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run code in 300+ PHP versions simultaneously
<?php class Test { public function __construct($x) { $this->x = $x; } public function printX($test) { print $test->x . PHP_EOL; } } $test1 = new Test(123); $test2 = new Test(345); $test1->printX($test2); $test2->printX($test1);
Output for 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.13
Deprecated: Creation of dynamic property Test::$x is deprecated in /in/uPIcm on line 7 Deprecated: Creation of dynamic property Test::$x is deprecated in /in/uPIcm on line 7 345 123
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33
345 123

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