对于基本类型，只需使用(string)$var或直接打印此变量。PHP是动态类型的语言，变量会动态地转换为字符串。

如果你想将对象转换为字符串，你需要定义返回字符串的__toString()方法。禁止此方法抛出异常。

This can be difficult in PHP because of the way data types are handled internally. Assuming that you don't mean complex types such as objects or resources, generic casting to strings may still result in incorrect conversion. In some cases pack/unpack may even be required, and then you still have the possibility of problems with string encoding. I know this might sound like a stretch but these are the type of cases where standard type juggling such as $myText = $my_var .''; and $myText = (string)$my_var; (and similar) may not work. Otherwise I would suggest a generic cast, or using serialize() or json_encode(), but again it depends on what you plan on doing with the string.

主要的区别在于，Java和. net在处理二进制数据和基本类型以及从特定类型转换到/从特定类型转换到字符串方面有更好的功能，即使对用户抽象了特定的情况也是如此。PHP的情况则完全不同，即使是处理十六进制也会让你摸不着头脑，直到你掌握了它。

我想不出更好的方法来回答这个问题，这是可比Java/。NET中的_toString()和此类方法通常以特定于对象或数据类型的方式实现。在这种情况下，神奇的方法__toString()和__serialize()/__unserialize()可能是最好的比较。

还要记住，PHP没有基本数据类型的相同概念。从本质上讲，PHP中的每一种数据类型都可以被认为是一个对象，它们的内部处理程序试图使它们具有某种通用性，即使这意味着在将float转换为int时失去准确性。你不能像在Java中那样处理类型，除非你在本地扩展中使用它们的zvals。

While PHP userspace doesn't define int, char, bool, or float as an objects, everything is stored in a zval structure which is as close to an object that you can find in C, with generic functions for handling the data within the zval. Every possible way to access data within PHP goes down to the zval structure and the way the zend vm allows you to handles them without converting them to native types and structures. With Java types you have finer grained access to their data and more ways to to manipulate them, but also greater complexity, hence the strong type vs weak type argument.

这些链接可能会有帮助:

https://www.php.net/manual/en/language.types.type-juggling.php https://www.php.net/manual/en/language.oop5.magic.php

把它放在双引号里应该可以:

$myText = "$myVar";

__toString方法或(string)强制转换

$string=(string)$variable;  //force make string 

可以将对象视为字符串

class Foo
{

  public function __toString()
  {
     return "foo";
  }

}

echo new Foo(); //foo

还有另一个技巧，假设你有int变量，你想把它变成字符串

$string=''.$intvariable;

我如何转换一个PHP的值 变量转换为字符串?

可以使用(string)强制转换或strval()函数将值转换为字符串。(编辑:托马斯也说过)。

当您将它作为字符串使用时，它也应该自动为您强制转换。

您总是可以创建一个名为.ToString($in)的方法来返回

$in . '';