[英]Configuration class - Get configuration array from the function string argument
I have a function like this: 我有一个这样的功能:
$conf = array ('test_value' => 1, 'test_value2' => 2);
function GetValueArray($array, $value)
{
return $array[$value];
}
Im using this function to receive a value from an array. 我正在使用此函数从数组接收值。 My problem is that i cannot use this function like this: 我的问题是我不能使用这样的功能:
GetValueArray('conf', 'test_value');
How could i convert 'conf' to the real array named conf to receive my 'test_value'? 我如何将“ conf”转换为名为conf的真实数组以接收“ test_value”?
Because functions have their own scope, be sure to 'globalize' the variable that you're looking into. 由于函数有其自身的作用域,因此请确保“全局化”要查找的变量。
But as Rizier123 said, you can use brackets around a variable to dynamically get/set variables. 但是正如Rizier123所说,您可以在变量周围使用方括号来动态获取/设置变量。
<?php
$conf = array ('test_value' => 1, 'test_value2' => 2);
function GetValueArray($array, $value)
{
global ${$array};
return ${$array}[$value];
}
echo GetValueArray('conf', 'test_value'); // echos '1'
echo GetValueArray('conf', 'test_value2'); // echos '2'
?>
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