements UnitEnum, BackedEnum ] {
+  @@ %s %d-%d
+
+  - Enum cases [1] {
+    Case DEMO = F%0oo
+  }
+
+  - Constants [0] {
+  }
+
+  - Static properties [0] {
+  }
+
+  - Static methods [3] {
+    Method [ <internal, prototype UnitEnum> static public method cases ] {
+
+      - Parameters [0] {
+      }
+      - Return [ array ]
+    }
+
+    Method [ <internal, prototype BackedEnum> static public method from ] {
+
+      - Parameters [1] {
+        Parameter #0 [ <required> string|int $value ]
+      }
+      - Return [ static ]
+    }
+
+    Method [ <internal, prototype BackedEnum> static public method tryFrom ] {
+
+      - Parameters [1] {
+        Parameter #0 [ <required> string|int $value ]
+      }
+      - Return [ ?static ]
+    }
+  }
+
+  - Properties [2] {
+    Property [ public protected(set) readonly string $name ]
+    Property [ public protected(set) readonly string $value ]
+  }
+
+  - Methods [0] {
+  }
+}
+string(4) "F%0oo"

ext/reflection/tests/gh22681/ReflectionEnum_case_doc_comment.phpt

@@ -20,7 +20,7 @@ Enum [ <user> enum Demo implements UnitEnum ] {
   @@ %s(%d) : eval()'d code %d-%d
 
   - Enum cases [1] {
-    /** F
+    /** F%0oo */
     Case C
   }