我正在尝试验证php中的用户输入。此代码将检查值是否为null。如果为null，则需要用户输入null值。当html表单中的所有文本框都出现在此之前。此代码将显示提交按钮，该提交按钮将输入的数据保存到mysql数据库中。但问题是保存的值是零和零，这可能是什么原因？
<html>
<head>
<title>Admission Information Sheet</title>
<meta http-equiv="Content-Type" content="text/html; Western (ISO-8859-1)">
<meta name="author" content=" ">
<title>
<style>
input { font-size: 16px;}
</style>
<?php include('header.php'); ?>
<div id="main_content">
</div>
<?php include('footer.php'); ?>
<table border="1" width="900" border="0" align="left" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<form name="form1.1" method="POST" action="aisaction.php">
<?php
$NURSE = $_POST[nurse];
$TELNUM = $_POST[telnum];
$HOSPNUM = $_POST[hnum];
$ROOMNUM = $_POST[rnum];
$LASTNAME = $_POST[lname];
$FIRSTNAME = $_POST[fname];
$MIDNAME = $_POST[mname];
$AD = $_POST[ad];
$ADATE = $_POST[adate];
$ADTIME = $_POST[adtime];
$CSTAT = $_POST[cs];
$AGE = $_POST[age];
$BDAY = $_POST[bday];
$SEX = $_POST[sex];
?>
<td>
<table width="100%" border="0" cellpadding="2" cellspacing="1" bgcolor="#FFFFFF">
<tr>
<td colspan="12" style="background:#9ACD32; color:white; border:white 1px solid; text-align: center"><strong><font size="3">ADMISSION INFORMATION SHEET</strong></td>
</tr>
<tr>
</td><br>
<td width="54"><font size="3">Hospital #</td>
<td width="3">:</td>
<td width="168"><input type="display" name="hnum" disabled="true" value= "<?php print "$HOSPNUM";?>"><br>
<font color="red">
<?php
if(empty($HOSPNUM))
print "* Hospital Number required!<br>";
?>
</td>
<td width="41"><font size="3">Room #</td>
<td width="3">:</td>
<td width="168"><input type="display" name="rnum" disabled="true" value= "<?php print "$ROOMNUM";?>"><br>
<font color="red">
<?php
if(empty($ROOMNUM))
print "* Room Number required!<br>";
?>
</td>
<td width="67"><font size="3">Admission Date</td>
<td width="3">:</td>
<td width="168"><input type="display" name="adate" disabled="true" value= "<?php print "$ADATE";?>"><br>
<font color="red">
<?php
if(empty($ADATE))
print "* Admission Date required!<br>";
?>
</td>
</tr>
<tr>
<td><font size="3">Last Name</td>
<td>:</td>
<td><input type="display" name="lname" disabled="true" value= "<?php print "$LASTNAME";?>"><br>
<font color="red">
<?php
if(empty($LASTNAME))
print "* Last Name required!<br>";
?>
</td>
<td><font size="3">First Name</td>
<td>:</td>
<td><input type="display" name="fname" disabled="true" value= "<?php print "$FIRSTNAME";?>"><br>
<font color="red">
<?php
if(empty($FIRSTNAME))
print "* First Name required!<br>";
?>
</td>
<td><font size="3">Middle Name</td>
<td>:</td>
<td><input type="display" name="mname" disabled="true" value= "<?php print "$MIDNAME";?>"><br>
<font color="red">
<?php
if(empty($MIDNAME))
print "* Middle Name required!<br>";
?>
</td>
<td><font size="3">Admit time</td>
<td>:</td>
<td><input type="display" name="mname" disabled="true" value= "<?php print "$ADTIME";?>"><br>
<font color="red">
<?php
if(empty($ADTIME))
print "* Adtime required!<br>";
?>
</td>
</tr>
<tr>
<td><font size="3">Civil Status</td>
<td>:</td>
<td><input type="display" name="cs" disabled="true" value= "<?php print "$CSTAT";?>"><br>
<font color="red">
<?php
if(empty($CSTAT))
print "* Civil Status required!<br>";
?>
</td>
<td><font size="3">Age</td>
<td>:</td>
<td><input type="display" name="age" disabled="true" value= "<?php print "$AGE";?>"><br>
<font color="red">
<?php
if(empty($AGE))
print "* Age required!<br>";
?>
</td>
<td><font size="3">Birthday</td>
<td>:</td>
<td><input type="display" name="bday" disabled="true" value= "<?php print "$BDAY";?>"><br>
<font color="red">
<?php
if(empty($BDAY))
print "* Birthday required!<br>";
?>
</td>
</tr>
<tr>
<td><font size="3">Address</td>
<td>:</td>
<td><input type="display" name="address" disabled="true" value= "<?php print "$AD";?>"><br>
<font color="red">
<?php
if(empty($AD))
print "* Address required!<br>";
?>
</td>
<td><font size="3">Telephone #</td>
<td>:</td>
<td><input type="display" name="telnum" disabled="true" value= "<?php print "$TELNUM";?>"></td>
<td width="23"><font size="3">Sex</td>
<td width="3">:</td>
<td width="174"><input type="display" name="sex" disabled="true" value= "<?php print "$SEX";?>"><br>
<font color="red">
<?php
if(empty($SEX))
print "* Gender required!<br>";
?>
</td>
</tr>
<tr>
<td><font size="3">Pls. Check</td>
<td>:</td>
<td><input name="stats1" type="checkbox" id="SSS" value="SSS">SSS</td>
<td><font size="3"></td>
<td>:</td>
<td><input name="stats1" type="checkbox" id="nonmed" value="NonMedicare">Non Medicare</td>
<td><font size="3"></td>
<td>:</td>
<td><input name="stats1" type="checkbox" id="sh" value="stockholder">Stockholder</td>
</tr>
<tr>
<td><font size="3"></td>
<td></td>
<td><input name="stats1" type="checkbox" id="gsis" value="GSIS">GSIS</td>
<td><font size="3"></td>
<td></td>
<td><input name="stats1" type="checkbox" id="senior" value="seniorcitizen">Senior-Citizen</td>
<tr>
<td><font size="3"></td>
<td></td>
<td><input name="stats1" type="checkbox" id="dep" value="dependent">Dependent</td>
<td><font size="3"></td>
<td></td>
<td><input name="stats1" type="checkbox" id="emp" value="employee">Employee</td>
</tr>
<tr>
<td><font size="3">Attending Nurse</td>
<td>:</td>
<td><input type="display" name="nurse" disabled="true" value= "<?php print "$NURSE";?>"><br>
<font color="red">
<?php
if(empty($NURSE))
print "* Admitting/Attending Nurse required!<br>";
?>
</td>
</tr>
<tr>
<td> </td>
<td> </td>
<td><input type="button" value="Back" onClick="history.go(-1);return true;">
<?php
$val1 = $_POST['NURSE'];
if($_POST['NURSE'] !="")
{
?>
<form action="aisaction.php" method="POST" target="_window">
<input type="hidden" name="submit" value="yes">
<input type="submit" value="submit">
</form>
<?php
}
?>
</td>
</td>
</tr>
</table>
</td>
</form>
</tr>
</table>
</head>
</html>
答案 0 :(得分：0)
更好的方法是使用类似“isset（）”的方法实际检查$ _POST数组中的值。
e.g。
if(!isset($_POST['whatever']))
此外，如果您的预期值均不为零，则可以随时添加
if(empty($WHATEVER)||$WHATEVER==0)
*** P.S。正如Gordon所提到的，如果您提供用于将信息插入数据库的代码，并了解您的数据库架构，那将极大地帮助我们为您提供更准确的答案
祝你好运！
答案 1 :(得分：0)
最简单，最好的方法是对表单使用jQuery Validation，它会在将表单数据发送到服务器之前自动验证表单数据。我更喜欢使用它然后验证服务器中的东西
答案 2 :(得分：0)
这就是我通常在PHP中处理表单和验证的方式。我不打算重新格式化你的完整代码，所以我只是展示了这个方法。
实例：http://kopli.pri.ee/stackoverflow/2351193.php
完整版代码：*
<?php
function is_valid_email ($email) {
if(!preg_match('/^([a-z0-9])(([-a-z0-9._])*([a-z0-9]))*\@([a-z0-9])' . '(([a-z0-9-])*([a-z0-9]))+' . '(\.([a-z0-9])([-a-z0-9_-])?([a-z0-9])+)+$/i', $email)) {
return true;
} else {
return false;
}
}
if ($_POST['trigger']) {
$p_name = $_POST['name'];
$p_email = $_POST['email'];
if (empty($p_name)) {$posting_errors[] = 'Name is missing!';}
if ($p_name and strlen($p_name) < 3) {$posting_errors[] = 'Name is too short!';}
if (empty($p_email)) {$posting_errors[] = 'Email is missing!';}
elseif (is_valid_email($p_email)) {$posting_errors[] = 'Email is incorrect!';}
if ($posting_errors) {
$posting_message = '<div class="error_message">' . implode('<br />', $posting_errors) . '</div>';
} else {
$posting_message = '<div class="success_message">Great success!</div>';
}
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>trying to validate user input in php - Kalle H. Väravas</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<style>
html, body {margin: 0px; padding: 0px; background: #CCFFFF;}
label {font-weight: bold; width: 140px; display: inline-block; padding: 5px;}
.success_message,
.error_message {display: inline-block; padding: 2px 5px; font-weight: bold; margin-bottom: 5px;}
.success_message {background: #A9F5AB;}
.error_message {background: #FF8080;}
#global_container {margin: 20px auto; width: 500px; padding: 20px; background: #FFFFFF;}
</style>
</head>
<body>
<div id="global_container">
<?php echo $posting_message; ?>
<form method="post">
<input name="trigger" type="hidden" value="1" />
<label>Name:</label><input name="name" type="text" value="<?php echo ($_POST['name'] ? $_POST['name'] : '') ?>" /><br />
<label>Email:</label><input name="email" type="text" value="<?php echo ($_POST['email'] ? $_POST['email'] : '') ?>" /><br />
<input type="submit" value="Submit" />
</form>
</div>
</body>
</html>