php - PHP怎么实现输出数组变量？

Question

        $html['result'] = '1111111111';                $arr = [            'urls'=>"html['result']"        ];        $temp = $arr['urls'];

代码不变，怎么能过$arr输出“1111111111”

Answer 1

Answer 2

用 eval 吧

<?php$html['result'] = '1111111111';$arr = [    'urls' => "html['result']"];$temp = $arr['urls'];var_dump(eval("return \$$temp;")); // 1111111111

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复杂一点儿，还可以用 正则 + 可变变量

<?php$html['result'] = '1111111111';$arr = [    'urls' => "html['result']"];$temp = $arr['urls'];preg_match('!(?<variable>\w+)\[(\'?)(?<dim>.+?)\\2]!',$temp,$row);$vb = $row['variable'];$result = $$vb[$row['dim']];var_dump($result);

Answer 3

这样?

        $html['result'] = '1111111111';         var_dump($html['result']);        $arr = [            'urls'=>"html['result']"        ];        $temp = $arr['urls'];