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POEscaping special characters in Javascript to use them in MySql
 

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  1. POEscaping special characters in Javascript to use them in MySql
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    <p>I have gone through a variety of questions that have been asked with the same thing in mind but it doesn't seem to be working for me.</p> <p>I have a HTML textarea from which I collect the comments of a user and I'm storing them in a MySql database. So I want the special characters that are entered by the users to also be accepted without any error/exception and store them in the database as well.</p> <p>I came across a solution for the newline character and I added this line of code which works well.</p> <pre><code>var comment = document.getElementById("commentArea").value; comment = comment.replace(/\n/g, '&lt;br /&gt;'); </code></pre> <p>The other characters like <code>&amp;$%#(</code> are all getting inserted without any problem except for quotes. I'm not sure what should I do to escape them. I tried <code>comment.replace("\'","&amp;39")</code> for escaping single quotes but that doesn't seem to work.</p> <p>How can I escape both single and double quotes? Thanks in advance.</p> <p><strong>EDIT</strong>: I'm using Jsp and Servlets for my application. Should I escape these characters in the servlet then?</p> <p><strong>Let me know the reason before downvoting.</strong></p> <p><strong>Update</strong>: As suggested in the answers and comments, I used a prepared statement and passed the string using the <code>setString()</code> method. However, the problem still persists.</p> <p>The code snippet I've used is:</p> <pre><code>String query = "insert into db_name (column1,column2,column3,column4) values("SomeValue1","SomeValue2",?,"SomeValue3")"; st=conn.prepareStatement(query); st.setString(1,"String_from_TextArea"); int rows = st.executeUpdate(); </code></pre>
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    1. USAnjan Baradwaj
    1. USAnjan Baradwaj
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      1. VTDownMod
    1. COWhat driver you use? NodeJs, PHP? You must escape the value on the server side(not the client side).
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      1. USAndrew
    2. COForget about doing this on the client side. Within the server-side code you need to use mysqli_real_escape_string before writting the comment to the database.
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      1. USjeff
    3. COThis really should be done on the server-side, rather than the client side. For instance, if you are using PHP, then you can escape the string using PHP's addslashes: http://cl1.php.net/addslashes If this is not an option, why must it be done by the client?
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      1. USMatt
 

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