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  1. <?php
  2.  
  3. $arr = array(1, null, '' , 'teste');
  4.  
  5. var_dump(isset($arr[1]));
  6. var_dump(array_key_exists(1, $arr));
Success #stdin #stdout 0.02s 23756KB
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stdin
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Standard input is empty
stdout
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bool(false)
bool(true)
https://ideone.com/hwI9U8
language:
PHP (php 7.3.5)
created:
6 years ago
visibility:
public

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