freeCodeCamp/guide/english/php/conditionals/index.md

title
Conditionals

Conditionals

Conditionals in PHP are written using the if, elseif, else syntax. Using conditionals allows you to perform different actions depending on different inputs and values provided to a page at run time. In PHP conditionals are often referred to as control structures.

If

<?php
if ($_GET['name'] = "freecodecamp"){
  echo "You viewed the freeCodeCamp Page!";
}

Elseif

<?php
if ($_GET['name'] = "freecodecamp"){
  echo "You viewed the freeCodeCamp Page!";
} elseif ($_GET['name'] = "freecodecampguide"){
  echo "You viewed the freeCodeCamp Guide Page!";
}

Else

<?php
if ($_GET['name'] = "freecodecamp"){
  echo "You viewed the freeCodeCamp Page!";
} elseif ($_GET['name'] = "freecodecampguide"){
  echo "You viewed the freeCodeCamp Guide Page!";
} else {
  echo "You viewed a page that does not exist yet!";
}

Note

In cases where you have a lot of possible conditions you may want to use a Switch Statement.

More Information:

• php.net control structures manual