Available validation rules in Laravel - Step-by-Step Execution

Concept Flow - Available validation rules

Start: Receive Input Data

↓

Apply Validation Rules

↓

Check Each Rule

↓

Pass

↓

All Pass?

No→Return Errors

Yes↓

Proceed with Valid Data

Input data is checked against each validation rule. If all pass, data proceeds; if any fail, errors are returned.

Execution Sample

Laravel

Validator::make($data, [
  'email' => 'bail|required|email',
  'age' => 'bail|integer|min:18'
]);

This code checks if 'email' is present and valid, and 'age' is an integer at least 18.

Execution Table

Step	Field	Rule Checked	Condition	Result	Action
1	email	required	Is 'email' present?	Yes	Continue to next rule
2	email	email	Is 'email' a valid email format?	Yes	Continue to next field
3	age	integer	Is 'age' an integer?	Yes	Continue to next rule
4	age	min:18	Is 'age' >= 18?	No	Fail validation, add error
5	-	-	-	-	Stop checking, return errors

💡 Validation stops after first failure; errors returned to user.

Variable Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	Final
email	[e-mail]	present	valid format	valid format	valid format	valid
age	16	16	16	integer	fails min:18	invalid

Key Moments - 2 Insights

Why does validation stop after the 'age' fails the min:18 rule?

Because Laravel stops checking further rules once a failure is found, as shown in execution_table step 5.

What happens if the 'email' field is missing?

The 'required' rule fails at step 1, and validation stops immediately returning an error.

Visual Quiz - 3 Questions

Look at the execution table, what is the result of the 'email' field at step 2?

A Passes email format

B Fails email format

C Missing field error

D Not checked yet

💡 Hint

Check the 'Result' column for step 2 in the execution_table.

At which step does the validation fail for the 'age' field?

A Step 3

B Step 4

C Step 2

D Step 5

💡 Hint

Look for the first 'Fail validation' action in the execution_table.

If the 'age' was 20, what would happen at step 4?

A Validation would skip this rule

B Validation would fail

C Validation would pass

D Validation would error out

💡 Hint

Refer to the 'Condition' and 'Result' columns for step 4 in the execution_table.

Concept Snapshot

Laravel validation rules check input fields step-by-step.
Rules like 'required', 'email', 'integer', 'min' apply conditions.
Validation stops at first failure and returns errors.
All rules must pass for data to be accepted.
Use Validator::make() with rules array to validate data.

Full Transcript

Laravel validation rules work by checking each input field against specified rules one by one. For example, the 'email' field is checked if it is present and if it has a valid email format. Then the 'age' field is checked if it is an integer and if it meets the minimum value of 18. If any rule fails, validation stops immediately and errors are returned. This process ensures only valid data proceeds further in the application.