PHP's very useful advanced functions PATH_SEPARATOR constant and set_include

PHP's very useful advanced functions PATH_SEPARATOR constant and set_include_path

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Release： 2016-08-08 09:29:13

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zendframework’s example index.php has this sentence set_include_path('.' . PATH_SEPARATOR . '../library/'. PATH_SEPARATOR . './application/models/'. PATH_SEPARATOR . './application/lib/'. In fact, it is a constantYou can know its value by directly echoing it. On Linux, it is a ":" sign, and on WIN, it is a ";" sign. Set_include_path is to set the include file path of php, which is quite the environment of the operating system. Variables// Works as of PHP 4.3.0

set_include_path('/inc'); // Works in all PHP versionsini_set('include_path', '/inc');?> Regarding the issue of set_include_path, under win, when you want to include multiple paths, you have to separate them with ";", but under Linux, use ";": "Separated. So the zf code above is a perfect match. get_include_path gets the currently existing environment variable Definition and usage pathinfo() function returns the file path information in the form of an array.
Syntax

pathinfo(path,options)

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Parameters

DescriptionOptional. Specifies the array elements to be returned. The default is all. Possible values: pathinfo() Returns an associative array containing path Information.

path	Required. Specifies the path to be checked.
process_sections
	PATHINFO_DIRNAME - only returns dirname PATHINFO_BASENAME - only returns basename PATHINFO_EXTENSION - only returns extension Description

path

Required. Specifies the path to be checked.

process_sections

PATHINFO_DIRNAME - only returns dirname

PATHINFO_BASENAME - only returns basename

PATHINFO_EXTENSION - only returns extension

Description

Includes the following array elements:

[dirname]

[basename]

[extension]

Tips and Notes
Note: If it is not required to obtain all units, the pathinfo() function returns characters string.

Example

Example 1

<?php
print_r(pathinfo("/testweb/test.txt"));
?>

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Output:

Array
(
[dirname] => /testweb
[basename] => test.txt
[extension] => txt
)

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Example 2

<?php
print_r(pathinfo("/testweb/test.txt",PATHINFO_BASENAME));
?>

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Output:

test.txt

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DIRECTORY_SEPARATOR window below

Instructions Path separator

windows

or /

linux

The above has introduced PHP's very useful advanced functions PATH_SEPARATOR constant and set_include_path, including relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.