PHP-数组值作为变量的变量输出

Question

$sheet['salary']['inside'] = 'the value';
$input = array(
    "name"=>"sheet[salary][inside]",
);
echo eval("$".$input['name'].';');
//echo $input['name'];

Answer 1

 $a = 'Original';
$my_array = array("a" => "Cat","b" => "Dog", "c" => "Horse");
extract($my_array);
echo "$a = $a; $b = $b; $c = $c"; //$a = Cat; $b = Dog; $c = Horse

$a = 'Original';
$my_array = array("a" => "Cat","b" => "Dog", "c" => "Horse");
extract($my_array, EXTR_PREFIX_SAME, 'dup');
echo "$a = $a; $b = $b; $c = $c; $dup_a = $dup_a;"; //$a = Original; $b = Dog; $c = Horse; $dup_a = Cat;

Answer 2

为啥一定要传给name变量名字符串呢?

Answer 3

$sheet['salary']['inside'] = 'the value';
$input = array(
"name"=>"sheet[salary][inside]",
);

preg_match_all('/[a-z]+/', $input['name'], $matchs);

$match = $matchs[0];
$value = ${$match[0]}[$match[1]][$match[2]];

var_dump($value);
die;

php-可变变量

参考php手册，没有太好的解决方案。