Does PHP have else if?
In PHP we have the following conditional statements: if statement – executes some code if one condition is true. if…else statement – executes some code if a condition is true and another code if that condition is false. elseif…else statement – executes different codes for more than two conditions.
Is it else if or if else?
Use two if statements if both if statement conditions could be true at the same time. In this example, both conditions can be true. Use an if/else statement if the two conditions are mutually exclusive meaning if one condition is true the other condition must be false.
What are the 4 PHP conditional statements?
PHP Conditional Statements
- The if statement.
- The if…else statement.
- The if… elseif….else statement.
- The switch… case statement.
How do you end an if statement in PHP?
After either branch has been executed, control returns to the point after the end If . The if statement will end if none of its conditions evaluate to true or if one of its conditions evaluate to true . The statement(s) associated with the first true condition will evaluate, and the if statement will end.
IS NOT NULL in PHP?
The is_null() function checks whether a variable is NULL or not. This function returns true (1) if the variable is NULL, otherwise it returns false/nothing.
Is else if necessary?
No, It’s not required to write the else part for the if statement. In fact most of the developers prefer and recommend to avoid the else block. This is purely a matter of style and clarity. It’s easy to imagine if statements, particularly simple ones, for which an else would be quite superfluous.
Which is faster switch or if else?
A switch statement is usually more efficient than a set of nested ifs. Deciding whether to use if-then-else statements or a switch statement is based on readability and the expression that the statement is testing. Speed: A switch statement might prove to be faster than ifs provided number of cases are good.
Is empty in PHP?
PHP empty() Function The empty() function checks whether a variable is empty or not. This function returns false if the variable exists and is not empty, otherwise it returns true.
What is the difference between == and === in PHP?
Difference between == and === Two of the many comparison operators used by PHP are ‘==’ (i.e. equal) and ‘===’ (i.e. identical). The difference between the two is that ‘==’ should be used to check if the values of the two operands are equal or not.
What does a $$$ mean in PHP?
PHP $ and $$ Variables. The $var (single dollar) is a normal variable with the name var that stores any value like string, integer, float, etc. The $$var (double dollar) is a reference variable that stores the value of the $variable inside it. To understand the difference better, let’s see some examples.
Is empty or NULL PHP?
empty() This function checks whether a variable evaluates to what PHP sees as a “falsy”(a.k.a empty) value. This being said, a variable is empty if it’s undefined, null, false, 0 or an empty string.
What does if else statement mean?
An if else statement in programming is a conditional statement that runs a different set of statements depending on whether an expression is true or false.
Why to use else if?
If-else statements is used to control the flow of a program. The if statement test a condition and if the condition is true, the if statement block will execute. The else statement will execute if an if condition is not true. The elseif statement is used to form chains of conditions.
What does IF THEN ELSE mean?
Definition of: if-then-else. if-then-else. A high-level programming language statement that compares two or more sets of data and tests the results. If the results are true, the THEN instructions are taken; if not, the ELSE instructions are taken.
What is a switch statement in PHP?
The PHP switch statement is pretty much a simplified way to write multiple if statements for one variable. As you use them, you will begin to realize why they are much more convenient that writing a whole lot of if statements or elseif statements. If statements check one conditional, but switch statements can check for many different cases.
