php非空验证
2020-12-13 05:37
标签:style blog class c code java
我想说这种方法是不是很常用的非空验证,现在的普遍使用的是javascript来验证非空,但是作为学习php的一些知识点,还是可以看看的。
先来看看commit.php中的方法
php $db = mysql_connect(‘localhost‘,‘root‘,‘Ctrip07185419‘); mysql_select_db(‘moviesite‘,$db) or die(mysql_error($db)); mysql_query(‘set names "gb2312"‘,$db); ?> php switch($_GET[‘action‘]) { case "add": { switch($_GET[‘type‘]) { case ‘movie‘: $error = array(); $movie_name = isset($_POST[‘movie_name‘]) ? trim($_POST[‘movie_name‘]) : ‘‘; if(empty($movie_name)) { $error[] = urlencode(‘Please enter an movie name‘); } $movie_type = isset($_POST[‘movie_type‘]) ? trim($_POST[‘movie_type‘]) : ‘‘; if(empty($movie_type)) { $error[] = urldecode(‘Please enter an movie type‘); } $movie_year = isset($_POST[‘movie_year‘]) ? trim($_POST[‘movie_year‘]) : ‘‘; if(empty($movie_year)) { $error[] = urldecode(‘Please enter an movie year‘); } $movie_leadactor = isset($_POST[‘movie_leadactor‘]) ? trim($_POST[‘movie_leadactor‘]) : ‘‘; if(empty($movie_leadactor)) { $error[] = urldecode(‘Please enter an movie leadactor‘); } $movie_director = isset($_POST[‘movie_director‘]) ? trim($_POST[‘movie_director‘]) : ‘‘; if(empty($movie_director)) { $error[] = urldecode(‘Please enter an movie director‘); } $movie_release = isset($_POST[‘movie_release‘]) ? trim($_POST[‘movie_release‘]) : ‘‘; if(empty($movie_release)) { $error[] = urldecode(‘Please enter an movie release‘); } else if(!preg_match(‘|^\d{2}-\d{2}-\d{4}$|‘ , $movie_release)) { $error[] = urlencode(‘Please enter a date in dd-mm-yyyy format‘); } else { list($day, $month, $year) = explode(‘-‘, $movie_release); if(!checkdate($month , $day , $year)) { $error[] = urldecode(‘please enter a validate date‘); } else { $movie_release = mktime(0, 0, 0, $month, $day, $year); } } $movie_rating = isset($_POST[‘movie_rating‘]) ? trim($_POST[‘movie_rating‘]) : ‘‘; if(empty($movie_rating)) { $error[] = urldecode(‘Please enter an movie leadactor‘); } else if(!is_numeric($movie_rating)) { $error[] = urlencode(‘Please enter a numeric rating‘); } else if($movie_rating $movie_rating > 10) { $error[] = urlencode(‘Please enter a rating between 1 and 10‘); } if(empty($error)) { //var_dump($movie_rating); //注意是movie_type不是mvioe_type,大错特错 $query = ‘insert into movie(movie_name,movie_year,movie_type,movie_leadactor,movie_director,movie_release,movie_rating) values("‘.$movie_name.‘",‘.$movie_year.‘,‘.$movie_type.‘,‘.$movie_leadactor.‘,‘.$movie_director.‘,‘.$movie_release.‘,‘.$movie_rating.‘)‘; } else { //注意是Location不是Lacotion,大错特错 header(‘Location:movie_checkformat.php?action=add&error=‘ . join($error , urlencode(‘
‘))); //var_dump($error); //var_dump($_POST); } break; } break; } case ‘edit‘: switch($_GET[‘type‘]) { case ‘movie‘: { $error = array(); $movie_name = isset($_POST[‘movie_name‘]) ? trim($_POST[‘movie_name‘]) : ‘‘; if(empty($movie_name)) { $error[] = urlencode(‘Please enter an movie name‘); } $movie_type = isset($_POST[‘movie_type‘]) ? trim($_POST[‘movie_type‘]) : ‘‘; if(empty($movie_type)) { $error[] = urldecode(‘Please enter an movie type‘); } $movie_year = isset($_POST[‘movie_year‘]) ? trim($_POST[‘movie_year‘]) : ‘‘; if(empty($movie_year)) { $error[] = urldecode(‘Please enter an movie year‘); } $movie_leadactor = isset($_POST[‘movie_leadactor‘]) ? trim($_POST[‘movie_leadactor‘]) : ‘‘; if(empty($movie_leadactor)) { $error[] = urldecode(‘Please enter an movie leadactor‘); } $movie_director = isset($_POST[‘movie_director‘]) ? trim($_POST[‘movie_director‘]) : ‘‘; if(empty($movie_director)) { $error[] = urldecode(‘Please enter an movie director‘); } $movie_release = isset($_POST[‘movie_release‘]) ? trim($_POST[‘movie_release‘]) : ‘‘; if(empty($movie_release)) { $error[] = urldecode(‘Please enter an movie release‘); } else if(!preg_match(‘|^\d{2}-\d{2}-\d{4}$|‘ , $movie_release)) { $error[] = urlencode(‘Please enter a date in dd-mm-yyyy format‘); } else { list($day, $month, $year) = explode(‘-‘, $movie_release); if(!checkdate($month , $day , $year)) { $error[] = urldecode(‘please enter a validate date‘); } else { $movie_release = mktime(0, 0, 0, $month, $day, $year); } } $movie_rating = isset($_POST[‘movie_rating‘]) ? trim($_POST[‘movie_rating‘]) : ‘‘; if(empty($movie_rating)) { $error[] = urldecode(‘Please enter an movie leadactor‘); } else if(!is_numeric($movie_rating)) { $error[] = urlencode(‘Please enter a numeric rating‘); } else if($movie_rating $movie_rating > 10) { $error[] = urlencode(‘Please enter a rating between 1 and 10‘); } if(empty($error)) { //var_dump($_POST); $query = ‘update movie set movie_name="‘.$_POST[‘movie_name‘].‘", movie_type=‘.$_POST[‘movie_type‘].‘, movie_year=‘.$_POST[‘movie_year‘].‘, movie_leadactor=‘.$_POST[‘movie_leadactor‘].‘, movie_director=‘.$_POST[‘movie_director‘]. ‘ movie_release=‘.$_POST[‘movie_release‘].‘ movie_rating=‘.$_POST[‘movie_rating‘].‘ where movie_id=‘.$_POST[‘movie_id‘]; } else { //注意是Location不是Lacotion,大错特错 header(‘Location:movie_checkformat.php?action=add&error=‘ . join($error , urlencode(‘
‘))); } } break; } break; default: break; } if(isset($query)) { mysql_query($query,$db) or die(mysql_error($db)); } ?>Commit Done!
其实逻辑很简答的,看下面的代码
$movie_leadactor = isset($_POST[‘movie_leadactor‘]) ?
trim($_POST[‘movie_leadactor‘]) :
‘‘;
if(empty($movie_leadactor))
{
$error[] =
urldecode(‘Please enter an movie leadactor‘);
}
其实就是使用isset方法来验证输入是否为空,如果是空的话把错误信息记入到一个数组$error中,然后使用header方法跳转到填写信息的页面中,跳转的方法看上去有点糟糕,如下header(‘Location:movie_checkformat.php?action=add&error=‘
. join($error , urlencode(‘
‘)));,是将所有错误信息使用换行符来连接起来放到url中来跳转,很我觉得这个有点不合适的。
来看填写信息的页面movie_checkformat.php,
php $db = mysql_connect(‘localhost‘,‘root‘,‘Ctrip07185419‘) or die(‘can not connect to mysql‘); mysql_select_db(‘moviesite‘,$db) or die(mysql_error($db)); mysql_query(‘set names gbk‘,$db); if(isset($_GET[‘action‘]) && $_GET[‘action‘] == ‘edit‘) { $query = ‘SELECT movie_name,movie_type,movie_year,movie_leadactor,movie_director,movie_release,movie_rating FROM movie WHERE movie_id=‘.$_GET[‘id‘]; //echo $query; $result = mysql_query($query , $db) or die(mysql_error($db)); extract(mysql_fetch_assoc($result)); } else { $movie_name=‘‘; $movie_type=0; $movie_year=date(‘Y‘); $movie_leadactor=0; $movie_director=0; $movie_release=time(); $movie_rating=5; } ?>echo ucfirst($_GET[‘action‘]);?> Movie php if(isset($_GET[‘error‘]) && $_GET[‘error‘] != ‘‘) { echo ‘‘.$_GET[‘error‘].‘‘; } ?>
在html中的body开始的时候如果传递的error参数不为空则输出错误信息,代码如下:
if(isset($_GET[‘error‘]) && $_GET[‘error‘] !=
‘‘)
{
echo ‘
}
?>
很简单,这种写法也很糟糕,完全可以放在javascript中来实现,估计实际生产中很少会有人这么写的。
这里顺便看看一些常见的判断方法:
is_array():判断变量是否是一个数组
is_binary():
判断变量是否是一个二进制串
is_bool():判断布尔类型变量true还是false,1还是0
is_callable():
判断变量是否是一个可以访问的函数,估计就是判断是否是代理类型
is_int(): 判断整型
is_null():
判断是否为空
is_numeric():判断是否是数字或者数字形式的字符串吧
is_object():
判断变量是否是一个对象
is_resource(): 判断资源类型
is_string(): 判断是否是字符串类型
is_unicode():
判断是否是unicode字符串
某些时候使用is_xx方法比较慢,使用ctype_xx类型的方法较快,但是它只能检验字符串类型,不能检验对象,数组,资源类型。ctype_xx方法举例如下:
ctype_alnum(): 判断变量是否是数字类型字符串
ctype_alpha(): 判断变量全是字符串
ctype_cntrl():
判断是控制字符,就是转移字符如"\n"
ctype_digit():
判断字符串全部是数字字符,不包含任何非数组字符"."这样的也不包含
ctype_graph(): 检查是否有任何可打印字符,除了空格(补)
ctype_lower()
: 检查小写字母
ctype_print():
检查是否都是可打印字符,就是不包含转移字符,和ctype_control()是相斥的
ctype_punct(): 检查是否有任何可打印字符而不是空格或字母数字字符
ctype_space():
检查是否都是空白字符
ctype_upper() :
检查是否都是大写字符
ctype_xdigit(): 检查是否是16进制的字符串,只能包括 “0123456789abcdef”
还可以使用preg_match来检验输入,这个是用正则表达式的方式来进行检验的。
php非空验证,搜素材,soscw.com
php非空验证
标签:style blog class c code java
原文地址:http://www.cnblogs.com/tylerdonet/p/3737895.html