php——函数

创建php函数：

<?php
function functionName()
{
    //要执行的代码
}
?>

如：

<?php
function writeName()
{
    echo "Kai Jim Refsnes";
}
echo "My name is ";
writeName();
?>

函数中添加参数：

用法和c++相同：

<?php
function writeName($fname)
{
    echo $fname . " Refsnes.<br>";
}
echo "My name is ";
writeName("Kai Jim");
echo "My sister's name is ";
writeName("Hege");
echo "My brother's name is ";
writeName("Stale");
?>

函数的返回值：

用法和c++相同

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

echo "1 + 16 = " . add(1,16);
?>