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<?php // lib 1 code: interface Lib1Interface { // name was originally $myparam, but has been changed. public function method($mychangedparam); } // lib 2 code: class Lib2Implementation implements Lib1Interface { public function method($myparam) { echo $myparam; } } // your code: class MyImplementation implements Lib1Interface { public function method($mychangedparam) { echo $mychangedparam; } } function doStuff(Lib1Interface $interface) { // named params can't be used here because of implementation details elsewhere. this is very opaque. $interface->method(mychangedparam: 42); } doStuff(new Lib2Implementation()); doStuff(new MyImplementation());
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.25, 8.4.1 - 8.4.12
Fatal error: Uncaught Error: Unknown named parameter $mychangedparam in /in/XSSo9:31 Stack trace: #0 /in/XSSo9(34): doStuff(Object(Lib2Implementation)) #1 {main} thrown in /in/XSSo9 on line 31
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught Error: Unknown named parameter $mychangedparam in /in/XSSo9:31 Stack trace: #0 /in/XSSo9(34): doStuff(Object(Lib2Implementation)) #1 {main} thrown in /in/XSSo9 on line 31
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Parse error: syntax error, unexpected ':', expecting ')' in /in/XSSo9 on line 31
Process exited with code 255.

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