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POPHP: Creating big HTML-table efficiently
 

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    <p>I'm making a HTML table based on certain information in my MySQL database. The tables I need from the database hold the data for rows (<em>rowid</em>, <em>rowname</em>), columns (<em>columnid</em>, <em>columnname</em>) and cell data. A table, that links IDs from rows and columns together (<em>cellid</em>, <em>rowid</em>, <em>columnid</em>, <em>somedata</em>). The table looks something like this:</p> <pre><code>__________| column1 | column2 | column3 | ... row1 | somedata | somedata | | ----------|----------|----------|----------|----- row2 | somedata | | somedata | ----------|----------|----------|----------|----- ... | | | | </code></pre> <p>My approach was to use several nested foreach loops, something like this:</p> <pre><code>$rows = new Rows(); //These objects are containers for objects $columns = new Columns(); //that hold some of the database data. $alldata = new Alldata(); //MySQL queries within these objects are irrelevant, I think. They already get the relevant data $count = count($alldata); echo "&lt;table&gt;"; echo "&lt;tr&gt;"; echo "&lt;td&gt;&amp;nbsp;&lt;/td&gt;"; foreach ($columns-&gt;getColumns() as $column) { echo "&lt;td&gt;".$column-&gt;getColumnname()."&lt;/td&gt;"; } echo "&lt;/tr&gt;"; foreach ($rows-&gt;getRows() as $row) { echo "&lt;tr&gt;"; echo "&lt;td&gt;".$row-&gt;getRowname()."&lt;/td&gt;"; foreach ($columns-&gt;getColumns() as $column) { $last = 1; foreach ($alldata-&gt;getAlldata() as $data) { if ($data-&gt;getCID() == $column-&gt;getID() &amp; $data-&gt;getRID() == $row-&gt;getID()) { //If the column has data the related to the row echo "&lt;td&gt;".$data-&gt;getSomedata()."&lt;/td&gt;"; break; } if ($last == $count) { //if loop couldn't find any entries, it prints an empty cell echo "&lt;td&gt;&amp;nbsp;&lt;td&gt;"; } $last++ } } echo "&lt;/tr&gt;"; } echo "&lt;/table&gt;"; </code></pre> <p>Bruteforcing, obviously this is not very efficient method when there are several hundred rows of data on any table in the database and I don't like this. <strong>Any ideas how to make this more efficient? Is there better way of creating a table like I need?</strong></p> <p>EDIT:<br> Pondering about this problem for a week has finally given me some answers. It was so simple!<br> I did a slight modification to my <em>Column</em> object class. Previously, my code went through all possible entries on <em>celldata</em> table in the database. Now <em>Column</em> object gets an array of <em>celldata</em> where <em>columnid's</em> match and I can do the comparison using only that data.</p> <pre><code>$rows = new Rows(); $columns = new Columns(); echo "&lt;table&gt;"; echo "&lt;tr&gt;"; echo "&lt;td&gt;&amp;nbsp;&lt;/td&gt;"; foreach ($columns-&gt;getColumns() as $column) { echo "&lt;td&gt;".$column-&gt;getColumnname()."&lt;/td&gt;"; } echo "&lt;/tr&gt;"; foreach ($rows-&gt;getRows() as $row) { echo "&lt;tr&gt;"; echo "&lt;td&gt;".$row-&gt;getRowname()."&lt;/td&gt;"; foreach ($columns-&gt;getColumns() as $column) { $last = 1; $count = count($column-&gt;getAlldata()); foreach ($column-&gt;getAlldata() as $data) { if ($data-&gt;getCID() == $column-&gt;getID() &amp; $data-&gt;getRID() == $row-&gt;getID()) { echo "&lt;td&gt;".$data-&gt;getSomedata()."&lt;/td&gt;"; break; } if ($last == $count) { echo "&lt;td&gt;&amp;nbsp;&lt;td&gt;"; } $last++ } } echo "&lt;/tr&gt;"; } echo "&lt;/table&gt;"; </code></pre> <p>Much faster, although still bruteforcing but there's less amount of data to go through. Of course, now the problem is that <em>Column</em> objects may do quite a lot of MySQL queries, depending on how many <em>Columns</em> there are.</p>
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    3. CO@eggyal rows and columns are sorted by their name, so no.
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