如何在php中把空数组过滤，然后讲数组转化为字符串？

Answer 1

array_filter($arr),将数组中的空值去除；implode('分隔符或者连接符',$arr),将数组按照分隔符或者连接符转换成字符串

Answer 2

循环遍历用 foreach   判断语句 if ($v!=""){$data[$k]=$v;}  遍历出来的$data  转化字符串就好了。implode(",", $data  )  转变回来 explode()

Answer 3

判断数组是否为空<?php     $arr = array();     echo count($arr);     echo size($arr);     var_dump(empty($arr));声明一个空数组，将不为空的数组加入到这个新的数组，然后将数组转成json字符串即可json_encode()就是将PHP数组转换成Json。相反，json_decode()就是将Json转换成PHP数组具体你可以学习一下json

Answer 4

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Answer 5

用array_filter()过滤，implode()转换