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POPHP array comparison with different lengths
 

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    <p>I need to compare values from 2 arrays that are not always the same size, each containing either a login or a logout time. I need to get the time difference total or time logged in between these values. Where I am getting caught is the logout result is usually smaller then the login. I tried the following but it isn't accurate at all.</p> <pre><code>$offset = 0; for($i=0;$i&lt;sizeof($login_ary);$i++){ //unset($time_logged); $time_logged = Array(); while( (int)$login_ary[$i] &gt; (int)$logout_ary[$i] ) { $offset++; } $time_logged['login'] = $login_ary[$i] + $offset; $time_logged['logout'] = $logout_ary[$i]; $calc_ary[] = $time_logged; } $time_logged_in = "undefined"; </code></pre> <p>End result I need to get either an array with lined up login/logoffs or a calculation of the total time difference between the login time and then logout time. But I have to exclude logins that don't have an associated logout.</p> <p><strong>EDITS</strong> </p> <p>1) Times inside of the arrays are unix timestamps 2) the arrays aren't static as this is done inside a loop for each user in a result set so the var_dump would look something like the following</p> <p>login_arr</p> <blockquote> <p>Array([0] => '1385402632',[1] => '1385763384',[2] => '1387293992') </p> </blockquote> <p>logout_arr</p> <blockquote> <p>Array([0] => '1387294012')</p> </blockquote> <p>** MY SOLUTION **</p> <p>My solution is out of context of the original question which is why I posted it as an edit instead of an answer. But here is what I did, the simplicity of it makes me feel foolish that I didn't think of it originally. What I did, is write the session timeout into the logout_ary since the data was going to be unrepresented otherwise, we decided that fudging a time was better then completely avoiding it. So I took the login time and fudged a logout time and spliced it into the array at the same point. I still would like to know the true answer to this problem if there is one though.</p> <pre><code> for($i=0;$i&lt;sizeof($login_ary);$i++){ //unset($time_logged); $time_logged = Array(); if( (int)$login_ary[$i] &gt; (int)$logout_ary[$i] ) { array_splice($logout_ary,$i,0,$login_ary[$i]+$session_length); $time_logged['login'] = $login_ary[$i]; $time_logged['logout'] = $logout_ary[$i]; } else { $time_logged['login'] = $login_ary[$i]; $time_logged['logout'] = $logout_ary[$i]; } $calc_ary[] = $time_logged; } </code></pre>
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    1. USGrimnoff
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    1. COIsn't it possible to do this calculation when fetching the data from the database?
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      1. USChris
    2. COcan you post `var_dump` examples of these arrays so we can get a better idea of their structure? it'll help clarify your question and allow us answer your question better.
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      1. USDarragh Enright
    3. COspecifically, we would really need to know what format the times are saved in. I would assume a unix timestamp, but it could be anything: `H:i:s`, `h:i:s` or something else. clarification will help.
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      1. USDarragh Enright
 

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