Control Structures Introduction in PHP (IF)

Any PHP script is built out of a series of statements. A statement can be an assignment, a function call, a loop, a conditional statement or even a statement that does nothing (an empty statement). Statements usually end with a semicolon. The various statement types are described in this chapter

if

<?phpif ($a > $b) {
  echo "a is greater than b";
} else {
  echo "a is NOT greater than b";
}?>

If expression evaluates to TRUE, PHP will execute statement, and if it evaluates to FALSE - it'll ignore it. More information about what values evaluate to FALSE can be found in the 'Converting to boolean' section.

Alternative syntax for control structures

<?php if ($a == 5): ?>A is equal to 5
<?php endif; ?>