PHP 8.4.0 RC4 available for testing

    Exception::__toString

    (PHP 5, PHP 7, PHP 8)

    Exception::__toString — 例外の文字列表現

    説明

    public Exception::__toString(): string

    例外を文字列で表現したものを返します。

    パラメータ

    この関数にはパラメータはありません。

    戻り値

    例外を文字列で表現したものを返します。

    例

    例1 Exception::__toString() の例

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

    上の例の出力は、 たとえば以下のようになります。

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

    参考

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    User Contributed Notes 1 note

    up
    1
    devnull
    4 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}
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