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๐์น์ฌ์ดํธ์ ๋นํ์ธ๋ PHP : ์กฐ๊ฑด๋ฌธ์ ํ์ฉ ๋ณธ๋ฌธ
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| YouTube Link | |
| WEB2 PHP 13 แแ ฉแแ ฅแซแแ ฎแซแแ ดแแ ชแฏแแ ญแผ | |
| https://youtu.be/U_kj_IlbH20?si=5oqR3Afnu4a4aYzQ |
isset()
isset()๋ฌธ๋ฒ ์์์ ํด๋น ๊ฐ์ผ๋ก ์ค์ ๋์ด ์๋์ง์ ๋ฐ๋ผ True์ False๋ก ๋๋๋ค.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<h1><a href="index.php">WEB</a></h1>
<ol>
<li><a href="index.php?id=HTML">HTML</a></li>
<li><a href="index.php?id=CSS">CSS</a></li>
<li><a href="index.php?id=JavaScript">JavaScript</a></li>
</ol>
<h2>
<?php
if (isset($_GET['id'])) {
echo $_GET['id'];
} else {
echo "Welcome";
}
?>
</h2>
<?php
if (isset($_GET['id'])) {
echo file_get_contents("data/" . $_GET['id']);
} else {
echo "Hello, PHP";
}
?>
</body>
</html>
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