<?php

use PHPSnippets\Db\Entity\Test;

/* @var $em Doctrine\ORM\EntityManager */
$uow = $em->getUnitOfWork();

$entityChanges = function ($entity) use ($em, $uow) {
    // compute changes into changeset
    $uow->computeChangeSet(
        $em->getClassMetadata(Test::CLASS),
        $entity
    );

    echo 'Is entity scheduled for update, delete, etc.?';
    dump($uow->isEntityScheduled($entity));
    echo 'What changed in entity (value before/after)?';
    dump($uow->getEntityChangeSet($entity));
};

// get Test entity with id 1
$entity = $em->find(Test::CLASS, 1);
dump($entity);

echo '<b>Set same value for entity name</b>' . PHP_EOL;
$entity->name = 'foo';
$entityChanges($entity);

echo '<b>Change value of name</b>' . PHP_EOL;
$entity->name = 'foobar';
$entityChanges($entity);

echo '<b>Change name again and date value</b>' . PHP_EOL;
$entity->name = 'foobar2';
$entity->creationDate = new DateTime();
$entityChanges($entity);

Test {#1486

  +id: 1

  +name: "foo"

  +creationDate: DateTime @1405849049 {#1483

    date: 2014-07-20 11:37:29.0 Europe/Berlin (+02:00)

  }

  +subTests: PersistentCollection {#1497

    -snapshot: []

    -owner: Test {#1486}

    -association: array:15 [ …15]

    -em: EntityManager {#1437 …11}

    -backRefFieldName: "test"

    -typeClass: ClassMetadata {#1495 …}

    -isDirty: false

    #collection: ArrayCollection {#1500

      -elements: []

    }

    #initialized: false

  }

}

Set same value for entity name
Is entity scheduled for update, delete, etc.?

false

What changed in entity (value before/after)?

[]

Change value of name
Is entity scheduled for update, delete, etc.?

true

What changed in entity (value before/after)?

array:1 [

  "name" => array:2 [

    0 => "foo"

    1 => "foobar"

  ]

]

Change name again and date value
Is entity scheduled for update, delete, etc.?

true

What changed in entity (value before/after)?

array:2 [

  "name" => array:2 [

    0 => "foobar"

    1 => "foobar2"

  ]

  "creationDate" => array:2 [

    0 => DateTime @1405849049 {#1483

      date: 2014-07-20 11:37:29.0 Europe/Berlin (+02:00)

    }

    1 => DateTime @1590993006 {#1619

      date: 2020-06-01 08:30:06.911738 Europe/Berlin (+02:00)

    }

  ]

]

• Using references instead of entities in Doctrine
• Iterate through results in Doctrine less memory intensive
• Closure content executed as transaction in Doctrine DBAL

PHP 7.4, Zend 3.0, Symfony 4.3, Laravel 5.8, PHPUnit 8.0, Doctrine 2.10