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<?php class Foo { function dyn(&$bing) { echo $bing . "\n"; $bing++; } static function sta(&$bing) { echo $bing . "\n"; $bing++; } } $a = 1; $cb = [new Foo, "dyn"]; $cb($a); // Fatal error //$cb = 'Foo::sta'; //$cb($a); $cb = ['Foo', 'sta']; $cb($a); echo $a; $a = 1; $cb = [new Foo, "dyn"]; call_user_func($cb, $a); $cb = 'Foo::sta'; call_user_func($cb, $a); $cb = ['Foo', 'sta']; call_user_func($cb, $a); echo $a;
Output for git.master, git.master_jit, rfc.property-hooks
1 2 3 Warning: Foo::dyn(): Argument #1 ($bing) must be passed by reference, value given in /in/kopkp on line 32 1 Warning: Foo::sta(): Argument #1 ($bing) must be passed by reference, value given in /in/kopkp on line 35 1 Warning: Foo::sta(): Argument #1 ($bing) must be passed by reference, value given in /in/kopkp on line 38 1 1

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