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run code in 300+ PHP versions simultaneously
<?php echo memory_get_usage(), "\n"; $a = 'value1'; $b = 'value2'; $c = 'value3'; $x = 'value1'; $y = 'value2'; $z = 'value3'; echo memory_get_usage(), "\n";

preferences:
57.5 ms | 798 KiB | 5 Q