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  1. <?php
  2.  
  3. $arr = array();
  4. $obj = new stdClass;
  5.  
  6. echo $undefined;
  7. echo $arr['undefined'];
  8. echo $obj->undefined;
Success #stdin #stdout #stderr 0.01s 20568KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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PHP Notice:  Undefined variable: undefined in /home/xj4rLM/prog.php on line 6
PHP Notice:  Undefined index: undefined in /home/xj4rLM/prog.php on line 7
PHP Notice:  Undefined property: stdClass::$undefined in /home/xj4rLM/prog.php on line 8
https://ideone.com/k60gaK
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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