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POStuck with php foreach loop - need to run the loop with the same key once more
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  1. POStuck with php foreach loop - need to run the loop with the same key once more
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    copied!<p>Well I'm stuck with this one. I have a foreach loop nested in another foreach loop. Now on certain conditions I need to run the outer loop once again with the same key. While there is this function prev($array), which would set the iterator to the previous position, this does not seem to work and the php docs says </p> <blockquote> <p>As foreach relies on the >internal array pointer, changing it within the loop may lead to unexpected behavior. </p> </blockquote> <p>The array I am working on is an associative array, so obviously I cannot easily switch to integer indexed iterations. </p> <pre><code> $arrLocalCopy = $this-&gt;arrPrintOut; $groupCounter = 0; foreach($this-&gt;arrPrintOut as $kOne =&gt; $rowA){ //first and last row contain titles and totals, so we skip them if($groupCounter &lt; 1 || $groupCounter == sizeof($this-&gt;arrPrintOut)-1 ){ $groupCounter++; continue; } $rowCounter = 0; foreach($arrLocalCopy as $k =&gt; $rowB){ //skip rows that are "before" the outer loops row, as we want to compare only rows below the row we compare to. if ($rowCounter &lt;= $groupCounter || $rowCounter == sizeof($arrLocalCopy)-1 ) { $rowCounter++; continue; } //If those values are the same, then values belong to the same group and must be summed together. if($rowA['t']==$rowB['t'] &amp;&amp; $rowA['y']==$rowB['y'] &amp;&amp; $rowA['g']==$rowB['g'] &amp;&amp; $rowA['q']==$rowB['q']) { //if values are the same, then data belongs to one group, lets group them together. $this-&gt;arrPrintOut[$kOne]['s'] += $rowB['s']; $this-&gt;arrPrintOut[$kOne]['b'] += $rowB['b']; $this-&gt;arrPrintOut[$kOne]['v'] += $rowB['v']; $this-&gt;arrPrintOut[$kOne]['r'] += $rowB['r']; $this-&gt;arrPrintOut[$kOne]['k'] += $rowB['k']; $this-&gt;arrPrintOut[$kOne]['n'] += $rowB['n']; $this-&gt;arrPrintOut[$kOne]['m'] += $rowB['m']; $this-&gt;arrPrintOut[$kOne]['l'] += $rowB['l']; unset($this-&gt;arrPrintOut[$k]); //row has been grouped to the current row, so we remove it from the array and from the copy. unset($arrLocalCopy[$k]); prev($this-&gt;arrPrintOut); //we need to run the outer loop with the same key again, as probably there is another row which could be grouped together with this row. $groupCounter--; } $rowCounter++; } $groupCounter++; } </code></pre>
 

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