set_error_handler包含錯誤的多個回聲

Question

爲什麼包含錯誤回顯四次？

系統嘗試4次「打開流」嗎？

我所做的：

function errorHandler($errno, $errstr, $errfile, $errline) { 
    if ($errno == E_NOTICE) { 
     echo "<br/>".$errno."== E_NOTICE<br/>"; 
    } 
    if ($errno == E_USER_NOTICE) { 
     echo "<br/>".$errno."== E_USER_NOTICE<br/>"; 
    } 
    if ($errno == E_DEPRECATED) { 
     echo "<br/>".$errno."== E_DEPRECATED<br/>"; 
    } 
    if ($errno == E_USER_DEPRECATED) { 
     echo "<br/>".$errno."== E_USER_DEPRECATED<br/>"; 
    } 
    if ($errno == E_STRICT) { 
     echo "<br/>".$errno."== E_STRICT<br/>"; 
    } 
    if ($errno == E_WARNING) { 
     echo "<br/>".$errno."== E_WARNING<br/>"; 
    } 
    if ($errno == E_USER_WARNING) { 
     echo "<br/>".$errno."== E_USER_WARNING<br/>"; 
    } 
    if ($errno == E_ERROR) { 
     echo "<br/>".$errno."== E_ERROR<br/>"; 
    } 
    if ($errno == E_USER_ERROR) { 
     echo "<br/>".$errno."== E_USER_ERROR<br/>"; 
    } 
} 
set_error_handler("errorHandler"); 

結果：

2== E_WARNING 

2== E_WARNING 

2== E_WARNING 

2== E_WARNING 

Answer 1

沒有看到有關的其他信息到你的錯誤很難說。

Files are included based on the file path given or, if none is given, the include_path specified. If the file isn't found in the include_path, include will finally check in the calling script's own directory and the current working directory before failing. The include construct will emit a warning if it cannot find a file; this is different behavior from require, which will emit a fatal error.

Docmumentation for include()。

PHP considers each entry in the include path separately when looking for files to include. It will check the first path, and if it doesn't find it, check the next path, until it either locates the included file or returns with a warning or an error. You may modify or set your include path at runtime using set_include_path().

根據包含過程的PHP docs。

在附註中，我對您提供的自定義功能errorHandler()進行了一些修改。

<?php 
function errorHandler($errno, $errstr, $errfile, $errline) { 
    $response; 

    switch ($errno){ 
     case E_NOTICE: 
      $reponse = 'E_NOTICE'; 
      break; 

     case E_USER_NOTICE: 
      $reponse = 'E_USER_NOTICE'; 
      break; 

     case E_DEPRECATED: 
      $reponse = 'E_DEPRECATED'; 
      break; 

     case E_USER_DEPRECATED: 
      $reponse = 'E_USER_DEPRECATED'; 
      break; 

     case E_STRICT: 
      $reponse = 'E_STRICT'; 
      break; 

     case E_WARNING: 
      $reponse = 'E_WARNING'; 
      break; 

     case E_USER_WARNING: 
      $reponse = 'E_USER_WARNING'; 
      break; 

     case E_ERROR: 
      $reponse = 'E_ERROR'; 
      break; 

     case E_USER_ERROR: 
      $reponse = 'E_USER_ERROR'; 
      break; 
    } 
    echo "<br />Errno: [$errno]; Type: [$reponse]<br />"; 
    echo "<br />Error on line [$errline] in file [$errfile]<br />"; 
    echo "<br />Error: ". $errstr . "<br />"; 
} 

set_error_handler("errorHandler"); 

?>