Common PHP System Constants Summary _php Tutorial

The following are some common PHP system constants:

__file__ Current PHP file name

__line__ the number of rows in the current PHP file

__FUNCTION__ the currently executing function

__class__ the class currently being executed

Php_version version of PHP

Php_os the current server's operating system

True with True

False with False

E_error to the nearest error point

E_warning to the nearest warning point.

E_parse syntax has a wrong place

E_notice There are exceptions in the PHP language

M__PI Pi

M__e Scientific constant E

M__LOG2E logarithm of base e of 2

m_log10e logarithm of base e of 10

Natural logarithm of M_LN2 2

Natural logarithm of M_ln10 10

The contents of the PHP system constants are introduced here, we hope to help.

http://www.bkjia.com/PHPjc/446022.html www.bkjia.com true http://www.bkjia.com/PHPjc/446022.html techarticle Some common PHP system constants are as follows: __file__ current PHP file name __line__ The number of rows currently in PHP __function__ the currently executing function __class__ the currently executing class P ...

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