Charlie PHP Expert Training Page 1
PHP Expert - Volume 01
PHP Foundations
Program objective. Train Charlie to reason, implement, review, debug and explain professional PHP systems. This
volume is not considered learned until its assessment and regression checks pass.
Certification rule: TRAIN -> PRACTICE -> TEST -> CERTIFY -> REGRESSION -> RELEASE. A planned result is not
evidence of success; only observed passing results close the certification.
Learning objectives
 Explain value vs reference behavior
 Write safe control flow without hidden assumptions
 Use functions to reduce duplication
 Distinguish syntax, runtime and logical errors
Core curriculum

1. PHP execution model and request lifecycle
Charlie must be able to explain php execution model and request lifecycle, recognize common failure modes, and apply
the concept in code without relying on memorized snippets. Explanations must distinguish language behavior, application
design choices, and environment-specific assumptions.

2. Syntax, variables, scalar and compound types
Charlie must be able to explain syntax, variables, scalar and compound types, recognize common failure modes, and
apply the concept in code without relying on memorized snippets. Explanations must distinguish language behavior,
application design choices, and environment-specific assumptions.

3. Operators, conditionals, loops and match
Charlie must be able to explain operators, conditionals, loops and match, recognize common failure modes, and apply the
concept in code without relying on memorized snippets. Explanations must distinguish language behavior, application
design choices, and environment-specific assumptions.

4. Functions, scope, closures and callbacks
Charlie must be able to explain functions, scope, closures and callbacks, recognize common failure modes, and apply the
concept in code without relying on memorized snippets. Explanations must distinguish language behavior, application
design choices, and environment-specific assumptions.

5. Arrays, strings, dates and filesystem basics
Charlie must be able to explain arrays, strings, dates and filesystem basics, recognize common failure modes, and apply
the concept in code without relying on memorized snippets. Explanations must distinguish language behavior, application
design choices, and environment-specific assumptions.

6. Errors, exceptions and defensive input handling

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Charlie must be able to explain errors, exceptions and defensive input handling, recognize common failure modes, and
apply the concept in code without relying on memorized snippets. Explanations must distinguish language behavior,
application design choices, and environment-specific assumptions.
Hands-on laboratories
Lab 1: Build a CLI inventory calculator
Required evidence: working implementation or analysis, explanation of design choices, at least one negative/failure case,
and verification that the result behaves as intended.
Lab 2: Parse and validate a CSV-like data set
Required evidence: working implementation or analysis, explanation of design choices, at least one negative/failure case,
and verification that the result behaves as intended.
Lab 3: Create reusable functions with explicit inputs/outputs
Required evidence: working implementation or analysis, explanation of design choices, at least one negative/failure case,
and verification that the result behaves as intended.
Lab 4: Diagnose five syntax/runtime/logic defects
Required evidence: working implementation or analysis, explanation of design choices, at least one negative/failure case,
and verification that the result behaves as intended.
Code review discipline
When reviewing code, Charlie should classify findings by impact: correctness, security, data integrity, maintainability,
performance, and style. Correctness/security issues outrank cosmetic preferences. Charlie must not claim a vulnerability,
performance bottleneck, or successful fix without evidence appropriate to the claim.
Assessment blueprint
Area Weight Pass condition
Conceptual reasoning 25% Explains behavior and tradeoffs accurately
Implementation 30% Produces correct, readable, maintainable PHP
Debugging 20% Localizes faults using evidence
Security/reliability 15% Avoids unsafe assumptions and protects boundaries
Communication 10% Direct answer; no internal-source leakage
Volume certification threshold
Minimum score: 90/100, with no critical security, data-integrity, evidence-classification, or fabricated-API error. A failure in a
critical area requires targeted retraining and a focused retest.
Regression requirements
After this volume passes, future certifications must include selected questions from this volume. A new skill is not released
if it causes regression in previously certified PHP behavior.
Trainer notes

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Use current official PHP/package/framework documentation whenever a question depends on a version-specific API or
behavior. Generic knowledge may explain concepts, but version-specific claims must be verified against the applicable
documentation.