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<?php class A { } class B extends A { public static function ab() { var_dump(self::class, static::class, parent::class); } public static function abc($class = self::class) { var_dump(self::class, static::class, parent::class, $class); } } class C extends B { public static function abc() { parent::abc(); } } $c = new C; C::ab(); $c->abc();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Declaration of C::abc() must be compatible with B::abc($class = 'B') in /in/r7NTZ on line 22
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Declaration of C::abc() should be compatible with B::abc($class = 'B') in /in/r7NTZ on line 22 string(1) "B" string(1) "C" string(1) "A" string(1) "B" string(1) "C" string(1) "A" string(1) "B"
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33
Warning: Declaration of C::abc() should be compatible with B::abc($class = 'B') in /in/r7NTZ on line 26 string(1) "B" string(1) "C" string(1) "A" string(1) "B" string(1) "C" string(1) "A" string(1) "B"
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Strict Standards: Declaration of C::abc() should be compatible with B::abc($class = 'B') in /in/r7NTZ on line 26 string(1) "B" string(1) "C" string(1) "A" string(1) "B" string(1) "C" string(1) "A" string(1) "B"
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected 'class' (T_CLASS), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' in /in/r7NTZ on line 11
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_CLASS, expecting T_STRING or T_VARIABLE or '$' in /in/r7NTZ on line 11
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_CLASS, expecting T_STRING or T_VARIABLE or '$' in /in/r7NTZ on line 11
Process exited with code 255.
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/r7NTZ on line 9
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/r7NTZ on line 9
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/r7NTZ on line 9
Process exited with code 255.
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