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  1. <?php
  2.  
  3. $foo = '';
  4. var_dump(isset($foo));
Success #stdin #stdout 0.02s 25764KB
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stdin
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Standard input is empty
stdout
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bool(true)
https://ideone.com/gzi1t5
language:
PHP (php 7.3.5)
created:
1 year ago
visibility:
secret

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