Codeigniter | Include image, CSS, and js file In Codeigniter, we need to load URL helper in the controller and then use the base_url() function to load the resources. // loading script <script type='text/javascript' src="<?php …

SQL | difference between BETWEEN and IN operator The BETWEEN operator selects all records between the given range whereas IN operator selects all matching records given with the WHERE clause.   BETWEEN operator The Between operator in …

 PHP | implode() and explode() function implode() function is use to convert an array into a string where as explode() function is used to convert an string into an array   implode() The implode() function …

HTML | Make an anchor tag to do nothing | href="javascript:void(0);" To prevent reloading a page when a link clicked is something like preventing the default behavior of an element. It can be achieved by providing …

PHP | Case Sensitive In PHP, keywords (e.g. if, else, while, echo, etc.), classes, functions, and user-defined functions are not case-sensitive but all variable names are case-sensitive.   If you defined function name in lowercase, …

CodeIgniter | What is helpers | Load helper file Helper is simply a collection of function in a particular category which helps you with tasks. The helper file can be loaded in controller constructor, some …

Jquery | Auto Focus On Next Input Field The jquery code for autofocus on the next text input field. $(".input-key").keyup(function() { if ($(this).val().length == $(this).attr("maxlength")) { $(this).next('.input-key').focus(); } }); Let's go through the above jquery …

PHP-MYSQL |  mysqli_fetch_assoc() VS  mysqli_fetch_array() mysqli_fetch_assoc() function fetch a result row as an associative array where as mysqli_fetch_array() function fetch a result row as an associative array, a numeric array, or both.       mysqli_fetch_assoc() The mysqli_fetch_assoc() …

PHP | Add numbers of days to a date Simple and easy way to add some days in a given date using strtotime() function. <?php $p_date = "2019-01-10"; echo date('Y-m-d', strtotime($p_date . ' + 1 days')); echo …

Django rest framework  authentication error “ TypeError: 'type' object is not iterable ” This error comes because "authentication_classes" expecting an iterable(list/tuple) but somehow it is getting something else. So it needs to check a few …

PHP | Stop the execution of php script | exit() funtion By using exit() function we can stop the execution of php script.   <?php $a = 10; $b = 20; $c = $a+$b; exit(); …

$name and $$name both are variables but with a single difference that is $name is just a normal php variable where as $$name is known as reference variable. It allow you to use $name variable's …

Codeigniter | Set timezone To set default timezone in Codeigniter, you can add the date_default_timezone_set() function in your application/config.php or index.php file. date_default_timezone_set('your timezone');   <?php // India timezone date_default_timezone_set('Asia/Kolkata'); ?>  

JQuery | TinyMCE | Clear TINYMCE editor  There is a method called setContent() in TINTMCE which you can use to reset/clear the TINTMCE editor. <script> // if one editor existing in your page. tinyMCE.activeEditor.setContent(''); </script> …

Data cleaning is one of the most essential steps in any data analysis process. Raw data is often messy — it may contain missing values, duplicates, errors, or inconsistent formatting. Fortunately, Pandas provides powerful tools …