php数组格式化（将数组转换为另一个数组）[复制]

Question

This question already has an answer here:

• How to Flatten a Multidimensional Array? 27 answers

I have an array in php like the following

Array
(
    [0] => Array
        (
            [0] => 0
            [1] => 4
        )

    [1] => Array
        (
            [0] => 5
            [1] => 0
        )

    [2] => Array
        (
            [0] => 0
            [1] => 8
        )

     [3] => Array
        (
            [0] => 10
            [1] => 27
        )

)

How can I convert it into the following format.

array(0,4,5,0,0,8,10,27);

</div>

Answer 1

check

foreach($mainarray as $s){
    foreach ($s as $v){
        $str .=$v.','; 
    }
}
echo $str;