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variables_rules.php
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variables_rules.php
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<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<title>Tutorial 6 on PHP variables</title>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
<a class="navbar-brand" href="#">Php Tutorials</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
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<div class="container my-3">
<h2>More on PHP Variables</h2>
<h4>Rules for creating variables in php</h4>
<ul>
<li>Starts with a $ sign</li>
<li>Cannot start with a number</li>
<li>Must start with a letter or an underscore character</li>
<li>Can only contain alphanumeric characters and underscores</li>
<li>Variables in php are Case sensitive. ($harry, $hArry and $Harry are different)</li>
<?php //$name5="harry"; //echo $name5;?>
</ul>
</div>
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