<?php
function example($num){
return “$num*$num=”.$num*$num;
}echo example(10);?> <?php
/* function example($num){
return “$num*$num=”.$num*$num;
}echo example(10); */?> <?php
function example($m){
$m=$m*5+10;
echo “在函数内：\$m=”.$m;
}$m=1;
example($m);
?>