Question

重新生成问题的步骤：

共有3个文件

include.php包含：

<?php
    $var1 = 5 + $var1;
?>

require.php包含：

<?php
    $var2 = 5 + $var2;
?>

incvsreq.php将包含：

<?php
$var1 = 0; // Starting with 0

include('include.php'); // Includes the file so Adding 5 + 0

echo $var1.'<br/>'; // Result 5

include_once('include.php'); // Will not include as it is already included

echo $var1.'<br/>'; // Display again 5, as it was not included above

include('include.php'); // This will include again so 5 + 5

echo $var1; // Result 10

rename('include.php', '_include.php'); // Rename the file

include('include.php'); // Warning should occur on this line as the file is not present now, but the script should continue.

$var2 = 0; // Starting with 0

require('require.php'); // Includes the file so Adding 5 + 0

echo $var2.'<br/>'; // Result 5

require_once('require.php'); // Will not include as it is already included

echo $var2.'<br/>'; // Display again 5, as it was not included above

require('require.php'); // This will include again so 5 + 5

echo $var2; // Result 10

rename('require.php', '_require.php'); // Rename the file

require('require.php'); // ERROR should occur on this line as the file is not present now, and the script should not continue.

echo 'This is not displayed'; // This won't be displayed.
?>

此脚本的输出为：

5
5
10
Warning: include(include.php) [function.include]: failed to open stream: No such file or directory in C:\Program Files\Ampps\www\include\incvsreq.php on line 23

Warning: include(include.php) [function.include]: failed to open stream: No such file or directory in C:\Program Files\Ampps\www\include\incvsreq.php on line 23

Warning: include() [function.include]: Failed opening 'include.php' for inclusion (include_path='.;C:\php\pear') in C:\Program Files\Ampps\www\include\incvsreq.php on line 23
5
5
10
Warning: require(require.php) [function.require]: failed to open stream: No such file or directory in C:\Program Files\Ampps\www\include\incvsreq.php on line 45

Warning: require(require.php) [function.require]: failed to open stream: No such file or directory in C:\Program Files\Ampps\www\include\incvsreq.php on line 45

Fatal error: require() [function.require]: Failed opening required 'require.php' (include_path='.;C:\php\pear') in C:\Program Files\Ampps\www\include\incvsreq.php on line 45

我从顶部听到了上一次和第三次警告中的致命错误但是其他警告是如何出现的？我在这里有点困惑。为了更好地理解，我对每一行进行了评论。

Answer 1

understood the Fatal Error in the last and 3rd warning from the top but how did other warnings appear ? I am little confused here.

如果您详细查看错误日志。正如您所期望的那样，只在两行上生成错误消息。第23行和第45行。即使它们显示3次，它们也仅在您要求的那两行上生成。此代码似乎表现得应该

Answer 2

错误行在几个不同级别的报告和生成MSG 打印出来的内容由PHP中设置的error_reporting级别控制有关更多信息，请查看PHP文档... error_reporting

PHP：需要/包含不必要的警告

2 个答案: