标签：
读《PHP和MySQL Web开发》笔记合集：
http://my.oschina.net/bluefly/blog/478580
1、异常处理概念
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<?php
try {
throw new Exception("A terrible error has occurred", 42);
}
catch (Exception $e) {
echo "Exception ". $e->getCode(). ": ". $e->getMessage()."<br />".
" in ". $e->getFile(). " on line ". $e->getLine(). "<br />";
}
?>
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2、Exception类
Exception(PHP 5 >= 5.1.0) 简介Exception是所有异常的基类。 类摘要
Exception {
/* 属性 */
protectedstring
$message ;
protectedint
$code ;
protectedstring
$file ;
protectedint
$line ;
/* 方法 */
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 )
}
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
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<?php
class myException extends Exception
{
function __toString()
{
return "<table border=\"1\">
<tr>
<td><strong>Exception ".$this->getCode()."
</strong>: ".$this->getMessage()."<br />"."
in ".$this->getFile()." on line ".$this->getLine()."
</td>
</tr>
</table><br />";
}
}
try
{
throw new myException("A terrible error has occurred", 42);
}
catch (myException $m)
{
echo $m;
}
?>
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// open file for appending
try
{
if (!($fp =
@fopen("$DOCUMENT_ROOT/../orders/orders.txt", ‘ab‘)))
throw new fileOpenException();
if (!flock($fp, LOCK_EX))
throw new fileLockException();
if (!fwrite($fp, $outputstring, strlen($outputstring)))
throw new fileWriteException();
flock($fp, LOCK_UN);
fclose($fp);
echo "<p>Order written.</p>";
}
catch (fileOpenException $foe)
{
echo "<p><strong>Orders file could not be opened.
Please contact our webmaster for help.</strong></p>";
}
catch (Exception $e)
{
echo "<p><strong>Your order could not be processed at this time.
Please try again later.</strong></p>";
}
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if (!($fp =
@fopen("$DOCUMENT_ROOT/../orders/orders.txt", ‘ab‘)))
throw new fileOpenException();
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原文地址：http://my.oschina.net/bluefly/blog/522358
