W3School TIY Editor
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<!DOCTYPE html> <html> <body> <?php $cars=array ( "Volvo"=>array ( "XC60", "XC90" ), "BMW"=>array ( "X3", "X5" ), "Tesla"=>array ( "ModelY" ) ); echo "普通计数: " . sizeof($cars)."<br>"; echo "递归计数: " . sizeof($cars,1); ?> </body> </html>