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This article introduces the knowledge of "how to define constants in define in PHP". Many people will encounter this dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Description

1. The variable in PHP refers to the amount by which the value used in the program can be changed. On the contrary, it is constant.

2. After the constant value is defined, nothing else in the script can be changed.

Format

Define (string $name, mixed $value, bool $case_insensitive = false)

$name: general name.

$value: constant value; in PHP5, value must be a standard value (int, float, string, boolean, null) or an array value in PHP7.

$case_insensitive: if set to true, it is case insensitive. By default, case is sensitive. PHP7.3.0 discards constants that define case-insensitivity.

Return value: true is returned on success and false on failure.

Example

Allowed to be array

Define ('People', array (' man', 'woman',' strick')); echo People [1];? > 1 output: woman "how to define constants in PHP" is introduced here, thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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