PHP if...else...elseif Statements
PHP Confitional Statement
You can use conditional statements to make decisions in your code.
The most common ones are:
If statememt:
Executes a block of code if a specified condition is true.
Syntax
If( condition)
{
//code to execute if condition is true
}
Example
?php
$num=15;
if($num<50){
echo "$num is less than 100";
}
?>
// output 15 is less than 100
If-else statement:
Executes one block of code if the condition is true and another if it's false.
Symtax:
if (condition) {
// Code to execute if the condition is true
} else {
// Code to execute if the condition is false
}
Example
php
$num=112;
if($num<100)
{
echo "$num is lesser than 100";
}
else
{
echo "$num is greater than 100";
}
?>
//output 112 is greater than 100
If-else if-else statement:
Allows you to check multiple conditions and execute different code blocks accordingly.
Syntax
if (condition1)
{
// Code to execute if condition1 is true
}
elseif (condition2)
{
// Code to execute if condition2 is true
}
else
{
// Code to execute if neither condition1 nor condition2 is true
Example
<?php
$marks=74;
if ($marks<33)
{
echo "fail";
}
else if ($marks>=50 && $marks<65)
{
echo "C grade";
}
else if ($marks>=65 && $marks<80)
{
echo "B grade";
}
else if ($marks>=80 && $marks<90)
{
echo "A grade";
}
else if ($marks>=90 && $marks<100)
{
echo "A+ grade";
}
else
{
echo "Invalid input";
}
?>
//output B grade
