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  1. <?php
  2.  
  3. $arr = array("test" => 1, "some" => 2);
  4. $key = 'test';
  5.  
  6. echo array_key_exists($key, $arr) ? "ключ $key есть" : 'ключа нет';
Success #stdin #stdout 0s 52488KB
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stdin
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Standard input is empty
stdout
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ключ test есть
https://ideone.com/H68pwa
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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