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#Php if else code#

This also includes combining conditions using the logical operators of and or or. Next, it will take you through writing conditional statements in PHP, including the if, else, and elseif keywords. This tutorial will start with an overview of the comparison operators that will be used to build conditional statements.

#Php if else code#

When evaluating conditions and assigning code to run based on whether or not those conditions are met, we are writing conditional code. Display the booking form for a hotel, but not if the hotel is booked.Open a dropdown on a click event, or close a dropdown if it is already open.Send a form on submit, or display warnings next to missing required fields.Check the location of a user and display the correct language based on country.If they buy 10 oranges or more, calculate a discount of 5% if they buy fewer, then don’t.If there is money in an account, calculate interest if it is overdrawn, charge a penalty fee.If the student receives over 65% on her test, report that her grade passes if not, report that her grade fails.Let’s look at some examples where we would use conditional statements:

You can compare a conditional statement to a “Choose Your Own Adventure” book, or a flowchart. If nothing happens, or they are taken to the wrong page, the user may choose to stop using that website or company completely.ĭecisions written in code are formed using conditionals: “If x, then y.” Even a button click is a form of condition: “If this button is clicked, go to a certain page.” Conditional statements are part of the logic, decision making, or flow control of a computer program. When a person clicks the contact button on a website, they expect to be taken to a contact page. For a program to do anything useful, it must be able to respond to some sort of input. From the mundane decisions about what to wear, to the life-altering decisions of jobs and family. Introductionĭecisions are an integral part of life. If we changed to $number_three to anything besides the number 3.The author selected Open Sourcing Mental Illness Ltd to receive a donation as part of the Write for DOnations program. The if statement cannot evaluate to both true and false at one time! Here is what would happen Note that the code within the if and else cannot both be executed, as On the other hand, if the if statement was false, then the code contained in the else segment would have beenĮxecuted.

The code contained within the else segment will not used.

All code that is contained between the opening curly brace "" will be executed when the if statement is true.

$number_three is indeed Equal To 3 and so this statement will evaluate to true.

To do such a comparison we use " =", which in English means "Is Equal To".

In this example we compared a variable toĪn integer value.

We first made a PHP variable called $number_three and set it equal to 3.

This is a lot to digest in one sitting, so let us step through the PHP Tutorial PHP - Introduction PHP - Installation PHP - Syntax PHP - Variables PHP - Echo PHP - Strings PHP - Operators PHP - Comments PHP - Include File PHP - Require PHP - If Statement PHP - If.Else PHP - Elseif PHP - Switch PHP - Forms PHP - Functions PHP - Array PHP - While Loop PHP - For Loop PHP - For Each PHP - Do While PHP - POST & GET PHP - Magic Quotes PHP - htmlentities PHP Files PHP - File PHP - File Create PHP - File Open PHP - File Close PHP - File Write PHP - File Read PHP - File Delete PHP - File Append PHP - File Truncate PHP - File Upload PHP Strings PHP - strpos PHP - str_replace PHP - substr_replace PHP - Capitalization PHP - explode PHP - implode PHP Advanced PHP - Date PHP - Session PHP - Cookies

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