As a beginner in PHP, I was trying to learn how PHP runs along with MySQL. So I was practicing how to insert data into a database using a form. So far this is what I did.
<?php error_reporting(E_ALL ^ E_WARNING); define( "TITLE", "GET & POST" ); if( isset( $ _POST["post_submit"] ) ) { // build a function that validates data function validateFormData( $ formData ) { $ formData = trim( stripslashes( htmlspecialchars( $ formData ) ) ); return $ formData; } // check to see if inputs are empty // create variables with form data // wrap the data with our function if( !$ _POST["post_name"] ) { $ nameError = "Please enter your name <br>"; } else { $ name = validateFormData( $ _POST["post_name"] ); } if( !$ _POST["post_email"] ) { $ emailError = "Please enter your email <br>"; } else { $ email = validateFormData( $ _POST["post_email"] ); } } ?>
<head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title><?php echo TITLE; ?></title> <!-- Bootstrap CSS --> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css"> <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries --> <!-- WARNING: Respond.js doesn't work if you view the page via file:// --> <!--[if lt IE 9]> <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script> <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script> <![endif]--> </head> <body> <div class="container"> <h1><?php echo TITLE; ?></h1> <h4>Submitted via $ _GET</h4> <form action="form_get.php" method="get"> <input type="text" placeholder="Name" name="name"> <input type="text" placeholder="Email" name="email"> <input type="submit" name="form_submit"> </form> <hr> <h4>Submitted via $ _POST</h4> <form action="form_post.php" method="post"> <input type="text" placeholder="Name" name="post_name"> <input type="text" placeholder="Email" name="post_email"> <input type="submit" name="post_submit"> </form> <hr> <h4>Submitted to current page</h4> <p class="text-danger">* Required fields</p> <form action="<?php echo htmlspecialchars($ _SERVER['PHP_SELF']); ?>" method="post"> <small class="text-danger">* <?php echo $ nameError; ?></small> <input type="text" placeholder="Name" name="post_name"><br><br> <small class="text-danger">* <?php echo $ emailError; ?></small> <input type="text" placeholder="Email" name="post_email"><br><br> <input type="submit" name="post_submit"> </form> <?php if( isset($ _POST["post_submit"]) ) { echo "<h4>Your info</h4>"; echo "$ name <br> $ email <br>"; } ?> </div> <!-- jQuery --> <script src="//code.jquery.com/jquery-2.1.4.min.js"></script> <!-- Bootstrap JS --> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script> </body> When I wasn’t using error_reporting(E_ALL ^ E_WARNING) it kept showing this warning message [ Warning: Undefined variable $ nameError in C:\xampp\htdocs\mysql\insert.php on line 84 ].
Can anyone help me why it’s showing that there is an undefined variable? Cause I think I defined this variable at the top portion of PHP code.
And is it a good practice to use the error_reporting() function to suppress the warning message from showing?
