php - How to minimise code and avoid repetition? -


i learning php.

i want calculate number of absent students in class in subjects in examination.

i have used following code extract data 1 class , 2 subjects.

i want calculate number of absent students 4 classes , 27 subjects how achieve using minimum code , avoiding repetition? 

<?php   /*query calculate number of absent students in fyba in 6 subjects.    counting studid (student id)    economics = marks1e*/   $e = mysql_query('select count(studid) examdbf1 exam_id =   14153 , faculty = 1 , sem = 1 , repeater = 1 , marks1e = \'aa\'');  $ea = mysql_fetch_array($e);  echo '<br>'. $ea['count(studid)'] . '<br>';   /*marathi optional = marks2e*/   $mo = mysql_query('select count(studid) examdbf1 exam_id = 14153 , faculty = 1 , sem = 1 , repeater = 1 , marks2e = \'aa\'');  $moa = mysql_fetch_array($mo);  echo '<br>'. $moa['count(studid)'] . '<br>';

using code comment, change ***marks1e*** $m[$x] -

$m = array("marks1e", "marks2e", "marks3e", "marks4e", "marks5e", "marks6e");  $mcount = count($m);  for($x = 0; $x < $mcount; $x++) {      $e = mysql_query('select count(studid) examdbf1 exam_id = 14153 , faculty = 1 , sem = 1 , repeater = 1 , '.$m[$x].' = \'aa\'');      $ea = mysql_fetch_array($e);      echo '<br>'.$m[$x].': '. $ea['count(studid)'] . '<br>'; }

similarly, since changing value $m, foreach() -

$m = array("marks1e", "marks2e", "marks3e", "marks4e", "marks5e", "marks6e");  foreach($m $n) {      $e = mysql_query('select count(studid) examdbf1 exam_id = 14153 , faculty = 1 , sem = 1 , repeater = 1 , '.$n.' = \'aa\'');      $ea = mysql_fetch_array($e);      echo '<br>'.$n.': '. $ea['count(studid)'] . '<br>'; }

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