![]() It replaces the ternary operation in conjunction with isset() function which is used to check whether a given variable is NULL or not and returns its first operand if it exists and is not NULL else it returns the second operand. Is not set, instead of writing some lengthy code like this: $val = isset($_GET) ? $_GET : 'default' If you use the ternary shorthand operator like this, it will cause notice if $_GET It will return the first operand if the operand is true else it evaluates and returns its second operand. It is the ternary operator with the second operand omitted. It is also referred to as Elvis operatory(?Įlvis operator can be used in order to reduce redundancy of your conditions and shorten the length of your assignments. Short ternary operator syntax can be used by leaving out the middle part of the ternary operator for quick shorthand evaluation. In order to get the values of our text fields, we can use the following code: Let’s look at an example of a validation form for better understanding: $reg_number = (isset($_POST)) ? $_POST : die('Please enter your registration number') ![]() if the registration number is not specified, notify the customer Let’s say, we were programming a login form for a college university where we wanted to ensure that the user entered their registration number provided by the university then we could move further. Moreover, it is commonly used when we assign post data or validate forms. We use ternary operator when we need to simplify if-else statements that are used to assign values to variables. Statement 2: It is the statement to be executed if the condition results in a false state.Įxample program to whether student is pass or fail: =40) ? "pass" : "Fail".Statement 1: it is the statement to be executed if the condition results in a true state.Condition: It is the expression to be evaluated which returns a boolean value.Syntax: (Condition) ? (Statement1) : (Statement2) It is called a ternary operator because it takes three operands – a condition, a result for true, and a result for false. It also produces an e-notice while encountering a void value with its conditionals. Obviously, it is the best case for a time-saving option. The order of execution for this operator is from left to right. This method is an alternative for using if-else and nested if-else statements. The ternary operator is a conditional operator that decreases the length of code while performing comparisons and conditionals. In this Ternary Operator PHP, we will see how it is used for shortening conditional statements. We always look for shortcuts everywhere whether it is a route for traveling or game or code. You need to use exceptions to handle database statement errors.ĭoing the things that are being posted in the replies in your threads will help produce more secure code (there are things beyond what has been written, such as applying htmlentities() to data being output, that we haven't even gotten around to yet), produce code that will either work or it will tell you why it isn't working, and will result in simpler code (you are still copy/pasting cluttered up code that contains unnecessary things and is missing useful features.Using the if-else and switch case is an essential part of programming for evaluating conditions. You need stop putting data directly into sql query statements. a specific, non-empty, integer, $_GET parameter, is another input. the session variable, that indicates being logged in or not, is one input. Some or all of the following are recommendations that have been posted in your threads on this forum -Īll input data needs to be separately validated before using it and you need to setup unique and helpful error messages for each validation test that fails. ![]() The existence or absence of a $_GET parameter doesn't have anything to do with being logged in. This code is not secure and doesn't teach good programming practices. ![]() $stmt = mysqli_stmt_init ( $conn ) if (! mysqli_stmt_prepare ( $stmt, $sql )) // This is the second file called create_topic.php Topic Title Topic Content $sql = "SELECT id FROM categories WHERE id= '". ![]() It seems that the $_GET variable is not picking up the cid It should take me to the create_topic.php page. I will attach the two latest files, which I think should be working hand in hand below. When I tested the page at the end of that video segment, it is always saying that I am not logged in even though that I am. because I am trying to follow this tutorial on how to set up a forum but I am stucked at around the 13:23 mins mark. ![]()
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