Simple .csv file parser

In the following short snippet is an example of using PHP for simple parsing of .csv file / files comparing them and outputting the results in a third file. In this case itself it is not appropriate for use on live websites/apps since it is really inefficient, but I liked the simplicity and quick adaptability as a basis 🙂 The snippet uses only functions and libs from PHP itself (5.2+)

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        <pre class="brush: php; title: ; notranslate" title="">

<?php

$all_acc_file = fopen('big_original_file.csv', 'r'); // test matchingdatacheck.csv
$result_file = fopen("result.csv","w");

$i = 0;
$result_found=0;
while (($line = fgetcsv($all_acc_file)) !== FALSE) {
  //$line is an array of the csv elements
  //print_r($line);
  $file_missmatch = fopen('comparison_table.csv', 'r');
  while (($linemiss = fgetcsv($file_missmatch)) !== FALSE) {

  //matching in this example twelth or seventh entry beetwen a line in big_original_file.csv and a line in comparison_table.csv
  if($line[11] == $linemiss[11] || $line[6] == $linemiss[6]){
    $result_arr = array($linemiss[2] , $linemiss[3] , $line[2] , $line[3],$line[11],$line[6]);
    $result_found=1;
   }
 }

 if($result_found==1){
  fputcsv($result_file, $result_arr);
 }

 fclose($file_missmatch);
 $i++; echo"$i\n";
 $result_found=0;
}

fclose($all_acc_file);
fclose($result_file);</pre>
</pre>
        
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