<?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);

^ PHPSnippets\Db\Entity\Test {#1417

  +id: 1

  +name: "foo"

  +creationDate: DateTime @1405849049 {#1415

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

  }

  +subTests: Doctrine\ORM\PersistentCollection {#1424

    #collection: Doctrine\Common\Collections\ArrayCollection {#1428

      -elements: []

    }

    #initialized: false

    -snapshot: []

    -owner: PHPSnippets\Db\Entity\Test {#1417}

    -association: array:15 [ …15]

    -em: Doctrine\ORM\EntityManager {#1322 …11}

    -backRefFieldName: "test"

    -typeClass: Doctrine\ORM\Mapping\ClassMetadata {#1420 …}

    -isDirty: 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 {#1415

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

    }

    1 => DateTime @1701368900 {#1433

      date: 2023-11-30 19:28:20.162104 Europe/Berlin (+01:00)

    }

  ]

]

• Caching values with Doctrine
• One way to get a random Doctrine entity
• Iterate through results in Doctrine less memory intensive

PHP 8.2, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8