PHP | Check data type in php | gettype() | var_dump() By using gettype() function we can check the data type of a variable. we can also use var_dump() function for the same.   gettype() <?php echo …

PHP | How to convert a string to an array? string to array There is a function in PHP called explode() which is used to convert any string to an array.    <?php $str = …

Enable errors in PHP There are two ways to enable error reporting in your PHP scripts: 1. You can add the following function in the the script: error_reporting(E_ALL); 2. You can add the following option in …

Mysql | Trigger The trigger can be defined as a database object just like a stored procedure. It is a set of actions that fires automatically when an event occurs in a database.   Triggers …

PHP | What is difference between == and === operator? "==" and "===" The two operators are known as comparison operators. "==" (i.e. equal)  and === (i.e. identical) both are use to check values are …

PHP | magic function In PHP all functions start with __ names are magical functions. Magical functions always live in a PHP class. The definition of the magical function is defined by the programmer itself. …

PHP | Syntax, and Tags PHP introduces a list of Tags to code PHP. PHP tags allow the PHP parsing engine to get in and get out from the PHP block. A PHP script can …

MySQL | What is the best collation to use for MySQL? Mostly we use: utf8_general_ci utf8_unicode_ci utf8_general_ci is used for fast sorting but it is less accurate whereas utf8_unicode_ci is used for better accuracy but …

PHP | How to avoid errors in PHP? We can use PHP inbuilt function error_reporting(0) to avoid all errors in PHP file. <?php error_reporting(0); ?>  

PHP | Find the number of rows in a result set Bellow code is use for the same $sql = "SELECT * FROM table1"; $result = mysql_query($sql, $db_link); $num_rows = mysql_num_rows($result); echo $num_rows;  

PHP |  date() function By using the PHP date() function we can find the current date and time. <?php echo date(“d-m-Y”); //This will print today date. echo date (“d-m-Y h:i:s”) // This will print today’s date …

PHP | Length of a string There is a string function called strlen() which is used to find the length of a string. It accepts a string that returns the length of the given string.  …

PHP | Array error fix | array_merge() The output will be as follows: array(2) { [0]=> int(1) [1]=> int(2) } NULL NULL It will also generate two warning messages as follows: Warning: array_merge(): Argument #2 …

PHP | require() and require_once() Both require() and require_once() is use to include a file but the difference is required_once() function checks if the file already included or not where  require() function does not check. …

PHP | Increase default session  timeout The "session.gc_maxlifetime" is use to modify the default timout of session. server should keep session data for AT LEAST 1 hour by using the below code. It increase session …