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How to get which character appears most often in a string

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Release: 2016-07-25 09:01:57
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How to get which character appears most often in a stringReprint address: http://blog.qita.in/?post=467
  1. $str=”asdfgfdas323344##$$fdsdfg*$**$*$**$$443563536254fas”;//Any length string
  2. //Solution one (the fastest solution, but the basic skills must be solid )
  3. $arr=str_split($str);
  4. $arr=array_count_values($arr);
  5. arsort($arr);
  6. print_r($arr);
  7. //Solution 2 (certain requirements for logical ability)
  8. $arr=str_split($str);
  9. $con=array();
  10. foreach ($arr as $v){
  11. if (!@$con[$v]){
  12. @$con[$v]=1 ;
  13. }else{
  14. @$con[$v]++;
  15. }
  16. }
  17. arsort($con);
  18. print_r($con);
  19. //Solution 3
  20. $arr=str_split($str);
  21. $unique=array_unique($arr);
  22. foreach ($unique as $a){
  23. $arr2[$a]=substr_count($str, $a);
  24. }
  25. arsort($arr2);
  26. print_r($arr2 );
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