Building a “crosstab” or “pivot” table from an array in php

Question

I have an array of objects defined similarly to the below:

$scores = array();

// Bob round 1
$s = new RoundScore();
$s->Round_Name = \'Round 1\';
$s->         


        

Answer 1

As far as I can tell, PHP arrays are implemented as hash tables (so lookup/update should be pretty efficient) Will time efficiency even be a problem, anyway?

I would just do it the "simple" way:

$table = array();
$round_names = array();
$total = array();

foreach ($scores as $score)
{
    $round_names[] = $score->Round_Name;
    $table[$score->Player_Name][$score->Round_Name] = $score->score;
    $total[$score->Player_Name] += $score->score;
}

$round_names = array_unique($round_names);

foreach ($table as $player => $rounds)
{
    echo "$player\t";
    foreach ($round_names as $round)
        echo "$rounds[$round]\t";
    echo "$total[$player]\n";
}

(I know the arrays aren't properly initialized, but you get the idea)