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POManaging php sessions on multiple file uploads
 

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    <p>I'm working in a multiple image upload social web app. I'm assigning a <code>$_session['file_id']</code> to each uploaded file as an array index (file id comes from db). But I only want users to upload a maximum of 4 images per post. So I'm counting the <code>images.length</code> before upload, and if it's <code>== 4</code>, alerting the user he can't upload more files at the same time, else, the normal upload happens. For security purposes I have an <code>unset($_session['file_id'])</code> for making sure the 4 files won't be uploaded on errors, or user changes on javascript (a <code>for</code> loop on every upload, to count <code>$_session['file_id'])</code>. The problem I'm having is that the js itself ain't enought to make sure the file ain't uploaded 4 times, I guess ajax upload stay on queue, and check for file number before the 4th file is uploaded. Is there any other approach I can use direct on php, remembering I can't unset files for common users (4 files are already upload and waiting for send button), but I need plus to unset files if user reflesh, or quit the page? Thank your for your time.</p> <p><strong>JavaScript</strong></p> <pre><code>var checkfilecount = 0; $('#file').change(function() { checkfilecount++; checkfile = $("#images).length; if (checkfile &lt; 4 &amp;&amp; checkfilecount &lt; 4) { $("#filesend").submit(); } else { setTimeout(function(){ alert("Sorry, You can`t upload too many files at once") },3000) } }) </code></pre> <p>and on #postsend:</p> <pre><code>checkfilecount = 0; </code></pre> <p><strong>PHP</strong></p> <pre><code>if (isset($_SESSION['files_id'])) { $counting = 0; foreach($_SESSION['files_id'] as $key =&gt; $val) { $counting++; if ($counting == 4) { unset($_SESSION['files_id']); exit("error on session array"); } } } </code></pre>
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    1. USMarty McVry
    1. USsagits
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    1. COEdit your post and add code.
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      1. USThew
    2. COLine 4: `checkfile = $("#images).length;` misses a `"` at the end of `$('#images)`, it needs to be `$("#images")`.
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