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PHP 5 if…else…elseif Statements

Conditional statements are used to perform different actions based on different conditions.

PHP Conditional Statements
Very often when you write code, you want to perform different actions for different decisions. You can use conditional statements in your code to do this.

In PHP we have the following conditional statements:

if statement – executes some code only if a specified condition is true
if…else statement – executes some code if a condition is true and another code if the condition is false
if…elseif….else statement – selects one of several blocks of code to be executed
switch statement – selects one of many blocks of code to be executed
PHP – The if Statement
The if statement is used to execute some code only if a specified condition is true.

Syntax

if (condition) {
code to be executed if condition is true;
}
The example below will output “Have a good day!” if the current time (HOUR) is less than 20:

Example

Select Code
<?php
$t=date("H");

if ($t<"20") {
  echo "Have a good day!";
}
?>

PHP – The if…else Statement
Use the if….else statement to execute some code if a condition is true and another code if the condition is false.

Syntax

if (condition) {
code to be executed if condition is true;
} else {
code to be executed if condition is false;
}
The example below will output “Have a good day!” if the current time is less than 20, and “Have a good night!” otherwise:

Example

Select Code
<?php
$t=date("H");

if ($t<"20") {
  echo "Have a good day!";
} else {
  echo "Have a good night!";
}
?>

PHP – The if…elseif….else Statement
Use the if….elseif…else statement to select one of several blocks of code to be executed.

Syntax

if (condition) {
code to be executed if condition is true;
} elseif (condition) {
code to be executed if condition is true;
} else {
code to be executed if condition is false;
}
The example below will output “Have a good morning!” if the current time is less than 10, and “Have a good day!” if the current time is less than 20. Otherwise it will output “Have a good night!”:

Example

Select Code
<?php
$t=date("H");

if ($t<"10") {
  echo "Have a good morning!";
} elseif ($t<"20") {
  echo "Have a good day!";
} else {
  echo "Have a good night!";
}
?>

About v.shakya

I am V.Shakya, Freelance PHP Programmer. I like to share my ideas, views and knowledge to all of you who come across my website. I am young, enthusiastic, highly motivated and self disciplined person. I completed my studies in Master of Computer Application and currently giving my technical expertise to one of the Big IT company. I have more than Ten years of experience in vast field of Programming , Designing and Development of websites and various software's.

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