Laravel International String Validation

_InternationalString.php.md

Laravel International String Validation

Validate a string containing any international alpha character.

InternationalString.php should be placed in App\Rules -> App\Rules\InternationalString.php

Usage Example

Example shows usage with validate method from the Request instance in a Controllers store method handling a POST request.

    public function store(Request $request)
    {
        $request->validate([
            'label' => ['required', new InternationalString()],
        ]);

        $request->validated();

        $model = new MyModel();

        $model->fill($request->all());

        $model->saveOrFail();

        return $model;

    }

You can extend the valiation with custom characters, here spaces are included:

 'name' => [new InternationalString('\s')]

Validation allowing dashes and numerics, settings second parameter to true allows numerical values:

 'title' => [new InternationalString('\-',true)]

Validate with custom string message:

 'name' => [new InternationalString('\s',false,'Please enter a valid full name')]

Validate with custom translation key:

 'name' => [new InternationalString('\s',false,'user.fullname')]

InternationalString.php

<?php

/**
 * Author: Marc Newton <code@marcnewton.co.uk>
 * Link: https://gist.github.com/marcnewton/37e7d07a962bf7eb8f2eef38626e6812
 *
 * Laravel custom validation rule.
 * Pattern match for checking strings only contain alphabetical characters from various launguage writing systems.
 * 
 * Accepts additional custom appended regex syntax.
 *
 * Confirmed supported script types: Cyrillic
 */

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;

class InternationalString implements Rule
{
    private
        $extra,
        $numbers,
        $message;

    /**
     * InternationalString constructor.
     * @param string $extra Optional appended regex syntax.
     * @param bool $numbers If true then allow numerical 0-9.
     * @param string|null $message Optionally specify a custom error message or translation key string.
     */
    public function __construct($extra = '', $numbers = false, $message = null)
    {
        $this->extra = $extra;
        $this->numbers = $numbers;
        $this->message = $message ?: 'The :attribute contains invalid characters.';
    }

    public function passes($attribute, $value)
    {
        preg_match('/[^' . ($this->numbers ? '\p{N}' : '') . '\p{L}' . $this->extra . ']/', $value, $invalid);
        return empty($invalid);
    }

    public function message()
    {
        return trans($this->message);
    }
}