What are the examples of PHP simple programs

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Here is an example of a simple PHP program that outputs Hello World on a standard output device, which is usually used as a program when you start learning a programming language:

< ?php echo 'Hello World!'; ?>

Or

< ? echo 'Hello World!'; ?>

From the PHP simple program example, we can see that the PHP language is embedded in the

< ?php…?>

"or"

< ?…?>

"the part between. And the end result of this program will be:

Hello World!

However, it is recommended that you write your program in this way. In the default configuration file php.ini of php, this setting is usually Off. If you need to open this setting, you can refer to the setting of "short_open_tag = Off" in php.ini.

Phpinfo

The following is an example of a PHP simple program that outputs settings about PHP on a standard output device, such as PHP variables, modules:

< ?php phpinfo(); ?>

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