Use ZSTR_CHAR

Author: Girgias

Zend/zend_string.h

@@ -551,9 +551,6 @@ EMPTY_SWITCH_DEFAULT_CASE()
 	_(ZEND_STR_FALSE,                  "false") \
 	_(ZEND_STR_NULL_LOWERCASE,         "null") \
 	_(ZEND_STR_MIXED,                  "mixed") \
-	_(ZEND_STR_0,                      "0") \
-	_(ZEND_STR_1,                      "1") \
-	_(ZEND_STR_QUESTION_MARK,          "?") \
 
 
 typedef enum _zend_known_string_id {

ext/pdo/pdo_sql_parser.re

@@ -122,7 +122,7 @@ PDO_API int pdo_parse_params(pdo_stmt_t *stmt, zend_string *inquery, zend_string
 
 			if (t == PDO_PARSER_ESCAPED_QUESTION) {
 				plc->bindno = PDO_PARSER_BINDNO_ESCAPED_CHAR;
-				plc->quoted = ZSTR_KNOWN(ZEND_STR_QUESTION_MARK);
+				plc->quoted = ZSTR_CHAR('?');
 				plc->freeq = 0;
 				escapes++;
 			} else {
@@ -263,7 +263,7 @@ safe:
 
 					switch (param_type) {
 						case PDO_PARAM_BOOL:
-							plc->quoted = zend_is_true(parameter) ? ZSTR_KNOWN(ZEND_STR_1) : ZSTR_KNOWN(ZEND_STR_0);
+							plc->quoted = zend_is_true(parameter) ? ZSTR_CHAR('1') : ZSTR_CHAR('0');
 							plc->freeq = 0;
 							break;
 
@@ -418,7 +418,7 @@ rewrite:
 			name = estrndup(plc->pos, plc->len);
 			zend_hash_index_update_mem(stmt->bound_param_map, plc->bindno, name, plc->len + 1);
 			efree(name);
-			plc->quoted = ZSTR_KNOWN(ZEND_STR_QUESTION_MARK);
+			plc->quoted = ZSTR_CHAR('?');
 			newbuffer_len -= plc->len - 1;
 		}