PHP - Manual: Exception

2024-11-26

Exception::__construct »

« 预定义异常

Exception

(PHP 5, PHP 7, PHP 8)

简介

Exception是所有用户级异常的基类。

类摘要

class Exception implements Throwable {

/* 属性 */

protected string $message = "";

private string $string = "";

protected int $code;

protected string $file = "";

protected int $line;

private array $trace = [];

private ?Throwable $previous = null;

/* 方法 */

public __construct(string $message = "", int $code = 0, ?Throwable $previous = null)

final public getMessage(): string

final public getPrevious(): ?Throwable

final public getCode(): int

final public getFile(): string

final public getLine(): int

final public getTrace(): array

final public getTraceAsString(): string

public __toString(): string

private __clone(): void

}

属性

message: 异常消息内容
code: 异常代码
file: 抛出异常的文件名
line: 抛出异常在该文件中的行号
previous: 之前抛出的异常
string: 字符串形式的堆栈跟踪
trace: 数组形式的堆栈跟踪

Exception::__construct — 异常构造函数
Exception::getMessage — 获取异常消息内容
Exception::getPrevious — 返回前一个 Throwable
Exception::getCode — 获取异常代码
Exception::getFile — 创建异常时的程序文件名称
Exception::getLine — 获取创建的异常所在文件中的行号
Exception::getTrace — 获取异常追踪信息
Exception::getTraceAsString — 获取字符串类型的异常追踪信息
Exception::__toString — 将异常对象转换为字符串
Exception::__clone — 异常克隆

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User Contributed Notes 3 notes

down

whysteepy at gmail dot com ¶

4 years ago


Lists of Throwable and Exception tree as of 7.2.0

    Error
      ArithmeticError
        DivisionByZeroError
      AssertionError
      ParseError
      TypeError
        ArgumentCountError
    Exception
      ClosedGeneratorException
      DOMException
      ErrorException
      IntlException
      LogicException
        BadFunctionCallException
          BadMethodCallException
        DomainException
        InvalidArgumentException
        LengthException
        OutOfRangeException
      PharException
      ReflectionException
      RuntimeException
        OutOfBoundsException
        OverflowException
        PDOException
        RangeException
        UnderflowException
        UnexpectedValueException
      SodiumException 

Find the script and output in the following links:
https://gist.github.com/mlocati/249f07b074a0de339d4d1ca980848e6a
https://3v4l.org/sDMsv

posted by someone here http://php.net/manual/en/class.throwable.php

down

cHao ¶

7 years ago


Note that an exception's properties are populated when the exception is *created*, not when it is thrown.  Throwing the exception does not seem to modify them.

Among other things, this means:

* The exception will blame the line that created it, not the line that threw it.

* Unlike in some other languages, rethrowing an exception doesn't muck up the trace.

* A thrown exception and an unthrown one look basically identical.  On my machine, the only visible difference is that a thrown exception has an `xdebug_message` property while an unthrown one doesn't.  Of course, if you don't have xdebug installed, you won't even get that.

down

shaman_master at list dot ru ¶

2 years ago


Note: this documentation not full, ReflectionObject::export($exception):
<?php
Object of class [  class Exception implements Throwable ] {
  - Properties [7] {
    Property [  protected $message ]
    Property [  private $string ]
    Property [  protected $code ]
    Property [  protected $file ]
    Property [  protected $line ]
    Property [  private $trace ]
    Property [  private $previous ]
  }
  - Methods [11] {
    Method [  final private method __clone ] {
    }

    Method [  public method __construct ] {

      - Parameters [3] {
        Parameter #0 [  $message ]
        Parameter #1 [  $code ]
        Parameter #2 [  $previous ]
      }
    }

    Method [  public method __wakeup ] {
    }

    Method [  final public method getMessage ] {
    }

    Method [  final public method getCode ] {
    }

    Method [  final public method getFile ] {
    }

    Method [  final public method getLine ] {
    }

    Method [  final public method getTrace ] {
    }

    Method [  final public method getPrevious ] {
    }

    Method [  final public method getTraceAsString ] {
    }

    Method [  public method __toString ] {
    }
  }
}
?>

Missed:

    Property [  private $string ]
    Property [  private $trace ]
    Property [  private $previous ]

    Method [  public method __wakeup ] {
    }

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官方地址：https://www.php.net/manual/en/class.exception.php

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Exception

简介

类摘要

属性

目录

User Contributed Notes 3 notes