php 异常后

<?php
class CustomException extends Exception {
    public function __construct($message, $code = 0, Exception $previous = null) {
        parent::__construct($message, $code, $previous);
    }
}

function divide($numerator, $denominator) {
    if ($denominator == 0) {
        throw new CustomException("Division by zero");
    }
    return $numerator / $denominator;
}

try {
    echo divide(10, 0);
} catch (CustomException $e) {
    echo "Caught exception: " . $e->getMessage();
}
?>

try {
    // 可能抛出异常的代码
} catch (Exception $e) {
    // 处理异常
}

function handleException(Exception $e) {
    // 处理异常的逻辑
}

try {
    // 可能抛出异常的代码
} catch (Exception $e) {
    handleException($e);
}

$resource = fopen('file.txt', 'r');

try {
    // 使用资源的代码
} catch (Exception $e) {
    // 处理异常
} finally {
    fclose($resource);
}