if (!($type==='') && strpos($type, $ext_name)===false)
{
echo "Please upload the file of $type form.";
exit();
}
4.尽量让你的代码清淅些,如果写成这样,是比较让人头痛的:
PHP 代码:
$foo=$_post["foo"];
$username=$_post["user"];
$group=$_POST["group"];
if ($group=="wheel")
{
$username=$username."wheel";
}
同样的代码,这样就比较让人看得舒服了:
PHP 代码:
$foo = $_post["foo"];
$username = $_post["username"];
$group = $_POST["group"];
if ($group=="wheel")
{
$username = $username."wheel";
}
当然,有一定基础后,你应该要写成这样:
PHP 代码:
$foo = &$_POST['foo'];
$username = $_POST["group"]!='wheel' ? $_POST["username"] : $_POST["username"].'wheel';
5.编写规范的 mysql 语句。
字段和表名用"`"引起来,避免保留字的影响。
如果看到下面这样的一个 sql query,会让人比较头痛:
PHP 代码:
$query="select `flash_comment`.`content` , `flash_comment`.`nickname` , `flash_comment`.`date`
, `flash_comment`.`ip` , `product`.`p_name` , `sgflash`.`fid` from `flash_comment` left join
`product` on ( `flash_comment`.`p_no` = `product`.`p_no` ) left join `sgflash` on
( `product`.`p_name` = `sgflash`.`f_name` ) where `flash_comment`.`p_no` != '' order by
`flash_comment`.`date`";
同样的一个 query,写成这样就令人看得明白得多了:
PHP 代码:
$query = "SELECT `flash_comment`.`content` , `flash_comment`.`nickname` ,
`flash_comment`.`date` , `flash_comment`.`ip` , `product`.`p_name` , `sgflash`.`fid` FROM
`flash_comment` LEFT JOIN `product` ON ( `flash_comment`.`p_no` = `product`.`p_no` )
LEFT JOIN `sgflash` ON ( `product`.`p_name` = `sgflash`.`f_name` ) WHERE
`flash_comment`.`p_no` != '' ORDER BY `flash_comment`.`date`";