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  1. <?php
  2.  
  3. $courses = array('teste', 'teste2', 'testexyz','teste3', 'teste', 'testexyz');
  4. function get_duplicates( $array ) {
  5.     return array_unique( array_diff_assoc( $array, array_unique( $array ) ) );
  6. }
  7. $list = get_duplicates($courses);
  8.  
  9. print_r($list);
Success #stdin #stdout 0s 52488KB
comments (?)
stdin
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Standard input is empty
stdout
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Array
(
    [4] => teste
    [5] => testexyz
)
https://ideone.com/GPk2sC
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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