I would like to know the easiest way to extract the text from a database field and set it as the default text for a text area.
I am planning at the moment to assiign the field to a variable, and then using javascript set it as the default text, but I am unsure of how to do this last part.
In your PHP code, likely above your HTML:
// Database connection calls here...
$row = mysql_fetch_array();
$databaseField = $row["databaseField"];
And in your HTML:
<textarea name="databaseField" rows="5">
<?php= $databaseField ?>
</textarea>
If you're using a server-side language, it's not necessary to have the extra javascript step. You can simply populate the value of the "value" attribute. Here's an example using PHP:
<input type="text"
name="phoneNumber"
value="<?php print($phone_number_from_database); ?>" />
don't forget to escape your database contents!
<textarea id="foo">
<?php echo htmlspecialchars($databasefield); ?>
</textarea>
otherwise you'll get problems with content that includes html-tags like 'foo </textarea>bar baz'
. the bar baz
would escape your textarea! this could lead to cross site scripting security problems (if you allow user input) or at least broken html. i used to punish fellow students by opening countless new windows with javascript if they forgot to sanitize the entries in their learning-by-doing guestbook apps. windows with images no sane person evers wants to see . good times :)
htmlspecialchars turns <, >, ", &, ...
into entities ( <, >, ", &, ...
), preventing the content to break free.
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