What do the if and else statements do in PHP?

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. if…elseif…else statement – executes different codes for more than two conditions. switch statement – selects one of many

When to extend an IF statement in PHP?

It extends an if statement to execute a single statement or a group of statements if a certain condition is met. It can not do anything if the condition is false. The following example display ‘x is greater than y’, ‘x is equal to y’ or ‘x is smaller than y’ depends on the value of $x or $y.

When do you use conditional statements in PHP?

PHP Conditional Statements. Very often when you write code, you want to perform different actions for different conditions. You can use conditional statements in your code to do this. In PHP we have the following conditional statements: if statement – executes some code if one condition is true.

How does the if structure work in PHP?

PHP features an if structure that is similar to that of C: As described in the section about expressions, expression is evaluated to its Boolean value. If expression evaluates to TRUE , PHP will execute statement, and if it evaluates to FALSE – it’ll ignore it.

What are the parameters of the iferror function in Excel?

Excel IFERROR Function takes two parameters. Value is a formula to check for an error. And the second one is the value to be returned if the first argument evaluate an error. value: Value is a required parameter.

What does iferror do in VLOOKUP in Excel?

And trap the result using IFERROR function. This formula will checks an expression using IF and returns the defined value. If it returns an error, error message will be displayed in the Cell. We can also Combine IF, IFERROR Functions with VLOOKUP in Excel to create advanced Formulas.

How does an error handler work in PHP?

When it is triggered, it gets the error level and an error message. It then outputs the error level and message and terminates the script. Now that we have created an error handling function we need to decide when it should be triggered. The default error handler for PHP is the built in error handler.