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<?php echo preg_replace_callback('/(\w+) (\w+)/', function($matches) { var_dump($matches); return strtoupper($matches);},'rodrigo capile rodrigo capile rodrigo capile');
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(3) { [0]=> string(14) "rodrigo capile" [1]=> string(7) "rodrigo" [2]=> string(6) "capile" } Fatal error: Uncaught TypeError: strtoupper(): Argument #1 ($string) must be of type string, array given in /in/vKr0L:4 Stack trace: #0 /in/vKr0L(4): strtoupper(Array) #1 [internal function]: {closure}(Array) #2 /in/vKr0L(2): preg_replace_callback('/(\\w+) (\\w+)/', Object(Closure), 'rodrigo capile ...') #3 {main} thrown in /in/vKr0L on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
array(3) { [0]=> string(14) "rodrigo capile" [1]=> string(7) "rodrigo" [2]=> string(6) "capile" } Fatal error: Uncaught TypeError: strtoupper(): Argument #1 ($string) must be of type string, array given in /in/vKr0L:4 Stack trace: #0 /in/vKr0L(4): strtoupper(Array) #1 [internal function]: {closure}(Array) #2 /in/vKr0L(4): preg_replace_callback('/(\\w+) (\\w+)/', Object(Closure), 'rodrigo capile ...') #3 {main} thrown in /in/vKr0L on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
array(3) { [0]=> string(14) "rodrigo capile" [1]=> string(7) "rodrigo" [2]=> string(6) "capile" } Warning: strtoupper() expects parameter 1 to be string, array given in /in/vKr0L on line 4 array(3) { [0]=> string(14) "rodrigo capile" [1]=> string(7) "rodrigo" [2]=> string(6) "capile" } Warning: strtoupper() expects parameter 1 to be string, array given in /in/vKr0L on line 4 array(3) { [0]=> string(14) "rodrigo capile" [1]=> string(7) "rodrigo" [2]=> string(6) "capile" } Warning: strtoupper() expects parameter 1 to be string, array given in /in/vKr0L on line 4
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/vKr0L on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/vKr0L on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/vKr0L on line 2
Process exited with code 255.

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