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This article introduces the relevant knowledge of "how to solve php define error problem". In the actual case operation process, many people will encounter such difficulties. Next, let Xiaobian lead you to learn how to deal with these situations! I hope you can read carefully and learn something!

php define error because it is wrong to make constants case-insensitive by defining true, the solution is to discard true as the third argument to define().

Operating environment: Windows 7 system, PHP7.1 version, DELL G3 computer

How to fix php define error?

define() method defines true and returns an error

    In PHP, we can usually define constants using the define() method, and we can also define whether constants are case-sensitive by defining the third variable as true or false, for example

define('WEB','555',true);echo web; //555echo WEB; //555

    But when I finished editing and running it, I didn't get the results I wanted, and the results were as follows.

In the second and third lines, respectively, errors are reported, but the results of the operation can be seen. I will translate the prompt content of the error:

deprecated: define (): case-insensitive constant declaration deprecated

Disrecommended: Case-insensitive constants are not recommended. The correct case for this constant is " WEB".

We also found that there was no error in the fourth line of code.

Obviously we made a mistake by defining true to make constants case-insensitive, because case-insensitive constants were deprecated in PHP 7.3,

PHP 7.3: deprecate true as the third argument to define().

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