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    <p>Check out CI's upload library:</p> <p><a href="http://www.codeigniter.com/user_guide/libraries/file_uploading.html" rel="nofollow noreferrer">http://www.codeigniter.com/user_guide/libraries/file_uploading.html</a></p> <p>Let's first take a look at how to do a simple file upload without changing the filename:</p> <pre><code>$config['upload_path'] = './uploads/'; $config['allowed_types'] = 'jpg|jpeg|gif|png'; $this-&gt;upload-&gt;initialize($config); if ( ! $this-&gt;upload-&gt;do_upload()) { $error = $this-&gt;upload-&gt;display_errors(); } else { $file_data = $this-&gt;upload-&gt;data(); } </code></pre> <p>It's that simple and it works quite well.</p> <p>Now, let's take a look at the meat of your problem. First we need to get the file name from the $_FILES array:</p> <pre><code>$file_name = $_FILES['file_var_name']['name']; </code></pre> <p>Then we can split the string with a <code>_</code> delimiter like this:</p> <pre><code>$file_name_pieces = split('_', $file_name); </code></pre> <p>Then we'll have to iterate over the list and make a new string where all except the first spot have uppercase letters:</p> <pre><code>$new_file_name = ''; $count = 1; foreach($file_name_pieces as $piece) { if ($count !== 1) { $piece = ucfirst($piece); } $new_file_name .= $piece; $count++; } </code></pre> <p>Now that we have the new filename, we can revisit what we did above. Basically, you do everything the same except you add this $config param:</p> <pre><code>$config['file_name'] = $new_file_name; </code></pre> <p>And that should do it! By default, CI has the <code>overwrite</code> $config param set to <code>FALSE</code>, so if there are any conflicts, it will append a number to the end of your filename. For the full list of parameters, see the link at the top of this post.</p>
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    1. COworked ... thank you greatly
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    2. COGreat answer! That helps me alot.
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