Online PHP editor | output for rNLfl

Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Warning: Undefined variable $str in /in/rNLfl on line 12 Deprecated: preg_match_all(): Passing null to parameter #2 ($subject) of type string is deprecated in /in/rNLfl on line 12 Array ( [0] => Array ( ) [1] => Array ( ) )
Output for 8.0.0 - 8.0.30: Warning: Undefined variable $str in /in/rNLfl on line 12 Array ( [0] => Array ( ) [1] => Array ( ) )
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.26, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33: Notice: Undefined variable: str in /in/rNLfl on line 12 Array ( [0] => Array ( ) [1] => Array ( ) )
Output for 7.3.32 - 7.3.33: Array ( [0] => Array ( ) [1] => Array ( ) )
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3: Notice: Undefined variable: str in /in/rNLfl on line 12 Array ( [0] => Array ( ) [1] => Array ( ) )