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$a = 1;
$b = 2;
$c = &$a;
$c = 2;
if(($a = 3) > 0 || ($b = $a) > 0){
$a++;
$b++;
$c++;
}
printf("%d,%d,%x\n",$a,$b,$c);
if(($c = 3) > 0 || ($b = $a) > 0 ){
$a++;
$b++;
}
printf("%d,%d,%x\n",$a,$b,$c);
function test(&$a)
{
$a=$a+100;
}
$b=1;
echo $b;//输出1
test($b);
echo "<hr>";
echo $b;
if($a = 3 || $b = $a){
$a = 1;
$b = 2;
$c = &$a; //变量c地址指向变量a
$c = 2; //这个其实没什么用
if(($a = 3) > 0 || ($b = $a) > 0){ //条件判断中前者成立,后者不执行
//$a = 3, $b = 2, $c = 3
$a++; //$a = $c = 4(变量c地址指向了a)
$b++; //$b = 3
$c++; //$c = $a
}
printf("%d,%d,%x\n",$a,$b,$c); //结果5,3,5
//$a = 5, $b = 3, $c = 5
if(($c = 3) > 0 || ($b = $a) > 0 ){//条件判断中前者成立,后者不执行
$a++; //$a = $c + 1
$b++; //$b = 4
}
//$c = $a = 4
printf("%d,%d,%x\n",$a,$b,$c); //结果4,4,4