Form Validator: Rules as Functions
Build the validation library that powers every signup form: required, email, min-length, composed as small functions you can reuse.
What you'll be able to build
Build the validation library that powers every signup form: required, email, min-length, composed as small functions you can reuse. Along the way you pick up real, transferable PHP skills, not just this one project:
- closures as validation rules
- higher-order functions
- associative arrays of fields to rules
- collecting errors into a structure
- early returns and guard clauses
- composing predicates
A course like this one
Yours is built from your own placement, so module count and depth will differ. This map shows what a intermediate-level PHP learner building Form Validator actually gets.
- Module 1: Values, variables, and echo5 lessons
Builds the script for your form validator.
- Module 2: Associative arrays and the array toolkit5 lessons
Builds the array pipeline workflow for your form validator.
- Module 3: Control flow, truthiness, and predicting output5 lessons
Builds the function that powers your form validator.
- Module 4: Functions, arrays, and reading errors5 lessons
Builds the reusable class for your form validator.
- Module 5: Classes, objects, and program design5 lessons
Builds the associative model for your form validator.
- Module 6: Shipping a reusable PHP tool3 lessons
Builds the command-line tool for your form validator.
How the lessons actually work
Every lesson has you predict what a piece of PHP code will output before you run it, then run it for real in your browser and fix what you got wrong. Each module ends in a challenge gate with hidden tests, so you can't advance until your code actually works. The course closes with a capstone that assembles everything into Form Validator, and a runnable proof page tied to your own code.
Common questions
How long does the Form Validator: Rules as Functions course take?
about 7 hours, across 6 modules and 28 lessons, at roughly 15 minutes per lesson. Your own course may run shorter or longer, since it's sized to your placement result, not a fixed template.
Do I need experience?
Some. This is an intermediate-tier PHP project, so it assumes you're comfortable with PHP basics and pushes past them.
How much does it cost?
$15 one-time, no subscription. The first module is free, so you can see exactly how the course teaches before you pay for the rest.