php - Find min/max of complex 2D array -


php not language please bear me.

i have (in opinion) poorly designed 2d array of product categories , min/max of 2 ratings per sub-category. sadly, cannot change layout of array:

[[category, subcategory, overallrating, extrarating]]

for example, sample data this:

[["fridges",         "samsung", 5, 6],  ["fridges",         "samsung", 2, 1],  ["fridges",         "samsung", 3, 4],  ["fridges",         "lg",      7, 5],  ["washing machine", "letto",   5, 6],  ["washing machine", "samsung", 5, 6],  ["fridges",         "samsung", 4, 4]]

the output of should give me data such that:

fridges, samsung: 2/5, 1/6 fridges, lg: 7/7, 5/5 (or 7, 5) washing machine, letto: 5, 6 (see above) washing machine, samsung: 5, 6 (see above)

try this

<?php  $your_array = array(array("fridges", "samsung", 5, 6), array("fridges", "samsung", 2, 1), array("fridges", "samsung", 3, 4), array("fridges", "lg", 7, 5), array("washing machine", "letto", 5, 6), array("washing machine", "samsung", 5, 6), array("fridges", "samsung", 4, 4));  $arr_temp = array(); foreach($your_array $key=>$arr) {      $category = $arr[0];      $sub_category = $arr[1];      $overall_rating = $arr[2];      $extra_rating = $arr[3];       if(isset($arr_temp[$category][$sub_category]['overall']))      {         $overall_min =  $arr_temp[$category][$sub_category]['overall']['min'];         $overall_max =  $arr_temp[$category][$sub_category]['overall']['max'];          if($overall_rating<$overall_min)         {             $arr_temp[$category][$sub_category]['overall']['min'] = $overall_rating;         }         if($overall_rating>$overall_max)         {             $arr_temp[$category][$sub_category]['overall']['max'] = $overall_rating;         }       }      else      {         $arr_temp[$category][$sub_category]['overall']['min'] = $overall_rating;         $arr_temp[$category][$sub_category]['overall']['max'] = $overall_rating;      }        if(isset($arr_temp[$category][$sub_category]['extra']))      {         $extra_min =  $arr_temp[$category][$sub_category]['extra']['min'];         $extra_max =  $arr_temp[$category][$sub_category]['extra']['max'];          if($extra_rating<$extra_min)         {             $arr_temp[$category][$sub_category]['extra']['min'] = $extra_rating;         }         if($extra_rating>$extra_max)         {             $arr_temp[$category][$sub_category]['extra']['max'] = $extra_rating;         }       }      else      {         $arr_temp[$category][$sub_category]['extra']['min'] = $extra_rating;         $arr_temp[$category][$sub_category]['extra']['max'] = $extra_rating;      }   }  foreach($arr_temp $category=>$arr1) {     foreach($arr1 $sub_category=>$arr2)     {         echo $category.",".$sub_category.":".$arr2['overall']['min']."/".$arr2['overall']['max'].",".$arr2['extra']['min']."/".$arr2['extra']['max'];         echo "\n";     } } ?>

output :

fridges,samsung:2/5,1/6 fridges,lg:7/7,5/5 washing machine,letto:5/5,6/6 washing machine,samsung:5/5,6/6

demo


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