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<?php function fn1() { echo 'hello'; } call_user_func_array('fn 1', array());
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "fn 1" not found or invalid function name in /in/nfZNB:7 Stack trace: #0 {main} thrown in /in/nfZNB on line 7
Process exited with code 255.
Output for 8.0.0 - 8.0.9
Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($function) must be a valid callback, function "fn 1" not found or invalid function name in /in/nfZNB:7 Stack trace: #0 {main} thrown in /in/nfZNB on line 7
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 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'fn 1' not found or invalid function name in /in/nfZNB on line 7
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: call_user_func_array(): First argument is expected to be a valid callback, 'fn 1' was given in /in/nfZNB on line 7
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Warning: call_user_func_array(): First argumented is expected to be a valid callback, 'fn 1' was given in /in/nfZNB on line 7
Output for 4.3.0 - 4.3.1
Warning: call_user_func_array() [http://www.php.net/function.call-user-func-array]: First argumented is expected to be a valid callback, 'fn 1' was given in /in/nfZNB on line 7

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