Validating web source information
In some situations, you may wish to run validation checks against a field only if that field is present in the input array.
To quickly accomplish this, add the Sometimes you may wish to add validation rules based on more complex conditional logic.
However, if the user only changes the name field and not the e-mail field, you do not want a validation error to be thrown because the user is already the owner of the e-mail address.
To instruct the validator to ignore the user's ID, we'll use the method.
A field is considered "empty" if one of the following conditions are true: corresponds to the file size in kilobytes.
The field under validation must start with one of the given values. If you would like to allow the field to also be Forcing A Unique Rule To Ignore A Given ID: Sometimes, you may wish to ignore a given ID during the unique check.
To conditionally add this requirement, we can use the Laravel provides a variety of helpful validation rules; however, you may wish to specify some of your own.
First, create a Let's assume our web application is for game collectors.The file under validation must have a MIME type corresponding to one of the listed extensions.Even though you only need to specify the extensions, this rule actually validates against the MIME type of the file by reading the file's contents and guessing its MIME type.trait which provides a convenient method to validate incoming HTTP request with a variety of powerful validation rules.
To learn about Laravel's powerful validation features, let's look at a complete example of validating a form and displaying the error messages back to the user.For example, consider an "update profile" screen that includes the user's name, e-mail address, and location.