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Posted by Curt Zirzow on 12/04/05 21:44
On Sat, Dec 03, 2005 at 10:00:14PM -0500, Michael B Allen wrote:
> The following code works but I'm a little new to PHP and I'd like to
> know if there are better ways to achive the same thing.
>
> In the below form example, if the user supplies one or more fields but
> not all that are required, the form is redisplayed but fields that were
> supplied are prepopulated and the ones that are required but are missing
> are highlighted in red.
>
> Can anyone recommend a better technique or elighten me about features of
> the language that I've missed?
>
> Mike
>
> <html>
> <body>
>
> <?php
> $set = 0;
> $username = "";
> $password = "";
>
> if (isset($_POST['username'])) {
> $username = trim($_POST['username']);
> if (strlen($username) > 0) {
> $set |= 0x01;
> }
> }
> if (isset($_POST['password'])) {
> $password = trim($_POST['password']);
> if (strlen($password) > 0) {
> $set |= 0x02;
> }
> }
> if (($set & 0x03) == 0x03) {
> echo "Logging in with: " . $username . ':' . $password;
> } else {
> ?>
>
> <form action="login.php" method="post">
> <table>
> <tr><td colspan="2">Login:</td></tr>
> <tr><td>Username:</td>
>
> <?php
> if ($set != 0 && ($set & 0x01) == 0) {
> echo "<td bgcolor=\"#ff0000\">";
> } else {
> echo "<td>";
> }
> echo "<input type=\"username\" name=\"username\" value=\"" . $username . "\"/>";
> ?>
>
> </td></tr>
> <tr><td>Password:</td>
>
> <?php
> if ($set != 0 && ($set & 0x02) == 0) {
> echo "<td bgcolor=\"#ff0000\">";
> } else {
> echo "<td>";
> }
> ?>
>
> <input type="password" name="password"/>
> </td></tr>
> <tr><td colspan="2"><input type="submit" value="Login"/></td></tr>
> </table>
> </form>
<style>
.errored {
color: #FF0000;
}
</style>
<?php
$set_class = array(0 => '', 1 => 'errored');
define('SET_USERNAME', 0x01);
define('SET_PASSWORD', 0x02);
define('SET_ALL', SET_USERNAME & SET_PASSWORD);
$set = 0;
$username = "";
$password = "";
if (isset($_POST['username'])) {
$username = trim($_POST['username']);
if (strlen($username) > 0) {
$set |= SET_USERNAME;
}
}
> ...
if (($set & SET_ALL) == SET_ALL) {
echo "Logging in with: " . $username . ':' . $password;
} else {
?>
<form action="login.php" method="post">
<table>
<tr><td colspan="2">Login:</td></tr>
<tr><td>Username:</td>
<?php
$class = $set_class[ $set & SET_USERNAME ];
echo "<td class="$class">
echo "<input type=\"username\" name=\"username\" value=\"" . $username . "\"/>";
> ...
It might be a bit overkill for such a simple thing.. but heck.. i
was bored :)
Curt.
--
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