Detailed explanation of exception handling in PHP5 (1)_PHP tutorial

首先是try,catch

﹤?php <br>$path = "D:\\in.txt"; <br>try //检测异常 <br>{ <br>file_open($path); <br>} <br>catch(Exception $e) //捕获异常 <br>{ <br>echo $e-﹥getMessage(); <br>} 

function file_open($path) <br>{ <br>if(!file_exists($path)) //如果文件无法找到，抛出异常对象 <br>{ <br>throw new Exception("文件无法找到", 1); <br>} 

if(!fopen($path, "r")) //如果文件无法打开，抛出异常对象 <br>{ <br>throw new Exception("文件无法打开", 2); <br>} <br>} <br>?﹥ 

注意用$e->getMessage()输出异常信息.

输出异常完整信息

﹤?php <br>$path = "D:\\in.txt"; 

try <br>{ <br>file_open($path); //尝试打开文件 <br>} <br>catch(Exception $e) <br>{ <br>echo "异常信息：".$e-﹥getMessage()."\n"; //返回用户自定义的异常信息 <br>echo "异常代码：".$e-﹥getCode()."\n"; //返回用户自定义的异常代码 <br>echo "文件名：".$e-﹥getFile()."\n"; //返回发生异常的PHP程序文件名 <br>echo "异常代码所在行".$e-﹥getLine()."\n"; //返回发生异常的代码所在行的行号 <br>echo "传递路线："; <br>print_r($e-﹥getTrace()); //以数组形式返回跟踪异常每一步传递的路线 <br>echo $e-﹥getTraceAsString(); //返回格式化成字符串的getTrace函数信息 <br>} 

function file_open($path) <br>{ <br>if(!file_exists($path)) //如果文件不存在，则抛出错误 <br>{ <br>throw new Exception("文件无法找到", 1); <br>} 

if(!fopen($path, "r")) <br>{ <br>throw new Exception("文件无法打开", 2); <br>} <br>} <br>?﹥  

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http://www.bkjia.com/PHPjc/446658.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/446658.htmlTechArticle首先是try,catch ﹤?php $path = "D:\\in.txt"; try //检测异常 { file_open($path); } catch(Exception $e) //捕获异常 { echo $e-﹥getMessage(); } function file_open($path)...