当我在字符串中有函数体时,如何动态创建匿名函数.
例如
$user = "John Doe";
$body = "echo 'Hello' . $user;";
$myFunct = function($user) {$body}; // How do I have function body here from string.
$myFunct($user);
任何帮助将非常感激.
PS我正在寻找替代create_function()功能,这在PHP的早期版本中是有的.就像在create_function()中我们可以将函数体作为字符串传递一样,我想在字符串变量中定义匿名函数的主体.
有人可以解释为什么在下面的代码中永远不会达到"a"的情况以及为什么它总是会执行0
switch ("a") {
case 0:
echo "0";
break;
case "a": // never reached because "a" is already matched with 0
echo "a";
break;
}
我想从下面给出的数据中提取值 - 屏幕名称,名称,ID,配置文件图片URL:
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