php[tek] 2018 : Call for Speakers

Exception

(PHP 5 >= 5.1.0, PHP 7)

简介

Exception是所有异常的基类。

类摘要

Exception {
/* 属性 */
protected string $message ;
protected int $code ;
protected string $file ;
protected int $line ;
/* 方法 */
public __construct ([ string $message = "" [, int $code = 0 [, Throwable $previous = NULL ]]] )
final public string getMessage ( void )
final public Throwable getPrevious ( void )
final public int getCode ( void )
final public string getFile ( void )
final public int getLine ( void )
final public array getTrace ( void )
final public string getTraceAsString ( void )
public string __toString ( void )
final private void __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

Table of Contents

add a note add a note

User Contributed Notes 3 notes

up
34
cHao
3 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.
up
-1
maxalmonte14 at hotmail dot com
19 days ago
The reason because Exception class does not implement the Throwable interface is Exception exists since PHP5, while Throwable was defined in PHP7! So, Throwable interface is only for core use purpose, you cannot implement it in your own classes, if you want to make your classes "throwable" you have to extend Exception class.
up
-19
fazlidddin dot uzbek at yahoo dot com
2 months ago
Must be
Exception implements Throwable
{
...
}

instead of

Exception
{

}
To Top