What is the use of the short opening tag '

In PHP, "PHP tutorial]

In php, whenever it reads the php document, it will look for:

<?php ?>

It only processes the code between the above tags and leaves other code around them.

Example:

<?php 
echo "Hello PHP !"; 
?>

Output:

Hello PHP !

However, in fact, when using echo() for output, we can use shortcut methods. The above example can be output using the = tag, for example:

<?= "Hello PHP !"?>

Description: "=" is a short open tag in PHP and is a shortcut for echo().

If you want to use this short tag, you must enable it from the settings in the PHP.ini file.

We need to find the following line in the PHP.ini file and add (On) to turn it on,

short_open_tag=On

However, starting from PHP version 5.4.0, regardless of the settings in the PHP.ini file Either way, short tags can be used.

Note: If you want to use XML at the same time, you can disable this option to facilitate embedded use , or you can output it through PHP. For example: ='

Let's take a look at how "=" is used through code examples.

Example 1: Normal way output

<?php 
    $username = "php中文网"; 
    echo "$username"; 
?>

Output:

php中文网

Example 2: Use: "="

<?php 
    $username = "php中文网"; 
?> 
<?= $username ?>

Improvement Click:

<?= 
$username = "GeeksforGeeks"; 
?>

Output:

php中文网

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