PHP中Error与Exception有什么区别,针对这个问题,这篇文章详细介绍了相对应的分析和解答,希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。
PHP 中 error 与 exception 的区别
PHP 7 的新特性
From now on, most of the errors are reported through the exception class Error.
即,PHP 7 开始,Error 与 Exception 都是继承自 Throwable。
从 Throwable 的继承关系,可以看到 Error 与 Exception 是平级的关系。
interface Throwable
|- Error implements Throwable
|- ArithmeticError extends Error
|- DivisionByZeroError extends ArithmeticError
|- AssertionError extends Error
|- ParseError extends Error
|- TypeError extends Error
|- ArgumentCountError extends TypeError
|- Exception implements Throwable
|- ClosedGeneratorException extends Exception
|- DOMException extends Exception
|- ErrorException extends Exception
|- IntlException extends Exception
|- LogicException extends Exception
|- BadFunctionCallException extends LogicException
|- BadMethodCallException extends BadFunctionCallException
|- DomainException extends LogicException
|- InvalidArgumentException extends LogicException
|- LengthException extends LogicException
|- OutOfRangeException extends LogicException
|- PharException extends Exception
|- ReflectionException extends Exception
|- RuntimeException extends Exception
|- OutOfBoundsException extends RuntimeException
|- OverflowException extends RuntimeException
|- PDOException extends RuntimeException
|- RangeException extends RuntimeException
|- UnderflowException extends RuntimeException
|- UnexpectedValueException extends RuntimeException
捕获 Trying to get property of non-object 的方法
try {
// Code that may throw an Exception or Error.
} catch (\Throwable $t) {
// Handle exception
}
同时兼容 PHP 5 和 PHP 7 的写法
try {
// Code that may throw an Exception or Error.
} catch (\Throwable $t) {
// Executed only in PHP 7, will not match in PHP 5.x
} catch (\Exception $e) {
// Executed only in PHP 5.x, will not be reached in PHP 7
}
一些内置方法
interface Throwable
{
public function getMessage(): string; // Error reason
public function getCode(): int; // Error code
public function getFile(): string; // Error begin file
public function getLine(): int; // Error begin line
public function getTrace(): array; // Return stack trace as array like debug_backtrace()
public function getTraceAsString(): string; // Return stack trace as string
public function getPrevious(): Throwable; // Return previous `Trowable`
public function __toString(): string; // Convert into string
}
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