This is my first php program!

Flow-Control Statements
|
47
if
The
if
statement checks the truthfulness of an expression and, if the expression is
true, evaluates a statement. An
if
statement looks like:
if (
expression
)
statement
To specify an alternative statement to execute when the expression is false, use the
else
keyword:
if (
expression
)
statement
else
statement
For example:
if ($user_validated)
echo "Welcome!";
else
echo "Access Forbidden!";
To include more than one statement in an
if
statement, use a
block
—a curly brace-
enclosed set of statements:
if ($user_validated) {
echo 'Welcome!";
$greeted = 1;
} else {
echo "Access Forbidden!";
exit;
}
PHP provides another syntax for blocks in tests and loops. Instead of enclosing the
block of statements in curly braces, end the
if
line with a colon (
:
) and use a specific
keyword to end the block (
endif
, in this case). For example:
if ($user_validated) :
echo "Welcome!";
$greeted = 1;
else :
echo "Access Forbidden!";
exit;
endif;
Other statements described in this chapter also have similar alternate style syntax
(and ending keywords); they can be useful if you have large blocks of HTML inside
your statements. For example:





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