Validation in php registration form

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    php login validation with database
  • How to validate login form in php

    • Email validation in php

  • Email validation in php
  • Php form validation and submit to database
  • Password validation in php
  • Php form validation before submit
  • Form validation in html

    • Password validation in php...

    PHP Form Validation

    Form validation is a crucial step that needs to be completed before submitting data to the database. This process is performed to prevent any errors or faulty data from being inserted into the database.

    The HTML form includes various input fields such as email, text, checkbox, radio button, etc.

    Php form validation with mysql database

    These input fields must be validated to ensure that the user enters only the intended values and not incorrect ones.

    Empty Field Validation

    This is used to check if user has added any data in the required input field.

    Here, empty() is used to check if a variable is empty or not.

    // Validating that the user name is added or not
    if (empty($_POST["UserName"])) {
    $errorMsg = "User Name is required";
    } else {
    // If username is added, we can use it for further use
    $userName = input_data($_POST["UserName"]);
    }

    String Validation

    This is used to check if user has added valid string in the required input field.

    Here, preg_match() is used for pattern matching.

    $userName = $_POST["userName"];
    // To check that User Name only contains alphabets, numbers, and unders