How safe this website willbe

which one way the website will be safe? Can you tell me little more detail about it.

Thanks Brian. My concern is I have a contact form so data(email, name, message) is coming in from the user. On goggling form security I found many ways a malicious attach could happen. I understand my query is vague this is because of lack of knowledge of PHP. I have done the form as per the tutorial so I would like to know what else in terms of data validation/ sanitization I need to do. Particularly do I have to escape every " ?

Thanks in advance for your help. Cheers!

<?php $pageTitle = "Julie Dahl-Contact"; $section = "contact" ; include ('inc/header.php'); ?>

<script type="text/javascript"> var RecaptchaOptions = { theme : 'custom', custom_theme_widget: 'responsive_recaptcha' }; </script>

<section id="formContainer"> <h3>I would love to hear from you ..</h3> <p>Phone me on 0402 226 857 <br> or <br> Send me an email... </p> <form action="php/contact.php" method="post" name ="jdform" id="form" onSubmit="MM_validateForm('name','','R');return document.MM_returnValue">

<input name="name" type="text" required class="txtinput" id="name" tabindex="1" value="Your name"> <input name="email" type="email" required class="txtinput" id="email" tabindex="2" value="Your e-mail address" size="40" maxlength="40"> <textarea name="message" class="txtblock" id="message" tabindex="3">Your message..</textarea>

<div id="responsive_recaptcha" style="display:none">

   <div id="recaptcha_image"></div>
   <div class="recaptcha_only_if_incorrect_sol" style="color:red">Incorrect please try again</div>

  <label class="solution">
    <span class="recaptcha_only_if_image">Type the two words:</span>
    <span class="recaptcha_only_if_audio">Enter the numbers you hear:</span>

    <input type="text" id="recaptcha_response_field" name="recaptcha_response_field" />
  </label>
  <div class="options">
    <a href="javascript:Recaptcha.reload()" id="icon-reload">Get another CAPTCHA</a>
    <a class="recaptcha_only_if_image" href="javascript:Recaptcha.switch_type('audio')" id="icon-audio">Get an audio CAPTCHA</a>
    <a class="recaptcha_only_if_audio" href="javascript:Recaptcha.switch_type('image')" id="icon-image">Get an image CAPTCHA</a>
    <a href="javascript:Recaptcha.showhelp()" id="icon-help">Help</a>
  </div>
</div>

<script type="text/javascript" src="http://www.google.com/recaptcha/api/challenge?k=6LckTu4SAAAAAP-5MVrN6WZPfLQ4mRyg-Kva6CPG"> </script>

<noscript> <iframe src="http://www.google.com/recaptcha/api/noscript?k=6LckTu4SAAAAAP-5MVrN6WZPfLQ4mRyg-Kva6CPG" height="300" width="500" frameborder="0"></iframe><br> <textarea name="recaptcha_challenge_field" rows="3" cols="40"> </textarea> <input type="hidden" name="recaptcha_response_field" value="manual_challenge"> </noscript>

  <section id="buttons">

<input type="submit" name="submit" id="submitbtn" class="submitbtn" tabindex="7" value="Submit this !">
<br style="clear:both;">

    </section>

</form> </section><!--eof formcontainer-->

<?php include ('inc/footer.php');

I have resolved web security issues