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run code in 300+ PHP versions simultaneously
<?php function id($x) { return $x; } class A { function foo() { echo 'a'; } } var_dump(PHP_VERSION_ID); if (PHP_VERSION_ID < 50400) { return id(new A())->foo(); } return (new A())->foo();
Output for git.master, git.master_jit, rfc.property-hooks
int(80300) a

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