$Sql="INSERT INTO `xltxlm` (`author`, `title`, `id`, `content`, `date`) VALUES ('xltxlm', 'use`', 1, 'criterion your sql string ', '2003-07-11 00:00:00')"

<?PHP
$str="<h1>PHP</h1>";
Echo "被解释过的: ".$str."<br>经过处理的:";
Echo htmlentities(nl2br($str));
?>

<?PHP
$a="PHP";
foo();
Function foo()
{
global $a;//删除这里看看是什么结果
Echo "$a";
}
?>

<?php 
$arr = get_defined_functions(); 
Function php() {
}
echo "<pre>"; 
Echo "这里显示系统所支持的所有函数,和自定以函数phpn";
print_r($arr); 
echo "</pre>"; 
?>

<?PHP
$Date_1="2003-7-15";//也可以是:$Date_1="2003-6-25 23:29:14";
$Date_2="1982-10-1";
$Date_List_1=explode("-",$Date_1);
$Date_List_2=explode("-",$Date_2);
$d1=mktime(0,0,0,$Date_List_1[1],$Date_List_1[2],$Date_List_1[0]);
$d2=mktime(0,0,0,$Date_List_2[1],$Date_List_2[2],$Date_List_2[0]);
$Days=round(($d1-$d2)/3600/24);
Echo "偶已经奋斗了 $Days 天^_^";
?>