implode(‘,’,$arr)
//将数组转字符串
$arr = [
'a'=>1,
'b'=>2,
'c'=>3,
];
$arr_string = implode(',',$arr);
dump($arr_string);
//打印为 string(5) "1,2,3"
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implode(‘,’,$arr)
//将数组转字符串
$arr = [
'a'=>1,
'b'=>2,
'c'=>3,
];
$arr_string = implode(',',$arr);
dump($arr_string);
//打印为 string(5) "1,2,3"
