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- echo call_user_func(call_user_func(function ($func) {
- return call_user_func(function ($f) use ($func) {
- return call_user_func(function ($g) use ($f) {
- return function ($n) use ($f, $g) {
- return call_user_func($g($f($f)), $n);
- };
- }, $func);
- }, function ($f) use ($func) {
- return call_user_func(function ($g) use ($f) {
- return function ($n) use ($f, $g) {
- return call_user_func($g($f($f)), $n);
- };
- }, $func);
- });},
- function ($h) { /* Fibonacci */
- return function ($n) use ($h) {
- return ($n <= 2) ? 1 : ($h($n - 2) + $h($n - 1));
- };
- }), 10);
- echo "\n";
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