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<!DOCTYPE html> <html> <body> <?php $a = 32; echo var_dump($a) . "<br>"; $b = "Hello world!"; echo var_dump($b) . "<br>"; $c = 32.5; echo var_dump($c) . "<br>"; $d = array("red", "green", "blue"); echo var_dump($d) . "<br>"; $e = array(32, "Hello world!", 32.5, array("red", "green", "blue")); echo var_dump($e) . "<br>"; // 输出两个变量 echo var_dump($a, $b) . "<br>"; ?> </body> </html>