PHP_零基础学php_3PHP函数、传参函数、默认参数、函数返回值

<?php
function say_hello() //无参数
{
    $name="tang";
    echo "hello,".$name;
    echo "<br />";
    echo "<hr />";
}
say_hello();//函数调用

function say_helloS($some_name)//有参数
{
    echo "hello,".$some_name;
    echo "<br/>";
    echo "<hr />";
}
say_helloS("tang");
say_helloS("xue");
say_helloS("long");

function say_helloT($some_name="tangwei")//带有默认参数的函数
{
    echo $some_name." is god girl!";
}
say_helloT();
?>