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PHP 5 if...else...elseif Statements

PHP - The if Statement

If statement is a control statement. The body of the if statement is executed when condition is true or nonzero. In PHP we can pass either Boolean value or any other value.

Syntax

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

Example

<?php
$a=10;
$b=10;
if($a==$b)
{
echo"successful";
}
?>

PHP - The if...else Statement

It is also a control statement. It is very useful in programming. If condition is not true the else part executed. Else has no condition.

Syntax

if (condition) {
code to be executed if condition is true;
} else {
code to be executed if condition is false;
}

Example

<?php
$a=10;
$b=10;
if($a==$b)
{
echo"successful";
}
else
{
echo"failure";
}
?>

PHP - The if...elseif....else Statement

Syntax

if (condition) {
code to be executed if this condition is true;
} elseif (condition) {
code to be executed if this condition is true;
} else {
code to be executed if all conditions are false;
}

Example

<?php
$a=10;
$b=10;
$c=10;
if($a > $b and $a > $c)
{
echo"a is largest.";
}
elseif($b > $a and $b > $c)
{
echo"b is largest";
}
elseif($c > $a and $c > $b)
{
echo" c is largest";
}
else
{
echo"a=b=c";
}
?>

$a and $b > $c) { echo"b is largest"; } elseif($c > $a and $c > $b) { echo" c is largest"; } else { echo "a=b=c"; } ">