如何用php把多个二维数组合并成1个二维数组?

Question

array(3) {
[0] => array(10) {

[0] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[1] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[2] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[3] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[4] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[5] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[6] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[7] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[8] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[9] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"

}
[1] => array(1) {

[0] => string(49) "zUploadFiles/photo/201903/21/1553157380531632.jpg"

}
[2] => array(1) {

[0] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"

}
}

合并成一个类似下面的

[0] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[1] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[2] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[3] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[4] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[5] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[6] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[7] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[8] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[9] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[10] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[11] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[12] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"
[13] => string(49) "zUploadFiles/photo/201903/21/1553157380631250.jpg"

Answer 1

$arr = array(
            array('1','2','3'),
            array('4','5','6'),
            array('7','8','9')
        );
        $new_arr = array();
        foreach ($arr as $item){
            $new_arr = array_merge($new_arr,$item);
        }
        var_dump($new_arr);

Answer 2

 $arr = array_merge(...$arr);

Answer 3

难道array_merge不行?

Answer 4

手机码字 未测试。

$res = array_reduce($arr,function($prev,$item){
    return array_merge($prev,$item);
},[]);

Answer 5

最笨的方法就是foreach 遍历追加到数组,
最好的方法是使用php 自带的C函数 array_merge

Answer 6

array_merge试一下