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  1. <?php
  2.  
  3. $words = "stack,overflow,em,portugûes";
  4. $palavras = explode(',', $words);
  5. $ocorrencias = array();
  6.  
  7. for($i = 0; $i < count($palavras); $i++){
  8.  
  9.     $palavra = $palavras[$i];
  10.  
  11.     // Se a chave não existir, crie-a com valor zero:
  12.     if (!isset($ocorrencias[$palavra])) {
  13.     	$ocorrencias[$palavra] = 0;
  14.     }
  15.  
  16.     $ocorrencias[$palavra]++;
  17.  
  18. }
  19.  
  20. print_r($ocorrencias);
Success #stdin #stdout 0.01s 82880KB
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stdin
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Standard input is empty
stdout
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Array
(
    [stack] => 1
    [overflow] => 1
    [em] => 1
    [portugûes] => 1
)
https://ideone.com/nbHvBo
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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