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webarenaでubuntu その54

Last updated at Posted at 2019-10-03

#概要

webarenaでubuntu18.04やってみた。
練習問題やってみた。

#練習問題

画像アクセスカウンターを表示、せよ。

#サンプルコード

<?php
	$id = "test";
	$db = new PDO("mysql:host=localhost;dbname=mydb;", 'user', 'pass');
	if (!$db)
	{
		print "connect error!! <br>";
	}
	else
	{
		$sql = "UPDATE counter SET cnt = cnt + 1 WHERE id='$id'";
		$db->query($sql);
		$sql = "SELECT * FROM counter WHERE id='$id'";
		$rs = $db->query($sql);
		if (!$rs)
		{
			print "Error in database!! 0 <br>";
			print $sql;
		}
		else
		{
			$count = 0;
			while ($row = $rs->fetch())
			{
    			$count = $row['cnt'];
			}
			header('Content-Type: image/gif');
			$im = imagecreatetruecolor(200, 50);
			$color = imagecolorallocate($im, 255, 255, 255);
			imagestring($im, 5, 10, 10, $count, $color);
			imagegif($im);
			imagedestroy($im);
		}
	}
?>

#成果物

以上。

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