php錯誤顯示

爲啥要整理下php的報錯機制？

一門語言懂了報錯機制，就能夠處理複雜的異常或錯誤代碼了。提升功力

 

設置php錯誤顯示等級

ini_set('display_errors', 1);
#

 

 

實力調試出錯誤

Warning 

警告

Warning: Invalid argument supplied for foreach() in /data/www/sf-plearnu-local/web/3.php on line 9

ini_set('display_errors', 1);

foreach(1 as $v); 程序編譯後。執行出錯，報警告錯誤

 

Parse

解析

 

Parse error: syntax error, unexpected end of file in /data/www/sf-plearnu-local/web/3.php on line 10

ini_set('display_errors', 1);

foreach(1 as $v)

// 少了標點符號，在解析代碼的時候就錯誤了

 

Notice

通知

 

Notice: Undefined variable: ads in /data/www/sf-plearnu-local/web/3.php on line 9

ini_set('display_errors', 1);

echo $ads;

// 變量未定義，通知錯誤

 

Fatal

致命

 

它話

include 包含的文件不存在的時候，程序報警告錯誤。代碼繼續執行

require 包含的文件不存在的時候，程序報致命錯誤，代碼不向下執行

require('321.php');
echo '---';

Warning: require(321.php): failed to open stream: No such file or directory in /data/www/sf-plearnu-local/web/1.php on line 10

Fatal error: require(): Failed opening required '321.php' (include_path='.:/usr/share/pear:/usr/share/php') in /data/www/sf-plearnu-local/web/1.php on line 10

include('321.php');
echo '---';

Warning: include(321.php): failed to open stream: No such file or directory in /data/www/sf-plearnu-local/web/1.php on line 10

Warning: include(): Failed opening '321.php' for inclusion (include_path='.:/usr/share/pear:/usr/share/php') in /data/www/sf-plearnu-local/web/1.php on line 10
---