What' wromh with my code?

<?php
date_default_timezone_set("Asia/Manila");
// DataTables PHP library
include( "../php/DataTables.php" );
$date_from2 = $_POST['date_from2'];
$date_to2 = $_POST['date_to2'];
$users_id = $_POST['users_id'];
// $overall_stats = $_POST['overall_stats'];
$year = $_POST['year'];
// Alias Editor classes so they are easy to use
use
DataTables\Editor,
DataTables\Editor\Field,
DataTables\Editor\Format,
DataTables\Editor\Mjoin,
DataTables\Editor\Options,
DataTables\Editor\Upload,
DataTables\Editor\Validate,
DataTables\Editor\ValidateOptions;

function logChange ( $db, $id) {

    $date = new DateTime(); 
    $date->modify("-1 days");
    // echo $date->format("Y-m-d H:i:s");

    $db->insert( 'transaction_history2', array(
        'user_id'           => $GLOBALS['users_id'],
        'values_log'        => $GLOBALS["overall_stats"],
        'transaction_id'    => $id,
        'date_log'          => $date->format("m-d-Y")
    ) );
}

/*
 * Example PHP implementation used for the join.html example
 */
Editor::inst( $db, 'transactions' )
->field(
    Field::inst( 'transactions.id' ),
    Field::inst( 'transactions.date_received' )->validator( 'Validate::dateFormat', array('empty' => false,'format' => 'm-d-Y')),
    Field::inst( 'transactions.time_received' )->validator( 'Validate::dateFormat', array('empty' => false,'format' => 'Hi')),

    Field::inst( 'transactions.vendor_id' )
    ->options( Options::inst()
        ->table( 'vendors' )
        ->value( 'id' )
        ->label( 'description' )
    ),
    Field::inst( 'vendors.description' ),
    Field::inst( 'transactions.soa_no' ),
    Field::inst( 'transactions.amount' ),
    Field::inst( 'transactions.sap_doc' ),
    Field::inst( 'transactions.truckers_no' ),
    Field::inst( 'transactions.dr' ),

    Field::inst( 'transactions.plant_id' )
    ->options( Options::inst()
        ->table( 'plant' )
        ->value( 'id' )
        ->label( 'description' )
    ),
    Field::inst( 'transactions.date_parked' ),
    Field::inst( 'transactions.posting_date' ),
    Field::inst( 'transactions.date_released' ),
    Field::inst( 'transactions.released_to' ),
    Field::inst( 'transactions.reason_return' ),
    Field::inst( 'transactions.received_from' ),
    Field::inst( 'transactions.department' ),
    Field::inst( 'transactions.rush' ),
    Field::inst( 'transactions.reversal_remarks' ),

    Field::inst( 'u1.last_name' ),
    Field::inst( 'u1.first_name' ),
    
    Field::inst( 'transactions.date_checked' ),

    Field::inst( 'transactions.transaction_type_id' )
    ->options( Options::inst()
        ->table( 'transaction_type' )
        ->value( 'id' )
        ->label( 'description' )
    ),

    Field::inst( 'u2.last_name' ),
    Field::inst( 'u2.first_name' ),

    Field::inst( 'transactions.date_encoded' ), 

    Field::inst( 'u3.last_name' ),
    Field::inst( 'u3.first_name' ),

    Field::inst( 'transactions.date_modified' ),
    
    Field::inst( 'transactions.status' ),
    Field::inst( 'transactions.year' )

)
->on( 'postEdit', function ($editor, $id, $row) {
    logChange( $editor->db(),$id);
} )
->on( 'postRemove', function ( $editor, $id, $row ) {
    logChange( $editor->db(),$id);
} )

->leftJoin( 'vendors', 'vendors.id', '=', 'transactions.vendor_id' )
->leftJoin( 'plant', 'plant.id', '=', 'transactions.plant_id' )
->leftJoin( 'users u1', 'u1.id', '=', 'transactions.checked_by' )
->leftJoin( 'users u2', 'u2.id', '=', 'transactions.encoded_by' )
->leftJoin( 'users u3', 'u3.id', '=', 'transactions.modified_by' )
->where( function ($q) {
    $q->where( 'transactions.is_deleted', 0, '=' );
    
    if($GLOBALS["date_from2"] != '' && $GLOBALS["date_from2"] != ''){
        $dt_from = date_create($GLOBALS["date_from2"]);
        $dt_to = date_create($GLOBALS["date_to2"]);
        $q->and_where('date_received', date_format($dt_from,'m-d-Y') ,'>=');
        $q->and_where('date_received', date_format($dt_to,'m-d-Y') ,'<=');
    }

    $q->where( 'transactions.year', $GLOBALS["year"], '=' );

})
->process($_POST)
->json();

Edited by Colin - Syntax highlighting. Details on how to highlight code using markdown can be found in this guide.