Certification

Senior PHP Engineer

This certification is designed for experienced PHP engineers who work on production systems and make architecture, delivery, and maintenance decisions that affect the long-term health of backend applications.

It validates senior-level competence across modern PHP language features, application architecture, domain and service boundaries, database discipline, transactional consistency, asynchronous workflows, testing strategy, performance awareness, and production-focused debugging. The focus is not on memorizing isolated syntax details, but on applying PHP correctly in real engineering environments.

Candidates are expected to demonstrate practical judgment in structuring codebases, modeling business logic, choosing appropriate abstractions, controlling side effects, protecting data integrity, and diagnosing failures under real-world constraints. This includes working effectively with APIs, background jobs, integrations, caching, observability signals, and deployment-aware design decisions.

The certification is suitable for engineers who already build with PHP professionally and want to validate that they can deliver robust backend systems with clarity, reliability, maintainability, and senior-level engineering discipline.

Get Certified

What this certification proves

Clear scope for candidates. Clear meaning for reviewers.

Passing result

What a pass confirms

This certificate confirms that the candidate demonstrated senior-level PHP engineering competence in designing, implementing, and maintaining production-ready backend systems with sound architecture, reliable data flows, and disciplined delivery practices.

Scope

What the exam validates

Scope includes modern PHP architecture, OOP and domain modeling, service and HTTP boundaries, database and transaction discipline, asynchronous processing, integration patterns, testing strategy, performance awareness, observability, and production-focused debugging and maintenance decisions.

For reviewers

What someone can verify later

The public certificate page shows the holder name, score, issue date, certificate ID, and current verification status without relying on screenshots.

Share flow

Share one record, not a bundle of files

Use the certificate page as the primary proof. PDF stays available as a convenient copy, but the live page is the canonical record.

Official certificate page

What the verifier will see

Candidate name
Score and pass outcome
Date and certificate ID
Current verification status

Preparation topics

Topics covered by the exam question set.

Use this topic map as a preparation checklist. Questions in this certification are built from these concrete topic areas.

PHP Core & Language Semantics

PHP syntax and language fundamentals
type system
strict typing
expressions and operators
control flow
null handling
function arguments and return types
modern PHP language features

Arrays & Data Handling

array operations
associative arrays
list versus map semantics
array transformations
array filtering and mapping
key preservation and reindexing
search and lookup in arrays
sorting and comparison logic

Strings, Text Processing & Regular Expressions

string manipulation
substring checks
text normalization
pattern matching
regular expressions
safe output escaping

Functions, Closures & Callables

function design
anonymous functions
arrow functions
closure capture semantics
callbacks
first class callables
callable composition

Object-Oriented PHP

classes and objects
constructors
property promotion
inheritance
interfaces
traits
abstraction design
encapsulation
late static binding
cloning semantics
immutable DTO design

Readonly, Immutability & Value Safety

readonly properties
readonly classes
immutable objects
shallow versus deep immutability
controlled mutation patterns

Enums, Attributes & Reflection

backed and pure enums
enum based modeling
custom attributes
reflection API
metadata driven design

Generators, Iteration & Lazy Processing

iterables
generators
lazy evaluation
streaming large datasets
iterator patterns
memory efficient processing

JSON, Serialization & Data Exchange

JSON encoding and decoding
exception based JSON handling
serialization hooks
object serialization
transport safe data conversion

Files, Streams & System IO

filesystem operations
file reading and writing
stream based processing
CSV handling
large file iteration

HTTP, Forms & Request Data

HTTP request data handling
query and form parameters
uploaded files
sessions
request body parsing
response generation

Security Fundamentals

password security
token generation
secure randomness
HMAC verification
timing safe comparison
output safety
input validation basics

PDO & Database Access

PDO fundamentals
prepared statements
parameter binding
fetch modes
safe query execution
database error handling

Modern PHP 8.1–8.4 Features

nullsafe operator
enums
readonly model
first class callables
intersection and DNF types
never type
Override attribute
property hooks
asymmetric visibility
new language additions in PHP 8.1 to 8.4

Performance, Memory & Runtime Discipline

memory awareness
lazy processing strategies
generator based optimization
efficient array usage
runtime cost awareness

Web Application Security

XSS
SQL injection
CSRF
SSRF
IDOR
file upload security
path traversal
insecure deserialization
authentication security
authorization security

How the certification works

From voucher purchase to public certificate.

Once the candidate decides to pursue this certification, the path is simple: buy a voucher, exchange it for this certification, complete the exam, and receive the official certificate after a successful result.

Step 01

Buy a voucher for account balance

The candidate tops up voucher balance first. DevCerts does not sell this certification as a direct one-off checkout item.

Step 02

Choose this certification and exchange the voucher

When the candidate is ready, one voucher is consumed and DevCerts opens exam access for this certification.

Step 03

Pass and receive the official certificate page

After a successful valid result is received from Askium, DevCerts issues the certificate, publishes the public verification page, and keeps PDF available as a secondary copy.

Current certificate policy

What this certification page promises today

A certificate is issued only after a successful valid result.
The public verification page is the canonical certificate artifact.
The issued certificate is active and non-expiring in the current MVP.