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Add very basic spam filter to guestbook

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This commit is contained in:
Frankie B 2023-01-26 22:12:08 +00:00
parent 6a8da5f22a
commit 21c1fa2b7c
1 changed files with 44 additions and 25 deletions
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21
guestbook/submit.php
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@ -17,8 +17,22 @@
<div id="pagebody">
<div id="content">
<?php
$banned_keywords = array("financial", "finance", "stymn", "world4news", "invest");
$contains_keywords = array();
$name = strip_tags($_POST["name"]);
$msg = strip_tags($_POST["message"]);
$prohibit = false;
foreach ($banned_keywords as $keyword) {
if (strpos(strtolower($msg), $keyword) !== false) {
$prohibit = true;
array_push($contains_keywords, $keyword);
}
if (strpos(strtolower($name), $keyword) !== false) {
$prohibit = true;
array_push($contains_keywords, $keyword);
}
}
if (!$prohibit) {
if ($msg === "" || $name === "" || strip_tags(htmlspecialchars_decode($msg)) === "") {
echo '<b>You must provide both a name and message!</b>';
} else {
@ -44,7 +58,12 @@
$stmt->execute();
echo '<b>Success!</b>';
}
?><br><br>
} else {
echo '<b>Your message could not be submitted as it (or your username) contains the following prohibited keywords:</b><br>'.PHP_EOL;
echo ' <pre>'.join(', ', $contains_keywords).'</pre>'.PHP_EOL;
}
?>
<br><br>
<a href="./">Back</a>
</div> <!-- content -->