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  1. <?php
  2.  
  3. // your code goes here
  4.  
  5. var_dump(filter_var("0", FILTER_VALIDATE_DOMAIN,FILTER_FLAG_HOSTNAME));
  6. var_dump(filter_var('test', FILTER_VALIDATE_DOMAIN,FILTER_FLAG_HOSTNAME));
  7. var_dump(filter_var('test test', FILTER_VALIDATE_DOMAIN,FILTER_FLAG_HOSTNAME));
  8. var_dump(filter_var('@', FILTER_VALIDATE_DOMAIN,FILTER_FLAG_HOSTNAME));
  9. var_dump(filter_var('🐲', FILTER_VALIDATE_DOMAIN,FILTER_FLAG_HOSTNAME));
  10. var_dump(filter_var('asd.com', FILTER_VALIDATE_DOMAIN,FILTER_FLAG_HOSTNAME));
  11. var_dump(filter_var('?asd.asd.com', FILTER_VALIDATE_DOMAIN,FILTER_FLAG_HOSTNAME));
  12.  
Success #stdin #stdout 0.02s 25844KB
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stdin
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Standard input is empty
stdout
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string(1) "0"
string(4) "test"
bool(false)
bool(false)
bool(false)
string(7) "asd.com"
bool(false)
https://ideone.com/qw7Ixs
language:
PHP (php 7.3.5)
created:
1 day ago
visibility:
public

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