Exception是所有异常的基类，类摘要如下：

<?php

class Exception {

	protected string $message;  // 异常消息内容

	protected int $code;  // 异常代码

	protected string $file;  // 抛出异常的文件名

	protected int $line;  // 抛出异常在该文件的行号

	public __construct([string $message = "" [, int $code = 0 [, Exception $previous = NULL]]])

	final public string getMessage(void)

	final public Exception 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)

}

ErrorException是错误异常，类摘要如下：

<?php

class ErrorException extends Exception {

	protected int $severity;  // 异常级别

	public __construct([string $message = "" [, int $code = 0 [, int $severity = 1 [, string $filename = __FILE__ [, int $lineno = __LINE__ [, Exception $previous = NULL]]]]]])

	final public int getSeverity(void)

}

（全文完）