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使用set_error_handler()不能捕獲FATAL級別錯誤

2019-11-19 01:52:19

標籤: PHP, set_error_handler, Fatal Errors, register_shutdown_function, error_get_last,

在PHP中使用set_error_handler()實現自定義錯誤處理函數是一種非常有用的技術。然而,set_error_handler()卻不能捕獲致命錯誤。

PHP文檔這麼描述,以下錯誤不可以被用戶定義的函數處理。
E_ERROR
E_PARSE
E_CORE_ERROR
E_CORE_WARNING
E_COMPILE_ERROR
E_COMPILE_WARNING
E_STRICT
但通過結合使用register_shutdown_function()和error_get_last()來捕獲致命的E_ERROR錯誤,並將其定向到自定義錯誤處理程序。以下的代碼展示了這種技術。
set_error_handler('exception_handler');

register_shutdown_function('shutdown_handler');

function exception_handler($err_no, $err_str, $err_file, $err_line)
{
    error_reporting(0);

    // save error log
    // ...

    error_reporting(E_ALL);
}

function shutdown_handler()
{
    $error = error_get_last();
    if (empty($error)) {
        return;
    }
    error_reporting(0);

    // save error log
    // ...

    error_reporting(E_ALL);
}

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