Exception::__toString

(PHP 5, PHP 7, PHP 8)

Exception::__toString — 将异常对象转换为字符串

说明

public Exception::__toString(): string

返回转换为字符串（string）类型的异常。

参数

此函数没有参数。

返回值

返回转换为字符串（string）类型的异常。

示例

示例 #1 Exception::__toString()示例

<?php
try {
    throw new Exception("Some error message");
} catch(Exception $e) {
    echo $e;
}
?>

以上示例的输出类似于：

exception 'Exception' with message 'Some error message' in /home/bjori/tmp/ex.php:3
Stack trace:
#0 {main}

参见

Throwable::__toString() - 获取 Throwable 对象 string 形式的表达

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devnull ¶

3 months ago

The Exception __toString implementation will also include the string representation of previous exceptions chained to this exception, _before_ the string representation of the current exception.

For example:

<?php
class OuterException extends Exception {}
class MiddleException extends Exception {}
class InnerException extends Exception {}

$excA = new InnerException("inner exception", 0);
$excB = new MiddleException("middle exception", 0, $excA);
$excC = new OuterException("outer exception", 0, $excB);

echo "The exception is:\n$excC";
?>

will print the following:

The exception is:
InnerException: inner exception in test.php:6
Stack trace:
#0 {main}

Next MiddleException: middle exception in test.php:7
Stack trace:
#0 {main}

Next OuterException: outer exception in test.php:8
Stack trace:
#0 {main}