How to get the client IP address in PHP?
$_SERVER['REMOTE_ADDR'] id use to get the IP address of the user. But sometime it may not return the true IP address of the client at all time. Use Below code to get true IP …
Overriding the save method in Django
Django | Overriding the save method The save method is inherited from models.Model class. It is used to override the save method before storing the data in the database. This is used when there is …
What will be the output of the following statements and why?
PHP | Output of the following statements var_dump(0123 == 123); var_dump('0123' == 123); var_dump('0123' === 123 var_dump(0123 == 123) This will output bool(false) because the leading 0 in 0123 tells the PHP interpreter to treat the …
What do you mean by foreign key?
SQL | Foreign Key A foreign key is a key used to link two tables. A Primary key of a table is used as a foreign key for the other table. The primary key …
What is PHP Variables
PHP | Variable A variable is a user define keyword which is used to store value like string, number, and array. Once a variable is defined then we can use it one or more than …
Comments in PHP
PHP | Comments A comment in PHP code is a line that is not executed as a part of the program. It's only read by someone who is looking at the code. By reading the comments …
Why we use isset in PHP?
PHP | isset() The isset () function is used to check whether a variable is set or not. It returns true if a variable is set otherwise it returns false. <?php $var = "StudyZone4U.com"; …
Export and import database using SSH
SSH | Export and Import Large Database OR Table Using SSH can be a good practice to manage the files and databases on your account. It is most important to use in the following circumstance …
Converting array of objects to array in php
PHP | Converting array of objects to array Array of objects look like this: Array ( [0] => stdClass Object ( [id] => 1 [name] => Ram [roll] => 12 ) [1] => stdClass Object ( …
In which files routes are defined in Codeigniter?
Codeigniter | routes Routing rules are defined in your application/config/routes.php file. In it, you'll see an array called $route that permits you to specify your own routing criteria. Routes can either be specified using …
How do you define a constant in php?
Constant in PHP The define() function is used to defining a constant in PHP define("GREETING", "Welcome to StudyZone4U.com"); Constants are like variables except that once they are defined they cannot be changed or undefined …
How to redirect a page in PHP?
PHP | Redirect PHP header() function is used to redirect a page to another page. It supplies raw HTTP headers to the browser and redirects it to another location. The redirection script should be at …
SQL Update statement
SQL Update statement The UPDATE statement is used to update the records of an existing table in a database. We can update single as well as multiple columns using SQL update statement. The basic syntax …
Web Scraping with PHP
PHP | Web Scraping Web scraping is used to get specific data from another website when there is no API available for it. There are many techniques for web scraping. You can read more about this …
How we can find last insert id in table?
MySQL | Find last insert id in the table By using the MySQL function mysqli_insert_id() we can retrieve the last inserted id in the database table. <?php $con = mysqli_connect("localhost","user_name","user_password","db_name"); if (mysqli_connect_errno()) { echo …