$a ＆＆ $b = $c what???

$a && $b = $c;

$a = 1;
$b = 2;
$c = 3;
$a && $b = $c;
echo "a:$a";
echo "b:$b";
echo "c:$c";

// This is a
a:1
b:3
c:3

$a = 0;
$b = 2;
$c = 3;
$a && $b = $c;
echo "a:$a";
echo "b:$b";
echo "c:$c";

// This is a
a:0
b:2
c:3

analysis ：

1. && And assignment operators “=” The priority of is && High priority , But the reddened writing is not $a and $b First do the sum operation, and then =$c, This understanding is equivalent to 1=$c, and 1=$c It's wrong to write like this
2. The correct understanding of this alternative way of writing is ：
   if($a){$b = $c}, That is, if $a It's true , Then execute the assignment statement $b = $c; Otherwise, the assignment statement will not be executed , The result is not hard to understand