error in zend session database for php7

Question

My application need to use database instead of file for the session management. My Application is based on Zend Framework 1.12.17, php 5.6.25 and actualy on wampserver

That is my config.ini

resources.session.use_only_cookies = true
resources.session.gc_maxlifetime = 864000
resources.session.remember_me_seconds = 864000
resources.session.gc_probability = 1
resources.session.gc_divisor = 100
resources.session.saveHandler.class = "Zend_Session_SaveHandler_DbTable"
resources.session.saveHandler.options.name = "app_session"
resources.session.saveHandler.options.primary = "id"
resources.session.saveHandler.options.modifiedColumn = "modified"
resources.session.saveHandler.options.dataColumn = "data"
resources.session.saveHandler.options.lifetimeColumn = "lifetime"

When I want to upgrade php to php 7.0.10, a warning occurred

Warning: session_write_close(): Failed to write session data (user). Please verify that the current setting of session.save_path is correct (D:\wamp\www\myapp\top\session) in D:\wamp\www\myapp\top\library\versions\ZendFramework-1.12.17-minimal\library\Zend\Session.php on line 732

I'm looking for the origin of this problem. Do you have an idea?

Thanks a lot

Answer 1

On September 2016, Zend Framework 1 is reached EOL (end-of-life). This means it will not be improved anymore. The codebase is too old to work well with PHP 7.

Anyway, you have at least two option:

1. Downgrade to or run in parallel PHP 5.6 on your server to support ancient ZF1 app.
2. Write your own session save handler by extending the DbTable handler as suggested here.

Answer 2

In addition to edigus answer here is such a simple implementation of the extended save handler:

<?php

require_once 'Zend/Session/SaveHandler/DbTable.php';

// NOTE: To fix an issue with Zend_Session_SaveHandler_DbTable on PHP 7 this class extends it and overrides the write
// method to simply always return true.
//
// See: https://stackoverflow.com/a/44985594/1510754
// See: https://github.com/zendframework/zf1/issues/665
// See: https://github.com/zendframework/zf1/pull/654

class My_Session_SaveHandler_DbTable extends Zend_Session_SaveHandler_DbTable
{

    public function write($id, $data)
    {
        parent::write($id, $data);
        return true;
    }

}

Answer 3

The issue is written here: https://github.com/zendframework/zf1/issues/665#issue-127528467

Since an update that returns 0 but doesn't throw an exception was still a successful query with no error

Hence the function write will return false instead of true, and PHP 7.0 requires a true result.

You can fix this by changing, in Zend/Session/SaveHandler/DbTable.php:

if ($this->update($data, $this->_getPrimary($id, self::PRIMARY_TYPE_WHERECLAUSE))) {

To:

if (is_int($this->update($data, $this->_getPrimary($id, self::PRIMARY_TYPE_WHERECLAUSE)))) {

Or you can also remove the if, turn it into an instruction, and keep the $return = true;. Because on error, the query should raise an Exception, so any update() without Exception is good.