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

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User Contributed Notes 1 note

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devnull
9 days 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}
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