这种符号各表示啥意思
<?php<br />
$mysqli=new mysqli("localhost","root","","xsphpdb");<br />
<br />
$stmt=$mysqli->stmt_init();<br />
<br />
var_dump($stmt);<br />
<br />
$mysqli->close();<br />
结果是:
object(mysqli_stmt)
#2 (0) { }
其中的#2是啥意思 0又是啥意思,还有后面的花括号
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