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PHP implementation code for obtaining repeated data in an array

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Release: 2016-07-25 08:55:25
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  1. function FetchRepeatMemberInArray($array) {
  2. // Get an array with duplicate data removed
  3. $unique_arr = array_unique ( $array );
  4. // Get an array with duplicate data
  5. $repeat_arr = array_diff_assoc ( $array, $unique_arr );
  6. return $repeat_arr;
  7. }
  8. // Test case
  9. $array = array (
  10. 'apple',
  11. 'iphone',
  12. 'miui',
  13. 'apple',
  14. 'orange' ,
  15. 'orange'
  16. );
  17. $repeat_arr = FetchRepeatMemberInArray ( $array );
  18. print_r ( $repeat_arr );
  19. ?>
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Example 2, use two custom functions to implement this function times for loop.

  1. function FetchRepeatMemberInArray($array) {
  2. $len = count ( $array );
  3. for($i = 0; $i < $len; $i ++) {
  4. for($j = $i + 1; $j < $len; $j ++) {
  5. if ($array [$i] == $array [$j]) {
  6. $repeat_arr [] = $array [$i];
  7. break;
  8. }
  9. }
  10. }
  11. return $repeat_arr;
  12. }
  13. // Test case
  14. $array = array (
  15. 'apple',
  16. 'iphone',
  17. 'miui',
  18. ' apple',
  19. 'orange',
  20. 'orange'
  21. );
  22. $repeat_arr = FetchRepeatMemberInArray ( $array );
  23. print_r ( $repeat_arr );
  24. ?>
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