php conditional statements

PHP Conditional Statements

Conditional statement in php used to take decision on based the conditions is true or false.

There are basic four conditional statements in PHP.

if statement

if – else statement

if – elseif – else statement

switch statement


if statement

if condition – this statement is used when we want to execute a code only one condition must be true.

if condition syntax :

<?php

if (condition)
{
// condition is true then code to be executed
}

?>


if – else statement

if-else condition – this statement is used when we want to execute a code in both the condition. if condition is true execute some code, if false execute another code.

if-else condition syntax:

<?php

if(condition)
{
// condition is true
}
else
{
// condition is false
}
?>


if – elseif – else statement

if-elseif-else statement – this statement is used when we want to execute a code if one of multiple condition is true.

if-elseif-else statement syntax:

<?php

if (condition)
{
// if this condition is true then code to be executed
}
else if (condition)
{
// if this condition is true then code to be executed
}
else if (Condition)
{
// if this condition is true then code to be executed
}
else
{
// all conditions are false then this code to be executed
}
?>


switch statement

switch statement – same as if-elseif-else this statement is used we have multiple condition but only one condition true that code will be executed.

switch statement syntax:

<?php

switch (a)
{

case statement1:
if a=statement1 then code to be executed;
break;
case statement2:
if a=statement2 then code to be executed;
break;
case statement3:
if a=statement3 then code to be executed;
break;
…….
default:
if “a” is not matches with any statement then code to be executed.
}
?>

Next tutorials we will learn all php statements one by one with an example.

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