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File: fwphp/glomodul/z_examples/login_form_validation.php

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  Classes of Slavko Srakocic  >  B12 PHP FW  >  fwphp/glomodul/z_examples/login_form_validation.php  >  Download  
File: fwphp/glomodul/z_examples/login_form_validation.php
Role: Auxiliary script
Content type: text/plain
Description: Auxiliary script
Class: B12 PHP FW
Manage database records with a PDO CRUD interface
Author: By
Last change: ver 7.0.2 mnu, msg, mkd FUNCTIONAL namespaces, CRUD PDO trait, pretty URL-s
Date: 3 months ago
Size: 3,114 bytes


Class file image Download
  .error {color: #FF0000;}

function myfilter_input($data) {
$data = trim($data);
$data = stripslashes($data);
//$data = htmlspecialchars($data);
$data = htmlspecialchars($data, ENT_QUOTES, 'UTF-8');

// define variables and set to empty values
$nameErr = $emailErr = $genderErr = $websiteErr = "";
$name = $email = $gender = $comment = $website = "";

  if (
    if (empty(
$_POST["name"])) { $nameErr = "Name is required";
    } else {
$name = myfilter_input($_POST["name"]);
// check if name only contains letters and whitespace
if (!preg_match("/^[a-zA-Z ]*$/",$name)) {
$nameErr = "Only letters and white space allowed";
    if (empty(
$_POST["email"])) { $emailErr = "Email is required";
    } else {
$email = myfilter_input($_POST["email"]);
// check if e-mail address is well-formed
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) { $emailErr = "Invalid email format"; }
    if (empty(
$_POST["website"])) { $website = "";
    } else {
$website = myfilter_input($_POST["website"]);
//check if URL address syntax is valid (this reg.expr. also allows dashes in URL)
if (!preg_match(
, $website)) {
$websiteErr = "Invalid URL";

    if (empty(
$_POST["comment"])) { $comment = "";
    } else {
$comment = myfilter_input($_POST["comment"]); }

    if (empty(
$_POST["gender"])) { $genderErr = "Gender is required";
    } else {
$gender = myfilter_input($_POST["gender"]); }


  <h2>PHP Form Validation Example</h2>

  <p><span class="error">* required field</span></p>
  <form method="post" action="<?=htmlspecialchars($_SERVER["PHP_SELF"])?>">

    Name: <input type="text" name="name" value="<?=$name?>">
    <span class="error">* <?=$nameErr?></span>

    <br><br>E-mail: <input type="text" name="email" value="<?=$email?>">
    <span class="error">* <?=$emailErr?></span>

    <br><br>Website: <input type="text" name="website" value="<?=$website?>">
    <span class="error"><?=$websiteErr?></span>

    <br><br>Comment: <textarea
        name="comment" rows="5" cols="40"><?=$comment?></textarea>

    <input type="radio" name="gender" <?php
if (isset($gender) && $gender=="female") echo "checked"; ?> value="female">Female
    <input type="radio" name="gender" <?php
if (isset($gender) && $gender=="male") echo "checked"; ?> value="male">Male
    <input type="radio" name="gender" <?php
if (isset($gender) && $gender=="other") echo "checked"; ?> value="other">Other
    <span class="error">* <?=$genderErr?></span>

    <br><br><input type="submit" name="submit" value="Submit">

echo "<h2>Your Input:</h2>";
$name; echo "<br>";
$email; echo "<br>";
$website; echo "<br>";
$comment; echo "<br>";


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