mirror of
https://github.com/restoreddev/phpapprentice.git
synced 2025-10-23 19:06:05 +02:00
91 lines
4.3 KiB
HTML
91 lines
4.3 KiB
HTML
<!DOCTYPE html>
|
|
|
|
<html lang="en">
|
|
<head>
|
|
<meta charset="utf-8">
|
|
|
|
<title>Boolean Logic</title>
|
|
<meta name="description" content="">
|
|
|
|
<link rel="stylesheet" href="/css/site.css">
|
|
<link rel="icon" href="/favicon-32.png">
|
|
<script src="/js/site.js"></script>
|
|
</head>
|
|
|
|
<body>
|
|
|
|
<div class="menu">
|
|
<button class="menu-button" title="Open Menu">
|
|
<div class="icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20"><path d="M0 3h20v2H0V3zm0 6h20v2H0V9zm0 6h20v2H0v-2z"/></svg></div>
|
|
Menu
|
|
</button>
|
|
</div>
|
|
|
|
<div class="container center">
|
|
<h1>Boolean Logic</h1>
|
|
<h3 class="subtitle">Is it a yes or a no?</h3>
|
|
<div class="grid-code"><div class="doc"></div><div class="code"><pre><code class="language-php"><?php
|
|
|
|
</code></pre></div><div class="doc">Boolean logic is used to combine booleans to return another boolean.</div><div class="code"><pre><code class="language-php">
|
|
</code></pre></div><div class="doc">Using double ampersands tells PHP to check if both values are true. If so, it will return true. If not, it will return false.</div><div class="code"><pre><code class="language-php">$a = true;
|
|
$b = true;
|
|
$c = false;
|
|
|
|
</code></pre></div><div class="doc">Returns true.</div><div class="code"><pre><code class="language-php">$a && $b;
|
|
</code></pre></div><div class="doc">Returns false.</div><div class="code"><pre><code class="language-php">$a && $c;
|
|
|
|
</code></pre></div><div class="doc">Using two pipe characters checks if either value is true. Then, it will return true. If both values are false, the PHP returns false.</div><div class="code"><pre><code class="language-php">$a = true;
|
|
$b = false;
|
|
$c = false;
|
|
$d = true;
|
|
|
|
</code></pre></div><div class="doc">Returns true.</div><div class="code"><pre><code class="language-php">$a || $b;
|
|
</code></pre></div><div class="doc">Returns false.</div><div class="code"><pre><code class="language-php">$b || $c;
|
|
</code></pre></div><div class="doc">Returns true.</div><div class="code"><pre><code class="language-php">$a || $d;
|
|
|
|
</code></pre></div><div class="doc">Using an exclamation point returns the value flipped.</div><div class="code"><pre><code class="language-php">$d = true;
|
|
|
|
</code></pre></div><div class="doc">Outputs false.</div><div class="code"><pre><code class="language-php">echo !$d;
|
|
</code></pre></div></div>
|
|
<div class="clearfix"></div>
|
|
<div class="navigate-links">
|
|
<a href="/comparisons.html" title="Previous">
|
|
<div class="icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20"><path d="M10 20a10 10 0 1 1 0-20 10 10 0 0 1 0 20zm8-10a8 8 0 1 0-16 0 8 8 0 0 0 16 0zM7.46 9.3L11 5.75l1.41 1.41L9.6 10l2.82 2.83L11 14.24 6.76 10l.7-.7z"/></svg></div>
|
|
Previous
|
|
</a>
|
|
<a href="/conditionals.html" title="Next">
|
|
Next
|
|
<div class="icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20"><path d="M10 0a10 10 0 1 1 0 20 10 10 0 0 1 0-20zM2 10a8 8 0 1 0 16 0 8 8 0 0 0-16 0zm10.54.7L9 14.25l-1.41-1.41L10.4 10 7.6 7.17 9 5.76 13.24 10l-.7.7z"/></svg></div>
|
|
</a>
|
|
</div>
|
|
</div>
|
|
|
|
<div class="modal closed">
|
|
<div class="modal-content">
|
|
<button class="modal-button right" title="Close">
|
|
<div class="icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20"><path d="M2.93 17.07A10 10 0 1 1 17.07 2.93 10 10 0 0 1 2.93 17.07zm1.41-1.41A8 8 0 1 0 15.66 4.34 8 8 0 0 0 4.34 15.66zm9.9-8.49L11.41 10l2.83 2.83-1.41 1.41L10 11.41l-2.83 2.83-1.41-1.41L8.59 10 5.76 7.17l1.41-1.41L10 8.59l2.83-2.83 1.41 1.41z"/></svg></div>
|
|
</button>
|
|
<div class="table-of-contents">
|
|
<h4>Table of Contents</h4>
|
|
<a href="/index.html">Preface</a>
|
|
<ol>
|
|
<li><a href="/basics.html">Basics</a></li>
|
|
<li><a href="/variables.html">Variables</a></li>
|
|
<li><a href="/arithmetic.html">Arithmetic</a></li>
|
|
<li><a href="/comparisons.html">Comparisons</a></li>
|
|
<li><a href="/boolean-logic.html">Boolean Logic</a></li>
|
|
<li><a href="/conditionals.html">Conditionals</a></li>
|
|
<li><a href="/loops.html">Loops</a></li>
|
|
<li><a href="/arrays.html">Arrays</a></li>
|
|
<li><a href="/functions.html">Functions</a></li>
|
|
<li><a href="/classes.html">Classes</a></li>
|
|
</ol>
|
|
<a href="/credits.html">Credits</a>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
</body>
|
|
|
|
</html>
|