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<?php class Obj { public function runAfter($callback) { $arg = microtime(); // Something random $callback($arg); } } $obj = new Obj(); for($i=0; $i<=3; $i++) { $obj->runafter(function($arg) use($i) { echo "$i is done and arg is $arg\n"; }); }

This is an error 500

Value for `_results` contains invalid data `array`


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