$a && $b = $c; 这是啥意思啊?麻烦说的详细些.基础的知识就不用说了.我PHP也做了几年.刚才没有说清楚.$a = 1;$b = 2;$c = 3;$a && $b = $c;echo "a:$a";echo "b:$b";echo "c:$c";这样是a:1b:3c:3$a = 0;$b = 2;$c = 3;$a && $b = $c;echo "a:$a";echo "b:$b";echo "c:$c";这样是a:0b:2c:3这是怎么个情况?

$a && $b = $c; 这是啥意思啊?麻烦说的详细些.
基础的知识就不用说了.我PHP也做了几年.
刚才没有说清楚.
$a = 1;
$b = 2;
$c = 3;
$a && $b = $c;
echo "a:$a
";
echo "b:$b
";
echo "c:$c
";
这样是
a:1
b:3
c:3
$a = 0;
$b = 2;
$c = 3;
$a && $b = $c;
echo "a:$a
";
echo "b:$b
";
echo "c:$c
";
这样是
a:0
b:2
c:3
这是怎么个情况?