RobinNixon
204 lines
6.2 KiB
PHP
204 lines
6.2 KiB
PHP
<?php // adduser.php
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// Start with the PHP code
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$forename = $surname = $username = $password = $age = $email = "";
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if (isset($_POST['forename']))
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$forename = fix_string($_POST['forename']);
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if (isset($_POST['surname']))
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$surname = fix_string($_POST['surname']);
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if (isset($_POST['username']))
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$username = fix_string($_POST['username']);
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if (isset($_POST['password']))
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$password = fix_string($_POST['password']);
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if (isset($_POST['age']))
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$age = fix_string($_POST['age']);
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if (isset($_POST['email']))
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$email = fix_string($_POST['email']);
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$fail = validate_forename($forename);
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$fail .= validate_surname($surname);
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$fail .= validate_username($username);
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$fail .= validate_password($password);
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$fail .= validate_age($age);
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$fail .= validate_email($email);
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echo "<!DOCTYPE html>\n<html><head><title>An Example Form</title>";
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if ($fail == "")
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{
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echo "</head><body>Form data successfully validated:
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$forename, $surname, $username, $password, $age, $email.</body></html>";
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// This is where you would enter the posted fields into a database,
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// preferably using hash encryption for the password.
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exit;
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}
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echo <<<_END
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<!-- The HTML/JavaScript section -->
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<style>
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.signup {
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border: 1px solid #999999;
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font: normal 14px helvetica; color:#444444;
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}
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</style>
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<script>
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function validate(form)
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{
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fail = validateForename(form.forename.value)
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fail += validateSurname(form.surname.value)
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fail += validateUsername(form.username.value)
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fail += validatePassword(form.password.value)
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fail += validateAge(form.age.value)
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fail += validateEmail(form.email.value)
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if (fail == "") return true
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else { alert(fail); return false }
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}
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function validateForename(field)
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{
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return (field == "") ? "No Forename was entered.\\n" : ""
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}
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function validateSurname(field)
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{
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return (field == "") ? "No Surname was entered.\\n" : ""
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}
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function validateUsername(field)
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{
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if (field == "") return "No Username was entered.\\n"
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else if (field.length < 5)
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return "Usernames must be at least 5 characters.\\n"
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else if (/[^a-zA-Z0-9_-]/.test(field))
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return "Only a-z, A-Z, 0-9, - and _ allowed in Usernames.\\n"
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return ""
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}
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function validatePassword(field)
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{
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if (field == "") return "No Password was entered.\\n"
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else if (field.length < 6)
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return "Passwords must be at least 6 characters.\\n"
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else if (!/[a-z]/.test(field) || ! /[A-Z]/.test(field) ||
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!/[0-9]/.test(field))
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return "Passwords require one each of a-z, A-Z and 0-9.\\n"
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return ""
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}
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function validateAge(field)
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{
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if (isNaN(field)) return "No Age was entered.\\n"
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else if (field < 18 || field > 110)
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return "Age must be between 18 and 110.\\n"
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return ""
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}
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function validateEmail(field)
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{
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if (field == "") return "No Email was entered.\\n"
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else if (!((field.indexOf(".") > 0) &&
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(field.indexOf("@") > 0)) ||
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/[^a-zA-Z0-9.@_-]/.test(field))
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return "The Email address is invalid.\\n"
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return ""
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}
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</script>
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</head>
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<body>
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<table border="0" cellpadding="2" cellspacing="5" bgcolor="#eeeeee">
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<th colspan="2" align="center">Signup Form</th>
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<tr><td colspan="2">Sorry, the following errors were found<br>
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in your form: <p><font color=red size=1><i>$fail</i></font></p>
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</td></tr>
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<form method="post" action="adduser.php" onSubmit="return validate(this)">
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<tr><td>Forename</td>
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<td><input type="text" maxlength="32" name="forename" value="$forename">
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</td></tr><tr><td>Surname</td>
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<td><input type="text" maxlength="32" name="surname" value="$surname">
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</td></tr><tr><td>Username</td>
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<td><input type="text" maxlength="16" name="username" value="$username">
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</td></tr><tr><td>Password</td>
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<td><input type="text" maxlength="12" name="password" value="$password">
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</td></tr><tr><td>Age</td>
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<td><input type="text" maxlength="3" name="age" value="$age">
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</td></tr><tr><td>Email</td>
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<td><input type="text" maxlength="64" name="email" value="$email">
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</td></tr><tr><td colspan="2" align="center"><input type="submit"
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value="Signup"></td></tr>
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</form>
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</table>
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</body>
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</html>
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_END;
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// The PHP functions
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function validate_forename($field)
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{
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return ($field == "") ? "No Forename was entered<br>": "";
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}
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function validate_surname($field)
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{
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return($field == "") ? "No Surname was entered<br>" : "";
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}
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function validate_username($field)
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{
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if ($field == "") return "No Username was entered<br>";
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else if (strlen($field) < 5)
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return "Usernames must be at least 5 characters<br>";
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else if (preg_match("/[^a-zA-Z0-9_-]/", $field))
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return "Only letters, numbers, - and _ in usernames<br>";
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return "";
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}
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function validate_password($field)
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{
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if ($field == "") return "No Password was entered<br>";
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else if (strlen($field) < 6)
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return "Passwords must be at least 6 characters<br>";
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else if (!preg_match("/[a-z]/", $field) ||
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!preg_match("/[A-Z]/", $field) ||
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!preg_match("/[0-9]/", $field))
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return "Passwords require 1 each of a-z, A-Z and 0-9<br>";
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return "";
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}
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function validate_age($field)
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{
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if ($field == "") return "No Age was entered<br>";
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else if ($field < 18 || $field > 110)
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return "Age must be between 18 and 110<br>";
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return "";
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}
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function validate_email($field)
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{
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if ($field == "") return "No Email was entered<br>";
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else if (!((strpos($field, ".") > 0) &&
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(strpos($field, "@") > 0)) ||
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preg_match("/[^a-zA-Z0-9.@_-]/", $field))
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return "The Email address is invalid<br>";
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return "";
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}
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function fix_string($string)
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{
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if (get_magic_quotes_gpc()) $string = stripslashes($string);
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return htmlentities ($string);
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}
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?>
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