如何使用变量访问动态属性? [英] How to access dynamic property by using variable?

问题描述

请参阅:

$class_members = get_class_vars(__CLASS__);

foreach($class_members as $key => $value)
{
    if (strpos($key, '_output') === 0)
    {
        // I want to eval() this
        $code = '$this->' . $key . ' = 0;';
    }
}

假设我想将值0分配给所有以_output开头的类成员.我计划使用eval. 好主意还是坏主意?

Assume I want to assign the value 0 to all class members that begin with _output. I plan to use eval. Good or bad idea?

推荐答案

您不需要eval().您可以像$this->{$key}一样使用变量:

You don't need eval() for this. You can use a variable as in $this->{$key}:

foreach($class_members as $key => $value)
{
    if (strpos($key, '_output') === 0)
    {
        // Look mom, no eval()!
       $this->{$key} = 0;
    }
}

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