Count the number of times that each number in this file appears again. how can this problem be solved?

Count the number of times that each number in this file repeats 1 to generate a 10000-line text file, one random number per row 2 count the number of repeated occurrences of each number in this file PHPcode for a more efficient method & lt ;? Counts the number of times each number appears in this file.
1. generate a 10000-line text file with one random number per line
2. count the number of times each number in this file appears again.

PHP code

  // Find a more efficient method
  "; Var_dump ($ tj); echo"

";

------ Solution --------------------
Make statistics based on your ideas. this is better,

PHP code

while($b=fgets($a)){        if(isset($list[$b]))    {        ++$list[$b];    }    else    {        $list[$b]    = 1;    }}