我正在尝试在 php 中继续一个未定义的偏移代码

Question

I have code in php. The values of variables are empty but I want to continue if the variable is empty or not.

$str_array = explode(",",ltrim($e4view, ", "));

if (isset($str_array[0][1][2])) {
    $f4irst = $str_array[0];
    $s4econd = $str_array[1];
    $t4hird = $str_array[2];

    echo $f4irst + $s4econd + $t4hird;

Answer 1

你想这样做吗？

if (empty($str_array[0]) && empty($str_array[1] …) {