php - 是否可以在 PHP 字符串中扩展函数调用？

Question

我试着在这样的字符串中调用 foo():

echo "This is a ${foo()} car";

function foo() {
    return "blue";
}

但是，它以语法错误结束。

我找到了 here类似的东西，但不完全是我需要的:

echo "This is the value of the var named by the return value of getName(): {${getName()}}";

这有可能吗？

Answer 1

这可能吗？没有。

Functions, method calls, static class variables, and class constants inside {$} work since PHP 5. However, the value accessed will be interpreted as the name of a variable in the scope in which the string is defined. Using single curly braces ({}) will not work for accessing the return values of functions or methods or the values of class constants or static class variables.

这是关于 http://www.php.net/manual/en/language.types.string.php#language.types.string.parsing.complex 的 curl 语法的第一个注释.