error_reporting — Sets which PHP errors are reported

說明：

int error_reporting ([ int $level ] )

The error_reporting() function sets the error_reporting directive at runtime. PHP has many levels of errors, using this function sets that level for the duration (runtime) of your script. If the optional level is not set, error_reporting() will just return the current error reporting level.

參數：

The new error_reporting level. It takes on either a bitmask, or named constants. Using named constants is strongly encouraged to ensure compatibility for future versions. As error levels are added, the range of integers increases, so older integer-based error levels will not always behave as expected. The available error level constants and the actual meanings of these error levels are described in the predefined constants.

返回值：

Returns the old error_reporting level or the current level if no level parameter is given.

范例：

<?php

//?Turn?off?all?error?reporting
error_reporting(0);

//?Report?simple?running?errors
error_reporting(E_ERROR?|?E_WARNING?|?E_PARSE);

//?Reporting?E_NOTICE?can?be?good?too?(to?report?uninitialized
//?variables?or?catch?variable?name?misspellings?...)
error_reporting(E_ERROR?|?E_WARNING?|?E_PARSE?|?E_NOTICE);

//?Report?all?errors?except?E_NOTICE
//?This?is?the?default?value?set?in?php.ini
error_reporting(E_ALL?^?E_NOTICE);

//?Report?all?PHP?errors?(see?changelog)
error_reporting(E_ALL);

//?Report?all?PHP?errors
error_reporting(-1);

//?Same?as?error_reporting(E_ALL);
ini_set('error_reporting',?E_ALL);

?>

常見的返回錯誤：

Value Constant ? 1 E_ERROR 2 E_WARNING 4 E_PARSE 8 E_NOTICE 16 E_CORE_ERROR 32 E_CORE_WARNING 64 E_COMPILE_ERROR 128 E_COMPILE_WARNING 256 E_USER_ERROR 512 E_USER_WARNING 1024 E_USER_NOTICE 2048 E_STRICT 4096 E_RECOVERABLE_ERROR 8192 E_DEPRECATED 16384 E_USER_DEPRECATED

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