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[2019-05-01 08:59 UTC] f dot bosch at genkgo dot nl
Description: ------------ When binding a value against a MySQL PDO statement, the behaviour between PHP 7.1 and PHP 7.2 differs. When you bind a value as integer while passing a float, this was no problem with PHP7.1. However, it became a problem in PHP7.2. The problem is when executing the following. It inserts 0.5 in PHP7.1, and 0 in PHP7.2. I have tested this against MariaDB (10.1 and 10.2), not against MySQL. Another person also found difference in behaviour: https://stackoverflow.com/questions/54413798/pdoparam-int-behaviour-in-php-7-1-php-7-2. $stmt = $pdo->prepare('INSERT INTO tbl (val) VALUES (?)'); $stmt->bindValue(1, 0.5, PDO::PARAM_INT); See also this pull request in the Laravel Framework for this behaviour change: https://github.com/laravel/framework/pull/28379. Test script: --------------- <?php $pdo = new PDO('mysql:dbname=floattest;host=127.0.0.1', 'root', ''); $create = $pdo->prepare('CREATE TABLE IF NOT EXISTS tbl (val DECIMAL(9,2))'); $create->execute(); $del = $pdo->prepare('DELETE FROM tbl'); $del->execute(); $ins = $pdo->prepare('INSERT INTO tbl (val) VALUES (?)'); $ins->bindValue(1, 0.5, PDO::PARAM_INT); $ins->execute(); $sel = $pdo->prepare('SELECT * FROM tbl'); $sel->execute(); var_dump($sel->fetchColumn(0)); Expected result: ---------------- 0.5 Actual result: -------------- 0 PatchesPull RequestsHistoryAllCommentsChangesGit/SVN commits
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Last updated: Sun Dec 07 14:00:01 2025 UTC |
This fix actually triggered another issue: - Let's say we have foo table and it's big - We have an SQL `SELECT * FROM foo WHERE bar IN (:param)` - We bindValue('param', 'baz', \PDO::PARAM_INT) // INT is a mistake obviously - As result PDO will send `SELECT * FROM foo WHERE bar IN (0)` which is a valid query and it's causing MySQL (probably because of type-conversion) to return all rows that I think we should add some checks to `pdo_parse_params` and make sure that type of value is correct otherwise throw error.Not sure is my problem a bug here. $sql = 'SELECT * FROM `my_table` WHERE `id` = :id AND `deleted` = :deleted LIMIT 0, 1'; $Sth = $this->Db->PDO($this->connectKey)->prepare($sql); $Sth->bindValue(':deleted', 0); $Sth->bindValue(':id', '1'); $Sth->execute(); $result = $Sth->fetchObject();// always return false in PHP 7.2+ but return correct result in PHP 7.1- `$result` expect result is object. Actual in PHP 7.2+: `false`. Actual in PHP 7.1-: object. From https://www.php.net/manual/en/pdostatement.bindvalue.php page, the `$data_type` argument default value is `PDO::PARAM_STR`. So, if I add `PDO::PARAM_STR` to third argument (for PHP 7.2+) the result will be return correctly.