You can use the PHP empty() function to find out whether a variable is empty or not. Multidimensional arrays: It contains one or more array in particular array. Here the biggest advantage is we can pass data to a different site even running at different servers. There are three types of array supported in PHP: Indexed arrays: Arrays having a numeric index. It's a design choice, for better or worse. Determine whether a variable is considered to be empty. Basically, empty() function can be used to check a variable is empty or not in PHP. Code language: PHP (php) Determine if a variable is set and is not NULL.. PHP has multiple functions used to check PHP variables with respect to their initialized values. PHP doesn't have an explicit statement to initialise variables, like Javascript's var. ""I would like to display some html code if a variable is not empty, else I would like to display nothing. using "empty" with multiple variables. The function returns a boolean value as the result of the output of the function. Associative arrays: Arrays having named keys. PHP variables get initialised when they're first assigned to. Since a variable must have some value and PHP's value for "nothing" is null, you want: empty() does not generate a warning if the variable does not exist. Arrays in PHP: Use array() Function to create an array in PHP. Passing variables with data between pages using URL There are different ways by which values of variables can be passed between pages.One of the ways is to use the URL to pass the values or data. A variable is considered empty if it does not exist or if its value equals FALSE.. Let's try out the following example to understand how this function basically works: Note: Why it is always good practice to declare an empty array and then push the items to that array? It means that the left operand gets set to the value of the assignment expression on the right. Anyway, any help would be appreciated. The difference with isset() is, isset has NULL check enabled. On the other hand, if you don’t have access to the php.ini file, and you're using the Apache web server, you could also set this variable using the .htaccess file. These functions are, isset() is to check if a variable is set with a value. empty() function in PHP. How to check whether a variable is empty in PHP. A variable is considered empty if it does not exist or if its value equals false. empty() is to check if a given variable is empty. PHP Assignment Operators. The basic assignment operator in PHP is "=". I'm pretty sure it's really simple . To create a variable you always have to assign something to it. The PHP assignment operators are used with numeric values to write a value to a variable. Obviously I want all of those variables to be checked if they are empty or not. Topic: PHP / MySQL Prev|Next Answer: Use the PHP empty() function. Again if you pass multiple variables to the PHP isset function, then if all the variables are not null, the function returns a true value. Back to the original question, " ... if variable is not empty, echo some html code. But, if the variable is not null and empty, it returns a true value. I did a quick Google and found that checking if the variables are null wouldn't be the correct way of solving this situation because an "empty string" is still not null? Here we will learn what is an empty function and how to use this function. If a variable has been unset with unset(), it will no longer be set. php_value session.auto_start 1 If you add the above line in the .htaccess file, that should start a session automatically in your PHP application. I am trying to make sure that 2 fields are filled before I insert them into my database. Seems like folks are complicating this a bit.