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  1. <?php
  2. $input = [];
  3. echo 'Enter the input data, to complete the data entry enter a blank line' . PHP_EOL;
  4. while (($line = fgets(STDIN)) !== false) {
  5.     $line = rtrim($line, "\r\n");
  6.     if ($line === '') {
  7.         break;
  8.     }
  9.     $input[] = strtolower($line);
  10. }
  11.  
  12. $output = [];
  13. echo 'Output:' . PHP_EOL;
  14. foreach($input as $line) {
  15.     $chars = count_chars($line,1);
  16.     if (in_array(2, $chars)) {
  17.         echo $line . PHP_EOL;
  18.     }
  19. }
Success #stdin #stdout 0.03s 25500KB
comments (?)
stdin
copy 
asdf
fdas
asds
d fm
dfaa
aaaa
aabb
aaabb
stdout
copy 
Enter the input data, to complete the data entry enter a blank line
Output:
asds
dfaa
aabb
aaabb
https://ideone.com/7wiDTn
language:
PHP (php 7.3.5)
created:
3 days ago
visibility:
public

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