Example analysis of get_defined_constants function usage in PHP _php tutorial

An example analysis of get_defined_constants function usage in PHP

This example describes the use of get_defined_constants functions in PHP. Share to everyone for your reference. The specific analysis is as follows:

Get_defined_constants (php 4 > = 4.1.0, php 5)

Get_defined_constants-Returns an associative array of names of all constants and their values

Describe

Array Get_defined_constants ([Boolean $ collation])

Returns all currently defined constants for the name and value. This includes the established extension and the Define () function that was created.

Parameters

Classification

This function returns the second aspect of the first and the constants and their values in the multidimensional array category.

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Define ("My_constant", 1); Print_r (Get_defined_constants (true)); ?> The above example would output something similar to: Array ( [internal] = = Array ( [E_error] = 1 [E_warning] = 2 [E_parse] = 4 [E_notice] = 8 [E_core_error] = 16 [E_core_warning] = 32 [E_compile_error] = 64 [E_compile_warning] = 128 [E_user_error] = 256 [E_user_warning] = 512 [E_user_notice] = 1024 [E_all] = 2047 [TRUE] = 1 ) [Pcre] = = Array ( [Preg_pattern_order] = 1 [Preg_set_order] = 2 [Preg_offset_capture] = 256 [Preg_split_no_empty] = 1 [Preg_split_delim_capture] = 2 [Preg_split_offset_capture] = 4 [Preg_grep_invert] = 1 ) [User] = Array ( [My_constant] = 1 ) )

I hope this article is helpful to everyone's PHP programming.

http://www.bkjia.com/PHPjc/1000110.html www.bkjia.com true http://www.bkjia.com/PHPjc/1000110.html techarticle Example analysis of get_defined_constants function usage in PHP This article describes the use of get_defined_constants functions in PHP. Share to everyone for your reference. The specific analysis is as follows: Get_define ...

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