PHP introductory tutorial (7) PHP functions

function writeMyName()
{ // bbs.it-home.org
 echo "jeremyLin";
}
writeMyName();
? >

2, function - add parameters The first function is a very simple function. It can only output a static string. Add more functionality to the function by adding parameters. A parameter is like a variable. example:

function writeMyName($fname)
{ // bbs.it-home.org
 echo $fname . "jeremy.";
}

echo "My name is ";
writeMyName("lin");

echo "My name is ";
writeMyName("kobe");

echo "My name is ";
 writeMyName("John");
?>

3. Function - return value Functions can also be used to return values.

function add($x,$y)
 {
 $total = $x + $y;
 return $total;
 }

echo "4 + 26 = " . add(4,26);
?>

output: 4+26=30

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