PHP - Aligning tabs, finding emails in string, remove empty columns from csv/data-grid array ..

.php

<?php

// PRINT TAB ALIGNED COLUMNS

	// %- and % are left and right aligns
	$mask = "| %-30.30s | %10.10s | %10.10s |\n";
	printf($mask, 'Host' , 'Results', 'Share');
	printf($mask, $test_host, $total_results, $share_round);


// FIND ALL EMAILS IN A STRING
function find_all_emails($content){
    $qtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]';
    $dtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]';
    $atom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c'.
      '\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+';
    $quoted_pair = '\\x5c[\\x00-\\x7f]';
    $domain_literal = "\\x5b($dtext|$quoted_pair)*\\x5d";
    $quoted_string = "\\x22($qtext|$quoted_pair)*\\x22";
    $domain_ref = $atom;
    $sub_domain = "($domain_ref|$domain_literal)";
    $word = "($atom|$quoted_string)";
    $domain = "$sub_domain(\\x2e$sub_domain)*";
    $local_part = "$word(\\x2e$word)*";
    $addr_spec = "$local_part\\x40$domain";

    preg_match_all("/$addr_spec/", $content, $matches);

    return $matches[0];
}

credit: http://www.iamcal.com/publish/articles/php/parsing_email/

 // remove empty 'columns' from a grid (array of arrays)
 $emptyCols = [];
  // remove empty columns
  foreach ($data as $row => $rowData){
      $firstRow = $row === 0;
      foreach($rowData as $cell => $cellData){
        if(empty($cellData) && $firstRow){
          $emptyCols[] = $cell;
        }elseif(!$firstRow && !empty($cellData) && in_array(  $cell, $emptyCols)) {
          unset($emptyCols[array_search($cell, $emptyCols)]);
        }
      }
  }

  rsort($emptyCols, SORT_NUMERIC);

  foreach($emptyCols as $cell){
    foreach($data as $row => $rowData){
      unset($data[$row][$cell]);
      $data[$row] = array_values($data[$row]);
    }
  }