02c04-1.php

介绍PHP5的给类型函数应用

<?php
// Calculating Simple Interest:
function calc_simple_interest($principal, $annualrate, $years) {
    return $principal * $annualrate * $years;
}

// Calculate the interest on a 6 year car loan for $22,000, 
//  with 5.39% interest.  Answer: 7114.8
echo calc_simple_interest(22000, .0539, 6), '<br />';

// Calculate the interest on a 6 month for $1000, at 8.5% interest.
//  Answer: 42.5
echo calc_simple_interest(1000, .085, .5);
?>