PHP ArithmeticError错误处理是指在PHP程序中,当发生算术运算错误时,如何处理这些错误。当执行数学运算时,如果发生错误,会抛出 ArithmeticError。这些错误包括尝试对负数进行位移操作,以及对任何可能导致值超出 int 范围的 intdiv() 调用。
一、类摘要
class ArithmeticError extends Error {
protected string $message = "";
private string $string = "";
protected string $file = "";
private array $trace = [];
private ?Throwable $previous = null;
public Error::__construct(string $message = "", int $code = 0, ?Throwable $previous = null)
final public Error::getMessage(): string
final public Error::getPrevious(): ?Throwable
final public Error::getCode(): int
final public Error::getFile(): string
final public Error::getLine(): int
final public Error::getTrace(): array
final public Error::getTraceAsString(): string
public Error::__toString(): string
private Error::__clone(): void
class ArithmeticError extends Error {
/* 继承的属性 */
protected string $message = "";
private string $string = "";
protected int $code;
protected string $file = "";
protected int $line;
private array $trace = [];
private ?Throwable $previous = null;
/* 继承的方法 */
public Error::__construct(string $message = "", int $code = 0, ?Throwable $previous = null)
final public Error::getMessage(): string
final public Error::getPrevious(): ?Throwable
final public Error::getCode(): int
final public Error::getFile(): string
final public Error::getLine(): int
final public Error::getTrace(): array
final public Error::getTraceAsString(): string
public Error::__toString(): string
private Error::__clone(): void
}
class ArithmeticError extends Error {
/* 继承的属性 */
protected string $message = "";
private string $string = "";
protected int $code;
protected string $file = "";
protected int $line;
private array $trace = [];
private ?Throwable $previous = null;
/* 继承的方法 */
public Error::__construct(string $message = "", int $code = 0, ?Throwable $previous = null)
final public Error::getMessage(): string
final public Error::getPrevious(): ?Throwable
final public Error::getCode(): int
final public Error::getFile(): string
final public Error::getLine(): int
final public Error::getTrace(): array
final public Error::getTraceAsString(): string
public Error::__toString(): string
private Error::__clone(): void
}
二、示例
在下面的示例中,尝试将二进制移位运算符与负操作数一起使用:
<?<a href="https://www.zzbaike.com/tag/php" title="查看所有文章关于 php" target="_blank">php</a>
catch (ArithmeticError $e) {
<?<a href="https://www.zzbaike.com/tag/php" title="查看所有文章关于 php" target="_blank">php</a>
try {
$a = 10;
$b = -3;
$result = $a << $b;
}
catch (ArithmeticError $e) {
echo $e->getMessage();
}
?>
<?php
try {
$a = 10;
$b = -3;
$result = $a << $b;
}
catch (ArithmeticError $e) {
echo $e->getMessage();
}
?>
输出:
Bit shift by negative number
如果对 intdiv()函数的调用导致无效的整数,则会引发ArithmeticError。如下例所示,PHP(PHP_INT_MIN)中允许的最小整数不能除以-1。
三、try-catch语句
还可以使用try-catch语句来捕获和处理ArithmeticError异常:
$result = 10 / 0; // 除数为0,将引发ArithmeticError异常
} catch (ArithmeticError $e) {
echo "发生了算术运算错误: " . $e->getMessage();
<?php
try {
// 可能引发异常的代码
$result = 10 / 0; // 除数为0,将引发ArithmeticError异常
} catch (ArithmeticError $e) {
// 处理捕获到的异常
echo "发生了算术运算错误: " . $e->getMessage();
}
?>
<?php
try {
// 可能引发异常的代码
$result = 10 / 0; // 除数为0,将引发ArithmeticError异常
} catch (ArithmeticError $e) {
// 处理捕获到的异常
echo "发生了算术运算错误: " . $e->getMessage();
}
?>
解释:
- 使用try关键字开始一个异常处理块;
- 在try块中执行可能引发异常的代码;
- 使用catch关键字捕获特定的异常类型(例如ArithmeticError);
- 在catch块中处理捕获到的异常。