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  1. <?php
  2.  
  3. $array = array(10, 30, 10, 40, 40);
  4. $copia = array_unique($array);
  5. if(count($copia) != count($array)) {
  6.     echo "existem valores duplicados";
  7. }
Success #stdin #stdout 0.01s 20520KB
comments (?)
stdin 
Standard input is empty
stdout 
existem valores duplicados
https://ideone.com/eg3Qgk
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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