{"id":128344,"date":"2023-05-04T16:51:11","date_gmt":"2023-05-04T11:21:11","guid":{"rendered":"https:\/\/www.vskills.in\/certification\/tutorial\/?page_id=128344"},"modified":"2024-04-12T14:33:26","modified_gmt":"2024-04-12T09:03:26","slug":"database-connection-in-php","status":"publish","type":"page","link":"https:\/\/www.vskills.in\/certification\/tutorial\/database-connection-in-php\/","title":{"rendered":"Database connection in PHP"},"content":{"rendered":"\n<h4 class=\"wp-block-heading\"><strong>Database connection in PHP<\/strong><\/h4>\n\n\n\n<p>To connect to a database using PHP, you can use the <code>mysqli<\/code> or <code>PDO<\/code> extensions. Here&#8217;s an example using <code>mysqli<\/code>:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\/\/ Database credentials\r\n$servername = \"localhost\";\r\n$username = \"username\";\r\n$password = \"password\";\r\n$dbname = \"database_name\";\r\n\r\n\/\/ Create connection\r\n$conn = new mysqli($servername, $username, $password, $dbname);\r\n\r\n\/\/ Check connection\r\nif ($conn->connect_error) {\r\n    die(\"Connection failed: \" . $conn->connect_error);\r\n}\r\necho \"Connected successfully\";\r<\/pre>\n\n\n\n<p>In this example, replace <code>localhost<\/code> with the hostname or IP address of your database server, <code>username<\/code> and <code>password<\/code> with the credentials to authenticate with the database, and <code>database_name<\/code> with the name of the database you want to connect to.<\/p>\n\n\n\n<p>You can then use the <code>$conn<\/code> variable to execute queries on the database. Don&#8217;t forget to close the connection when you&#8217;re done:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\/\/ Execute a query\r\n$sql = \"SELECT * FROM table_name\";\r\n$result = $conn->query($sql);\r\n\r\n\/\/ Process the results\r\nif ($result->num_rows > 0) {\r\n    while ($row = $result->fetch_assoc()) {\r\n        \/\/ Do something with each row\r\n    }\r\n} else {\r\n    echo \"0 results\";\r\n}\r\n\r\n\/\/ Close the connection\r\n$conn->close();\r<\/pre>\n\n\n\n<p>Note that using <code>mysqli<\/code> directly is not recommended for security reasons. It&#8217;s better to use prepared statements to avoid SQL injection attacks. You can also use the <code>PDO<\/code> extension, which supports multiple databases and has built-in support for prepared statements.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Apply for PHP Certification!<\/strong><\/h3>\n\n\n\n<p><a href=\"https:\/\/www.vskills.in\/certification\/certified-php-developer\">https:\/\/www.vskills.in\/certification\/certified-php-developer<\/a><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong><a href=\"https:\/\/www.vskills.in\/certification\/tutorial\/php-developer\/\" target=\"_blank\" rel=\"noreferrer noopener\">Back to Tutorials<\/a><\/strong><\/h4>\n","protected":false},"excerpt":{"rendered":"<p>Database connection in PHP To connect to a database using PHP, you can use the mysqli or PDO extensions. Here&#8217;s an example using mysqli: \/\/ Database credentials $servername = &#8220;localhost&#8221;; $username = &#8220;username&#8221;; $password = &#8220;password&#8221;; $dbname = &#8220;database_name&#8221;; \/\/ Create connection $conn = new mysqli($servername, $username, $password, $dbname); \/\/ Check connection if ($conn->connect_error) {&#8230;<\/p>\n","protected":false},"author":23,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[248],"tags":[],"class_list":["post-128344","page","type-page","status-publish","hentry","category-php-developer"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Database connection in PHP - Tutorial<\/title>\n<meta name=\"description\" content=\"Database connection in PHP\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vskills.in\/certification\/tutorial\/database-connection-in-php\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Database connection in PHP - 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