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<?php $a = "Hello"; $b = function() { echo ",world"; }; $arr = [$a,$b]; array_walk($arr, function($v) { echo $v; });
Output for 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Hello Fatal error: Uncaught Error: Object of class Closure could not be converted to string in /in/emBE7:10 Stack trace: #0 [internal function]: {closure}(Object(Closure), 1) #1 /in/emBE7(9): array_walk(Array, Object(Closure)) #2 {main} thrown in /in/emBE7 on line 10
Process exited with code 255.
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27
Hello Fatal error: Uncaught Error: Object of class Closure could not be converted to string in /in/emBE7:10 Stack trace: #0 [internal function]: {closure}(Object(Closure), 1) #1 /in/emBE7(11): array_walk(Array, Object(Closure)) #2 {main} thrown in /in/emBE7 on line 10
Process exited with code 255.
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Hello Recoverable fatal error: Object of class Closure could not be converted to string in /in/emBE7 on line 10
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20
Hello Catchable fatal error: Object of class Closure could not be converted to string in /in/emBE7 on line 10
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/emBE7 on line 7
Process exited with code 255.
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/emBE7 on line 5
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/emBE7 on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/emBE7 on line 5
Process exited with code 255.

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