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run code in 300+ PHP versions simultaneously
<?php class A1 { var $s; protected function a () { $i =0 ; while (true) { $i++; if ($i > 10000) { break; } foreach ([['a' => 1],2, ['a' => 2]] as $p) { if ($p == 2) { continue; } if ($i %100 == 0) { $this->s .= str_repeat('0123456789', 1000000); } yield $p['a'] => 123; } } } public function b(){ $sum = 0; foreach ( $this->a() as $k => $v ) { $sum += $k + $v; } echo 'Done: ', $sum; }} (new A1)->b();

preferences:
50.49 ms | 402 KiB | 5 Q