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

<?php 
$t = rand(1,10); 
if ($t < "3") 
{ 
echo "Hi! ".$t; 
} 
?>

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

 
<?php 
$t = rand(1,10); 
if ($t < "3") 
{ 
echo "Hi! ".$t; 
} 
else 
{ 
echo "Hello ".$t; 
} 
?>

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

  
<?php 
$t = rand(1,10); 
if ($t < "3") 
{ 
echo "Hi! ".$t; 
} 
elseif ($t < "7") 
{ 
echo "Hey ".$t; 
} 
else 
{ 
echo "Hello ".$t; 
} 
?>