Chapter 26 of 38

CRUD Operations

Build validated create, bounded read, safe update, delete, pagination, and transactions.

48 minutes 10 quick checksBy Subha Prasad

Lesson 26 of 38Course navigation

Lesson content

Read, practise, then check your understanding

CRUD means create, read, update, and delete. HTTP and database operations should validate identifiers, authorize the acting user, parameterize values, and return stable outcomes.

Practical example

<?php
$stmt = $pdo->prepare('UPDATE users SET name = :name WHERE id = :id');
$stmt->execute(['name' => $name, 'id' => $id]);
if ($stmt->rowCount() === 0) { /* distinguish unchanged or missing deliberately */ }

Use transactions for related changes and optimistic locking/version columns for concurrent edits. Paginate large reads with stable ordering. Decide between hard delete, soft delete, and archival based on domain/legal needs. Audit sensitive changes.

Knowledge check

Answer every question correctly to complete this chapter.

Which statement best describes Create?

Which PHP term matches this description: Insertion of a new persistent record.

Which statement best describes Read?

Which PHP term matches this description: Retrieval of records with bounded selection.

Which statement best describes Update?

Which PHP term matches this description: Modification of an identified record.

Which statement best describes Delete?

Which PHP term matches this description: Removal, archival, or soft deletion of a record.

Which statement best describes pagination?

Which PHP term matches this description: Bounded retrieval of a result window rather than every row.

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