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php artisan make:rule IsValidPassword

<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;
use Illuminate\Support\Str;

class IsValidPassword implements Rule
{
    /**
     * Determine if the Length Validation Rule passes.
     *
     * @var boolean
     */
    public bool $lengthPasses = true;

    /**
     * Determine if the Uppercase Validation Rule passes.
     *
     * @var boolean
     */
    public bool $uppercasePasses = true;

    /**
     * Determine if the Numeric Validation Rule passes.
     *
     * @var boolean
     */
    public bool $numericPasses = true;

    /**
     * Determine if the Special Character Validation Rule passes.
     *
     * @var boolean
     */
    public bool $specialCharacterPasses = true;

    /**
     * Determine if the validation rule passes.
     *
     * @param  string  $attribute
     * @param  mixed  $value
     * @return bool
     */
    public function passes($attribute, $value)
    {
        $this->lengthPasses = (Str::length($value) >= 8);
        $this->uppercasePasses = (Str::lower($value) !== $value);
        $this->numericPasses = ((bool) preg_match('/[0-9]/', $value));
        $this->specialCharacterPasses = ((bool) preg_match('/[^A-Za-z0-9]/', $value));

        return ($this->lengthPasses && $this->uppercasePasses && $this->numericPasses && $this->specialCharacterPasses);
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message()
    {
        if (!$this->lengthPasses)
        {
            return 'The :attribute must be at least 8 characters.';
        }
        elseif (!$this->uppercasePasses)
        {
            return 'The :attribute must contain at least one uppercase character.';
        }
        elseif (!$this->numericPasses)
        {
            return 'The :attribute must contain at least one number.';
        }
        else
        {
            return 'The :attribute must contain one special character.';
        }
    }
}

$request->validate([
    'password'              => ['required','max:255',new isValidPassword(),'required_with:password_confirmation','same:password_confirmation'],
    'password_confirmation' => 'required|min:8'
]);