PHP5中的异常处理详解(1)
Jun 13, 2016 am 11:02 AM
catchfilepathphpphp5trydeal withabnormalDetectionDetailed explanation
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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