常用函数
作者:互联网
一、foreach 循环
echo "<br/>";
$arr = array(1=>"23",2=>"234");
foreach ($arr as $k=>$v){
echo $k;
echo "<br/>";
echo $v;
echo "<br/>";
}
die();
二、递归
function digui($a)
{
if($a <=1)
{
return 1;
}else{
return $a * digui($a - 1);
}
}
echo "<br/>";
echo digui(3);
die();
三、自定义过滤函数
function zc_check($string)
{
if(!is_array($string)){
if(get_magic_quotes_gpc()){
return htmlspecialchars(trim($string));
}else{
//$string = trim($string) //去除字符串两边的空白字符
//$string = htmlspecialchars(htmlspecialchars) //实体化输出<>等
//$string = addslashes($string) //转义',"等注入字符
return addslashes(htmlspecialchars(trim($string)));//相当于执行一遍上面的注释
}
}
foreach ($string as $k => $v) $string[$k] = zc_check($v);
return $string;
}
if($_REQUEST){
$_POST = zc_check($_POST);
$_GET = zc_check($_GET);
var_dump($_GET);
die();
}
四、全局
$a = "Original";
$my_array = array("a" => "Cat", "b" => "Dog", "c" => "Horse");
//$a = "Cat"
//$b = "Dog"
//$c = "Horse"
extract($my_array); //相当于执行一遍上面的注释
echo "\$a = $a; \$b = $b; \$c = $c";
die();
标签:常用,函数,zc,echo,array,htmlspecialchars,check,string 来源: https://www.cnblogs.com/lnterpreter/p/14121070.html