数组转字符串
$a = [1,2,3];
$string = implode(",",$a);
//输出结果为:“1,2,3”
$b = "1,2";
$array = explode(',',$b);
//输出结果为:array (size=2)
// 0 => string '1' (length=2)
// 1 => string '2' (length=1)
数组转字符串
$a = [1,2,3];
$string = implode(",",$a);
//输出结果为:“1,2,3”
$b = "1,2";
$array = explode(',',$b);
//输出结果为:array (size=2)
// 0 => string '1' (length=2)
// 1 => string '2' (length=1)