If/else staement

<?php
$variable1= $_POST['field1'];//set a variable to identify different conditions for an if/else statement.
//set up the if/else statement to check for a condition
if($variable1=='(SOME CONDITION)')
{
//if the variable meets the first condition, have the code inside the brackets perform some function
	echo "variable1 equals 1";
}
else
{
//if the variable does not meet the first condition, have the code inside the brackets perform another function
	echo "variable1 does not equal 1";
}
?>

DISPLAY

variable1 equals1

If/elseif staement

<?php
$variable1= $_POST['field1'];//set a variable to identify different conditions for an if/else statement.
//set up the if/else statement to check for a condition
if($variable1=='(SOME CONDITION)')
{
//if the variable meets the first condition, have the code inside the brackets perform some function
	echo "variable1 equals 1";
}
//else if can be repeated as many times as necessary
elseif($variable=='(SOME OTHER CONDITION)')
{
//if the variable meets the second condition, have the code inside the brackets perform some function
	echo "variable1 does not equal 1";
}
?>

DISPLAY

variable1 does not equal 1

If/elseif/else staement

<?php
$variable1= $_POST['field1'];//set a variable to identify different conditions for an if/else statement.
//set up the if/else statement to check for a condition
if($variable1=='(SOME CONDITION)')
{
//if the variable meets the first condition, have the code inside the brackets perform some function
	echo "variable1 equals 1";
}
//else if can be repeated as many times as necessary
elseif($variable=='(SOME OTHER CONDITION)')
{
//if the variable meets the second condition, have the code inside the brackets perform some function
	echo "variable1 does not equal 1";
}
else
{
//if the variable does not meet the first condition or second condition, have the code inside the brackets perform another function
	echo "variable1 does not equal 99";
}
?>

DISPLAY

variable1 does not equal 99