<?php
echo "使用rand(0,10)函数,输出0~10之间的随机数"."<br/>";
echo rand(0,10)."<br/>";
$str = "I love china";
echo "使用trim('$str')函数去除空格"."<br/>";
echo trim($str)."<br/>";
echo "打印格式化输出printf()函数的使用"."<br/>";
$format = "%5s";
printf($format,$str);
echo "<br/>";
echo "字母大小写转换函数strtoupper(),strtolowwer()的使用"."<br/>";
echo strtoupper($str)."<br/>";
echo "特殊字符处理函数addslaches()和stripslaches()的使用"."<br/>";
$str = "Who's John Adams?";
echo $str . " This is not safe in a database query.<br />";
echo addslashes($str) . " This is safe in a database query."."<br/>";
echo stripslashes("Who\'s John Adams?");
?>