PHP Tutorial Basic Syntax _php basics

PHP script blocks start with <?php and end with?>. You can place PHP script blocks anywhere in the document.
Of course, on a server that supports shorthand, you can use the. and?> to start and end script blocks.
However, in order to achieve the best compatibility, we recommend that you use the standard form (<?php) rather than the shorthand form.

Copy Code code as follows:

<?php
?>

PHP files usually contain HTML tags, like an HTML file, and some PHP scripting code.
Below, we provide a simple PHP script that can output text to the browser "Hello World":

Copy Code code as follows:

<body>
<?php
echo "This is the PHP tutorial web!";
?>
</body>

Each line of code in PHP must end with a semicolon. A semicolon is a delimiter used to differentiate a set of instructions.
There are two basic instructions for outputting text through PHP: Echo and print. In the example above, we used the Echo statement to output the text.
Comments in PHP
In PHP, we use//to write Single-line comments, or use/* and/* To write large comment blocks.

Copy Code code as follows:

<body>
<?php
This is a note
/*
This is the big note,
You can annotate multiple lines
*/
echo "Test string1";
echo "<br/>"; Add "<br/>" here to generate a new line on a Web page that wraps
echo "<br/>";
echo "Test string2<br/>";
echo "Test string3<br/>";
echo "Test string4<br/>";
?>
</body>