What three types of codes can be included in a PHP program?
The codes that can be included are html, css, and JavaScript. When using the mixed writing method, the file name needs to end with .php, otherwise the PHP code cannot be parsed normally.
index.php：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
/*css*/
body{
background: #eee;
}
</style>
</head>
<body>
<!-- html -->
<p>html</p>
<!-- JavaScript -->
<script>
alert(123);
</script>
</body>
</html>
<?php
echo 'www.php.cn';
?>For more PHP related knowledge, please visit PHP Chinese website!
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