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<?php class myclass { public function say_hello() { echo "Hello!"; } public function my_word() { call_user_func(array(self, "say_hello")); } } $c = new myclass(); $c->my_word();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Error: Undefined constant "self" in /in/f9Ym8:11 Stack trace: #0 /in/f9Ym8(17): myclass->my_word() #1 {main} thrown in /in/f9Ym8 on line 11
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant self - assumed 'self' (this will throw an Error in a future version of PHP) in /in/f9Ym8 on line 11 Hello!
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.1, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Notice: Use of undefined constant self - assumed 'self' in /in/f9Ym8 on line 11 Hello!
Output for 5.1.2 - 5.1.6, 5.2.0 - 5.2.17
Notice: Use of undefined constant self - assumed 'self' in /in/f9Ym8 on line 11 Strict Standards: Non-static method myclass::say_hello() cannot be called statically, assuming $this from compatible context myclass in /in/f9Ym8 on line 11 Hello!
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/f9Ym8 on line 4
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
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/f9Ym8 on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/f9Ym8 on line 4
Process exited with code 255.

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