Codeigniter 4 form validation example

 

$rules = [

            'fname' => ['label' => 'First name', 'rules' => 'required'],

            'fname' => 'required',

            'mobile' => 'required|numeric|regex_match[/^[0-9]{10}$/]',
            'mobile'=> 'required|numeric|min_length[10]|max_length[10]|is_unique[registration.mobile]',
            'whatsapp'=> 'required|numeric|min_length[10]|max_length[10]',
            'address1'=> 'required|min_length[20]|max_length[200]',
            'city'=> 'required|min_length[3]|max_length[50]',
            'pincode'=> 'required|numeric',
            'state'=> 'required',
            'country'=> 'required',
            'business_name'=> 'required|min_length[5]|max_length[50]',
            'short_description'=> 'required|min_length[100]|max_length[150]',
            'concept'=> 'required',
            'description'=> 'required|min_length[1000]|max_length[2000]',
            'expect_money'=> 'required|numeric',
            'term'=> 'required'
            
        ];

protected $validationRules    = [
        'username'     => 'required|alpha_numeric_space|min_length[3]',
        'email'        => 'required|valid_email|is_unique[users.email]',
        'password'     => 'required|min_length[8]',
        'pass_confirm' => 'required_with[password]|matches[password]',
    ];

$rules = [
				"name" => "required",
				"email" => "required",
				"mobile" => "required|mobileValidation[mobile]|alreadyExists[mobile]",
                              //"mobile" => "required|mobileValidation[mobile]|is_unique[tbl_students.mobile]",
			]; 

 HTML Number validation control.

 <form action="/action_page.php">
  <label for="username">Username:</label>
  <input type="text" id="username" name="username" maxlength="10"><br><br>
  <input type="submit" value="Submit">
</form>

 <input maxlength="10" />

<input name="somename"
    oninput="javascript: if (this.value.length > this.maxLength) this.value = this.value.slice(0, this.maxLength);"
    type = "number"
    maxlength = "6"
 />