How to Validate Input for Precise Values in Laravel?

How to Ensure an Input Matches Precise Values in Laravel

In Laravel's validation class, you can enforce that input matches exact words. This is useful when you want to ensure that a user enters a specific value, such as "hello."

There are two primary methods for achieving exact word validation:

1. Using 'in' with a Comma-Separated List:

   $rules = [
       'field' => 'in:hello',
   ];

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   This approach provides a straightforward way to define a list of acceptable values. In this case, the field must contain the exact word "hello."

2. Writing a Regular Expression:

   $rules = [
       'field' => 'regex:^hello$',
   ];

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   Regular expressions offer more flexibility in defining match criteria. The above expression ensures that the field's value starts with "^hello" and ends with "$". This ensures an exact match of the word "hello."

Remember that some regular expressions may require "^" and "$" as delimiters, while others may not. Experiment to determine the appropriate format for your specific use case.

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