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<?php echo "<h3>Date Functions</h3>"; echo "<p>Today: " . date("l, F j, Y") . "</p>"; echo "<p>Time: " . date("H:i:s") . "</p>"; echo "<p>Timestamp: " . time() . "</p>"; echo "<h3>JSON</h3>"; $user = ["name"=>"Alice","skills"=>["PHP","MySQL"]]; $json = json_encode($user, JSON_PRETTY_PRINT); echo "<pre>" . htmlspecialchars($json) . "</pre>"; echo "<h3>Regex</h3>"; $email = "alice@example.com"; $valid = preg_match("/^[^@]+@[^@]+\.[^@]+$/", $email); echo "<p>Email valid: " . ($valid ? "Yes" : "No") . "</p>"; ?>
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