PHP Quick Scripting Reference

CHAPTER 6

Conditionals

Conditional statements are used to execute different code blocks based on different conditions.

If statement

The if statement will only execute if the condition inside the parentheses is evaluated to true. The condition can include any of the comparison and logical operators. In PHP, the condition does not have to be a Boolean expression.

if ($x == 1) {  echo "x is 1";}

To test for other conditions, the if statement can be extended with any number of elseif clauses. Each additional condition will only be tested if all previous conditions are false.

elseif ($x == 2) {  echo "x is 2";}

The if statement can have one else ...