<?php
class Foo
{
public $callable;
}
class Bar
{
public function __invoke()
{
echo 'DO IT';
}
}
$foo = new Foo;
$foo->callable = [Bar::class, '__invoke'];
($foo->callable)();
Fatal error: Uncaught Error: Non-static method Bar::__invoke() cannot be called statically in /in/FQpuZ:18
Stack trace:
#0 {main}
thrown in /in/FQpuZ on line 18
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: Non-static method Bar::__invoke() cannot be called statically in /in/FQpuZ:18
Stack trace:
#0 {main}
thrown in /in/FQpuZ on line 18
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Parse error: syntax error, unexpected '(' in /in/FQpuZ on line 18
Process exited with code 255.
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/FQpuZ on line 17
Process exited with code 255.