Example: Simple PHP User-Defined Functions
In this function, no data is being passed in and no data is being passed back out to the main part of the program.
<?php
function outHead() {
echo "<h1>Welcome</h1>";
echo "<p>This web site contains programming tutorials.</p>";
}
outHead(); // call the function
?>
Example: Simple PHP User-Defined Functions
In this function, the variable $f is being passed into the function, but no data is being passed back out into the main part of the program.
<?php
function convertF2C($f)
{
$c = round ( ($f - 32) * (5 / 9), 2);
echo "<p>$f F is equal to $c C.</p>";
}
$f=33;
convertF2C($f);
?>
Example: Simple PHP User-Defined Functions
In this function, the variable $f is being passed into the function and the variable $c is being passed back out into the main part of the program.
function convertF2C($f)
{
$c = round ( ($f - 32) * (5 / 9), 2);
return $c;
}
$f=33;
$c = convertF2C($f);
echo "<p>$f F is equal to $c C.</p>";
?>