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Form processing with input checking, simple captcha and error reporting

/ Published in: PHP
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  1. <?php
  2.         $js_back = 'javascript:history.go(-1)';
  3.  
  4. 	if (isset($_POST['send']))
  5. 	{
  6. 		if ($_POST['captcha'] != 'hello')
  7. 			die('<p class="error">Antispam failed. <a href="'.$js_back.'">Try again</p>');
  8.  
  9. 		$secured = array();
  10. 		$secured = array_map('htmlspecialchars', array_map('strip_tags', $_POST));
  11. 		extract($secured);
  12.  
  13. 		$inputs = array('cname' => 'Firstname, surname', 'cemail' => 'Email', 'msg' => 'Message');
  14. 		foreach ($inputs as $key => $value)
  15. 		{
  16. 			if (empty(${$key}))
  17. 				die('<p class="error">Input '.$value.' is required. <a href="'.$js_back.'">Try again</a></p>');
  18. 		}
  19.  
  20. 		// Code...
  21. 	}
  22.  
  23. ?>
  24. <form action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>" method="post">
  25. 	<table>
  26. 		<tbody>
  27. 			<tr>
  28. 				<td><label for="cname">Firstname, surname:</label></td>
  29. 				<td><input type="text" name="cname" id="cname" size="40" /></td>
  30. 			</tr>
  31. 			<tr>
  32. 				<td><label for="cemail">E-mail:</label></td>
  33. 				<td><input type="text" name="cemail" id="cemail" size="40" /></td>
  34. 			</tr>
  35. 			<tr>
  36. 				<td><label for="msg">Message:</label></td>
  37. 				<td><textarea name="msg" rows="8" cols="38" id="msg"></textarea></td>
  38. 			</tr>
  39. 			<tr>
  40. 				<td>Antispam:</td>
  41. 				<td><input type="text" name="captcha" /> write in "hello"</td>
  42. 			</tr>
  43. 			<tr>
  44. 				<td>&nbsp;</td>
  45. 				<td><input type="submit" name="send" value="Send" /></td>
  46. 			</tr>
  47. 		</tbody>
  48. 	</table>
  49. </form>

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