Fixed bug #62024 (unable to run consecutive prepared querys with null values)

Credits to james@kenjim.com for the patch.

Author: Matheus Degiovani

ext/pdo_firebird/firebird_statement.c

@@ -535,12 +535,12 @@ static int firebird_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_dat
 				int force_null;
 
 				case IS_LONG:
-					var->sqltype = sizeof(long) == 8 ? SQL_INT64 : SQL_LONG;
+					var->sqltype = (sizeof(long) == 8 ? SQL_INT64 : SQL_LONG) + (var->sqltype & 1);
 					var->sqldata = (void*)&Z_LVAL_P(param->parameter);
 					var->sqllen = sizeof(long);
 					break;
 				case IS_DOUBLE:
-					var->sqltype = SQL_DOUBLE;
+					var->sqltype = SQL_DOUBLE + (var->sqltype & 1);
 					var->sqldata = (void*)&Z_DVAL_P(param->parameter);
 					var->sqllen = sizeof(double);
 					break;
@@ -560,7 +560,7 @@ static int firebird_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_dat
 							force_null = (Z_STRLEN_P(param->parameter) == 0);
 					}
 					if (!force_null) {
-						var->sqltype = SQL_TEXT;
+						var->sqltype = SQL_TEXT + (var->sqltype & 1);
 						var->sqldata = Z_STRVAL_P(param->parameter);
 						var->sqllen	 = Z_STRLEN_P(param->parameter);
 						break;

ext/pdo_firebird/tests/bug_62024.phpt

@@ -0,0 +1,51 @@
+--TEST--
+Bug #62024 Cannot insert second row with null using parametrized query (Firebird PDO)
+--SKIPIF--
+<?php extension_loaded("pdo_firebird") or die("skip"); ?>
+<?php function_exists("ibase_query") or die("skip"); ?>
+--FILE--
+<?php
+
+require("testdb.inc");
+
+$dbh = new PDO("firebird:dbname=$test_base",$user,$password) or die;
+$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
+$value = '2';
+@$dbh->exec('DROP TABLE test_insert');
+$dbh->exec("CREATE TABLE test_insert (ID INTEGER NOT NULL, TEXT VARCHAR(10))");
+
+$dbh->commit();
+
+//start actual test
+
+$sql = "insert into test_insert (id, text) values (?, ?)";
+$sttmt = $dbh->prepare($sql);
+
+$args_ok = [1, "test1"];
+$args_err = [2, null];
+
+$res = $sttmt->execute($args_ok);
+var_dump($res);
+
+$res = $sttmt->execute($args_err);
+var_dump($res);
+
+$dbh->commit();
+
+
+//teardown test data
+$sttmt = $dbh->prepare('DELETE FROM test_insert');
+$sttmt->execute();
+
+$dbh->commit();
+
+$dbh->exec('DROP TABLE test_insert');
+
+unset($sttmt);
+unset($dbh);
+
+?>
+--EXPECT--
+bool(true)
+bool(true)
+