A session is a logical object enabling us to preserve temporary data across multiple PHP pages.<\/p>\n 1. Use function Database Connection Connect mysqli with php using Object-Oriented Way. $host = “localhost”; $username = “root”; $password = “”; $conn = new mysqli($host, $username, $password); \/\/connect to server if ($conn->connect_error) { die(“Connection failed: ” . $conn->connect_error); } echo “Connected successfully”; Connect mysqli with php using Procedural Way. $host = “localhost”; $username<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_joinchat":[],"footnotes":""},"categories":[1,7],"tags":[],"class_list":["post-3682","post","type-post","status-publish","format-standard","hentry","category-uncategorized","category-web-technologies"],"aioseo_notices":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.cmscomputer.in\/blog\/wp-json\/wp\/v2\/posts\/3682"}],"collection":[{"href":"https:\/\/www.cmscomputer.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cmscomputer.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cmscomputer.in\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cmscomputer.in\/blog\/wp-json\/wp\/v2\/comments?post=3682"}],"version-history":[{"count":8,"href":"https:\/\/www.cmscomputer.in\/blog\/wp-json\/wp\/v2\/posts\/3682\/revisions"}],"predecessor-version":[{"id":3968,"href":"https:\/\/www.cmscomputer.in\/blog\/wp-json\/wp\/v2\/posts\/3682\/revisions\/3968"}],"wp:attachment":[{"href":"https:\/\/www.cmscomputer.in\/blog\/wp-json\/wp\/v2\/media?parent=3682"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cmscomputer.in\/blog\/wp-json\/wp\/v2\/categories?post=3682"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cmscomputer.in\/blog\/wp-json\/wp\/v2\/tags?post=3682"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}$host = \"localhost\";
\n$username = \"root\";
\n$password = \"\";
\n$conn = new mysqli($host, $username, $password);
\n\/\/connect to server
\nif ($conn->connect_error) {
\ndie(\"Connection failed: \" . $conn->connect_error);
\n}
\necho \"Connected successfully\";<\/code><\/p>\nConnect mysqli with php using Procedural Way.<\/h5>\n
$host = \"localhost\";
\n$username = \"root\";
\n$password = \"\";
\n$dbname = \"cmscomputer\";
\n\/\/ Create connection
\n$conn = mysqli_connect($host, $username, $password, $dbname);
\n\/\/ Check connection
\nif (!$conn) {
\ndie(\"Connection failed: \" . mysqli_connect_error());
\n}
\necho \"Connected successfully\";
\n?>
\n<\/code><\/p>\nConnect mysqli with php using PDO.<\/h5>\n
$host = \"localhost\";
\n$username = \"root\";
\n$password = \"\";
\n$conn = new PDO(\"mysql:host=$host;dbname=myDB\", $username, $password);
\n\/\/ set the PDO error mode to exception
\n$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
\necho \"Connected successfully\";<\/code><\/p>\nconvert string to uppercase in php<\/h3>\n
$string=\"cms computer training center\";
\necho strtoupper($string);<\/code><\/p>\nconvert string to lowercase in php<\/h3>\n
$string=\"CMS COMPUTER TRAINING CENTER\";
\necho strtolower($string);<\/code><\/p>\nconvert first letter of string to uppercase in php<\/h3>\n
$string=\"cakephp and zend\";
\necho ucwords($string);<\/code><\/p>\ndelete a php file from server<\/h3>\n
$file=\"full_path\/filename.php\"
\nunlink($file); \/\/make sure you have enough permission to do delete the file.<\/code><\/p>\nconvert array to json in php<\/h3>\n
$array = array('one','two');
\necho json_encode($array); \/\/use json_decode for decode<\/code><\/p>\nserialize an array in php<\/h3>\n
$array = array('php','mysql');
\necho serialize($array);\/\/use unserialize for convert serialized string to array<\/code><\/p>\nget ip address in php<\/h3>\n
$_SERVER['HTTP_USER_AGENT']<\/code><\/p>\ncount the number of elements in an array<\/h3>\n
$array = array('html','css');
\nsizeof($array);
\ncount($array);<\/code><\/p>\nSESSION and SESSION Properties and Functions.<\/h3>\n
session_start()<\/code> to initiate a session.
\n2. It is possible to propagate a session id via cookies or URL parameters.
\n3. Sessions automatically ends when the PHP script finishes executing, but can be manually ended using the session_write_close()<\/code>.
\n4. The session_unregister()<\/code> function unregister a global variable from the current session and the session_unset()<\/code> function free all session variables.
\n5. To destroy all data registered in a session use function session_destroy()<\/code>;<\/p>\n","protected":false},"excerpt":{"rendered":"