$a = 2;
$a == 1 ? $test="企业" : ($a==2 ? $test="地区" : $test="其他地方");
echo $test;
先判断$a是否为1 如果是 直接输出 企业,如果不是 继续判断 相当于else里面又嵌套一个if 如果等于2输出地区 如果不是输出 其他地方
等价于
$a = 2;
if($a == 1) {
echo $test="企业";
} else {
if($a == 2){
$test = "地区";
} else {
$test="其他地方";
}
}
echo $test;
或者
if($a == 1) {
echo $test="企业";
} else {
$a==2 ? $test="地区" : $test="其他地方";
}

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