php异常和错误处理
php错误和异常处理
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PHP为异常处理提供了内置类――Exception。其构造函数需要两个参数
除了构造函数外,改类还提供了如下所示的内置方法:
##getCode()――返回传递给构造函数的代码
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##getMessage()――返回传递给构造函数的消息
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##getFile()――返回产生异常的代码文件的完整路径
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##getLine()――返回代码文件中产生异常的代码行号
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##getTraceAsString()――返回与getTrace()方向相同的信息,该信息将被格式化成一个字符串
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##_toString()――允许简单的现实一个Exception对象,并且给出以上所有方法可以提供的信息

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