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Basic PHP tutorial syntax

Source: Internet
Author: User
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PHP script block with <? Start with PHP and start with?> End. You can place PHP script blocks anywhere in the document.
Of course, you can use <? And?> To start and end the script block.
However, to achieve the best compatibility, we recommend that you use the standard form (<? PHP), rather than the abbreviated form. CopyCode The Code is as follows: <? PHP
?>

PHP files usually contain HTML tags, like an HTML file and some PHP script code.
Below, we provide a simple PHP script, which can output the text "Hello World" to the browser ":Copy codeThe Code is as follows: <HTML>
<Body>
<? PHP
Echo "this is Php tutorial network! ";
?>
</Body>
</Html>

each line of code in PHP must end with a semicolon. A semicolon is a Separator Used to differentiate the instruction set.
there are two basic commands for outputting text through PHP: ECHO and print. In the above example, we use 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 comments. copy Code the code is as follows:

// This is a comment
/*
This is a big comment,
you can comment multiple lines
*/
echo "test string1";
echo "
"; // Add "
" Here to generate a new line on the web page, that is, line feed
echo "
";
// echo "test string2
";
// echo "test string3
";
echo "test string4
";
?>

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