php ?: ??
2019-02-13 本文已影响0人
段义纬
$x=0;
echo $x??4;//0
echo "<br/>";
echo isset($x)?$x:4;//0
echo "<br/>";
echo $x?:4;//4
echo "<br/>";
echo !empty($x)?$x:4;//4
die;
$x=0;
echo $x??4;//0
echo "<br/>";
echo isset($x)?$x:4;//0
echo "<br/>";
echo $x?:4;//4
echo "<br/>";
echo !empty($x)?$x:4;//4
die;