PHP 专注于输入
PHP Focus on input
我正在尝试创建一个 PHP 验证表单。
验证错误每次都为我正确显示。我唯一的问题是，如果出现错误，我无法将焦点设置在错误的输入上。
例如，我正在使用 $rut_error、$first_name_error、$last_name_error、$email_error、$address_error 并且我想将焦点设置在相应的输入上如果出现任何错误。
我尝试使用 javascript 但我不清楚我应该把代码放在哪里，谁能指导我如何解决它？我可以只用 PHP 解决这个问题吗？请帮忙。
我尝试进入这里但没有成功:
//First name Validation
if (empty($_POST["first_name"]) and $rut_error == '')
{
$first_name_error = "First name is required";
echo "<script>document.registration.first_name.focus();</script>";
}
我的代码如下：
addStudent.php
<html>
<head>
<title>Add Client</title>
</head>
<body>
<a href="getStudentInfo.php">Show Client</a>
<?php include('form_processStudent.php'); ?>
<div id="divAgenda">
<form id="contact" action="<?= htmlspecialchars($_SERVER["PHP_SELF"]) ?>" method="post" name = "registration">
<fieldset>
<span class="error"><?= $rut_error ?></span><br>
<input placeholder="Rut..." id="rut" type="text" name="rut" value="<?= $rut ?>" tabindex="1" size="8" maxlength="8"> - <input type="text" name="dv" value="<?= $dv ?>" size="1" tabindex="2" maxlength="1"> Ejemplo: 12345678-1<br>
</fieldset>
<fieldset>
<span class="error"><?= $first_name_error ?></span><br>
<input placeholder="Primer Nombre..." id="first_name" type="text" id="first_name" name="first_name" value="<?= $first_name ?>" maxlength="50" tabindex="3"><br>
</fieldset>
<fieldset>
<span class="error"><?= $last_name_error ?></span><br>
<input placeholder="Segundo Nombre..." id="last_name" type="text" id="last_name" name="last_name" value="<?= $last_name ?>" maxlength="50" tabindex="4"><br>
</fieldset>
<fieldset>
<span class="error"><?= $email_error ?></span><br>
<input placeholder="Correo Electrónico..." id="email" type="text" name="email" value="<?= $email ?>" maxlength="100" tabindex="5"><br>
</fieldset>
<fieldset>
<span class="error"><?= $address_error ?></span><br>
<input placeholder="Dirección..." id="address" type="text" name="address" value="<?= $address ?>" maxlength="200" tabindex="5"><br>
</fieldset>
<fieldset>
<button name="submit" type="submit" id="contact-submit" data-submit="...Sending">Enviar</button>
</fieldset>
</form>
</body>
</html>
form_processStudent.php
<?php
// define variables and set to empty values
echo"<script>
document.registration.last_name.focus();
return false;
</script>";
$rut_error = $first_name_error = $last_name_error = $email_error = $address_error = "";
$rut = $dv = $first_name = $last_name = $email = $address = "";
if(isset($_POST['submit']))
{
//RUT Validation
$rut = test_input($_POST["rut"]);
$dv = ($_POST["dv"]);
if ( empty($_POST["rut"]))
{
$rut_error = "RUT is required";
}
else if ( $dv=='' )
{
$rut_error = "Verification digit is required";
}
else if (!is_numeric($rut))
{
$rut_error = "Entered RUT is not numeric";
}
else if (!((strlen($rut) == 7) or (strlen($rut) == 8)))
{
$rut_error = "Number of digits of RUT not valid";
}
else
{
$x = 2; $s = 0; $dv2 = 0;
for($i = (strlen($rut) - 1); $i >= 0; $i--)
{
if($x > 7)
$x = 2;
$s += ($rut[$i] * $x);
$x++;
}
$dv2=11-($s % 11);
if($dv2 == 10)
$dv2 = 'K';
if($dv2 == 11)
$dv2 = '0';
if($dv2 == $dv)
{
//echo "<br>". "rut={" . $rut . "}";
//echo "<br>". "dv ={" . $dv . "}";
}
else
$rut_error = "invalid RUT";
}
//First name Validation
if (empty($_POST["first_name"]) and $rut_error == '')
{
$first_name_error = "First name is required";
echo "<script>document.registration.first_name.focus();</script>";
}
else
{
if ($rut_error == '')
{
$first_name = test_input($_POST["first_name"]);
//echo "<br>". "first_name={" . $first_name . "}";
}
}
//Last name Validation
if (empty($_POST["last_name"]) and $rut_error == '' and $first_name_error == '')
{
$last_name_error = "Second name is required";
echo "<script>function validateform()
{
document.registration.last_name.focus();
return false;
}
</script>";
}
else
{
if ($rut_error == '' and $first_name_error == '')
{
$last_name = test_input($_POST["last_name"]);
//echo "<br>". "last_name={" . $last_name . "}";
}
}
//Email Validation
if (empty($_POST["email"]) and $rut_error == '' and $first_name_error == '' and $last_name_error == '')
{
$email_error = "Email is required";
}
else
{
if ($rut_error == '' and $first_name_error == '' and $last_name_error == '')
{
$email = test_input($_POST["email"]);
//echo "<br>". "email={" . $email . "}";
// check if e-mail address is well-formed
if ((!filter_var($email, FILTER_VALIDATE_EMAIL)) and $rut_error == '' and $first_name_error == '' and $last_name_error == '')
{
$email_error = "Invalid email";
}
}
}
//Adress Validation
if (empty($_POST["address"]) and $rut_error == '' and $first_name_error == '' and $last_name_error == '' and $email_error == '')
{
$address_error = "Address is required";
}
else
{
if ($rut_error == '' and $first_name_error == '' and $last_name_error == '' and $email_error == '')
{
$address = test_input($_POST["address"]);
//echo "<br>". "address={" . $address . "}";
}
}
if ($rut_error == '' and $first_name_error == '' and $last_name_error == '' and $email_error == '' and $address_error == '')
{
//echo "<br>". "Dentro de IF";echo "<br>";
require_once('mysqli_connect.php');
$query = "INSERT INTO students (rut, dv, first_name, last_name, email, address) VALUES (?,?,?,?,?,?)";
$stmt = mysqli_prepare($dbc, $query);
mysqli_stmt_bind_param($stmt, "ssssss", $rut, $dv, $first_name, $last_name, $email, $address);
mysqli_stmt_execute($stmt);
$affected_rows = mysqli_stmt_affected_rows($stmt);
echo 'affected_rows=<' . $affected_rows . '>';
if($affected_rows == 1)
{
$rut = $dv = $first_name = $last_name = $email = $address = '';
echo "<br>"."Client Entered";
mysqli_stmt_close($stmt);
mysqli_close($dbc);
}
else
{
echo 'Error Occurred<br />';
echo mysqli_error();
mysqli_stmt_close($stmt);
mysqli_close($dbc);
}
}
}
function test_input($data)
{
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
getStudentInfo.php
<a href="addStudent.php">Add Client</a>
<?php
// Get a connection for the database
require_once('mysqli_connect.php');
// Create a query for the database
$query = "SELECT serie, rut, dv, first_name, last_name, email, address FROM students ORDER BY serie desc";
// Get a response from the database by sending the connection
// and the query
$response = @mysqli_query($dbc, $query);
// If the query executed properly proceed
if($response)
{
echo '<table align="left" cellspacing="5" cellpadding="8">
<tr><td align="left"><b>Serie </b></td>
<td align="left"><b>Rut </b></td>
<td align="left"><b>Dígito Verificador </b></td>
<td align="left"><b>Primer Nombre </b></td>
<td align="left"><b>Segundo Nombre </b></td>
<td align="left"><b>Email </b></td>
<td align="left"><b>Dirección </b></td>
</tr>';
// mysqli_fetch_array will return a row of data from the query
// until no further data is available
while($row = mysqli_fetch_array($response))
{
echo '<tr><td align="left">' . $row['serie'] . '</td>
<td align="left">' . $row['rut'] . '</td>
<td align="left">' . $row['dv'] . '</dv>
<td align="left">' . $row['first_name'] . '</td>
<td align="left">' . $row['last_name'] . '</td>
<td align="left">' . $row['email'] . '</td>
<td align="left">' . $row['address'] . '</td>'
;
echo '</tr>';
}
echo '</table>';
}
else
{
echo "Couldn't issue database query<br />";
echo mysqli_error($dbc);
}
// Close connection to the database
mysqli_close($dbc);
?>
mysqli_connect.php
<?php
// Defined as constants so that they can't be changed
DEFINE ('DB_USER', 'studentweb');
DEFINE ('DB_PASSWORD', '123');
DEFINE ('DB_HOST', 'localhost');
DEFINE ('DB_NAME', 'dbTest');
// $dbc will contain a resource link to the database
// @ keeps the error from showing in the browser
$dbc = @mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME)
OR die('Could not connect to MySQL: ' . mysqli_connect_error());
//echo "Connected...\n\n";
?>
您可以通过 javascript 完成。
您放置了一个在页面完全加载后即可运行的脚本。
该脚本将检查每个 <span class="error"> 的内容。如果找到非空的，则将焦点放在它上面。
在你的html中：
<body>
...
<script type="text/javascript">
window.onload = function(){
var errors = document.querySelectorAll('.error');
for(var i = 0, l = errors.length; i < l; i++){
var error = errors[i],
shouldForcus = error.textContent.trim().length !== 0;
if(shouldFocus){
var input = error.parentNode.querySelector('input');
input.focus();
break;
}
}
}
</script>
</body>
我正在尝试创建一个 PHP 验证表单。 验证错误每次都为我正确显示。我唯一的问题是，如果出现错误，我无法将焦点设置在错误的输入上。 例如，我正在使用 $rut_error、$first_name_error、$last_name_error、$email_error、$address_error 并且我想将焦点设置在相应的输入上如果出现任何错误。 我尝试使用 javascript 但我不清楚我应该把代码放在哪里，谁能指导我如何解决它？我可以只用 PHP 解决这个问题吗？请帮忙。
我尝试进入这里但没有成功:
//First name Validation
if (empty($_POST["first_name"]) and $rut_error == '')
{
$first_name_error = "First name is required";
echo "<script>document.registration.first_name.focus();</script>";
}
我的代码如下：
addStudent.php
<html>
<head>
<title>Add Client</title>
</head>
<body>
<a href="getStudentInfo.php">Show Client</a>
<?php include('form_processStudent.php'); ?>
<div id="divAgenda">
<form id="contact" action="<?= htmlspecialchars($_SERVER["PHP_SELF"]) ?>" method="post" name = "registration">
<fieldset>
<span class="error"><?= $rut_error ?></span><br>
<input placeholder="Rut..." id="rut" type="text" name="rut" value="<?= $rut ?>" tabindex="1" size="8" maxlength="8"> - <input type="text" name="dv" value="<?= $dv ?>" size="1" tabindex="2" maxlength="1"> Ejemplo: 12345678-1<br>
</fieldset>
<fieldset>
<span class="error"><?= $first_name_error ?></span><br>
<input placeholder="Primer Nombre..." id="first_name" type="text" id="first_name" name="first_name" value="<?= $first_name ?>" maxlength="50" tabindex="3"><br>
</fieldset>
<fieldset>
<span class="error"><?= $last_name_error ?></span><br>
<input placeholder="Segundo Nombre..." id="last_name" type="text" id="last_name" name="last_name" value="<?= $last_name ?>" maxlength="50" tabindex="4"><br>
</fieldset>
<fieldset>
<span class="error"><?= $email_error ?></span><br>
<input placeholder="Correo Electrónico..." id="email" type="text" name="email" value="<?= $email ?>" maxlength="100" tabindex="5"><br>
</fieldset>
<fieldset>
<span class="error"><?= $address_error ?></span><br>
<input placeholder="Dirección..." id="address" type="text" name="address" value="<?= $address ?>" maxlength="200" tabindex="5"><br>
</fieldset>
<fieldset>
<button name="submit" type="submit" id="contact-submit" data-submit="...Sending">Enviar</button>
</fieldset>
</form>
</body>
</html>
form_processStudent.php
<?php
// define variables and set to empty values
echo"<script>
document.registration.last_name.focus();
return false;
</script>";
$rut_error = $first_name_error = $last_name_error = $email_error = $address_error = "";
$rut = $dv = $first_name = $last_name = $email = $address = "";
if(isset($_POST['submit']))
{
//RUT Validation
$rut = test_input($_POST["rut"]);
$dv = ($_POST["dv"]);
if ( empty($_POST["rut"]))
{
$rut_error = "RUT is required";
}
else if ( $dv=='' )
{
$rut_error = "Verification digit is required";
}
else if (!is_numeric($rut))
{
$rut_error = "Entered RUT is not numeric";
}
else if (!((strlen($rut) == 7) or (strlen($rut) == 8)))
{
$rut_error = "Number of digits of RUT not valid";
}
else
{
$x = 2; $s = 0; $dv2 = 0;
for($i = (strlen($rut) - 1); $i >= 0; $i--)
{
if($x > 7)
$x = 2;
$s += ($rut[$i] * $x);
$x++;
}
$dv2=11-($s % 11);
if($dv2 == 10)
$dv2 = 'K';
if($dv2 == 11)
$dv2 = '0';
if($dv2 == $dv)
{
//echo "<br>". "rut={" . $rut . "}";
//echo "<br>". "dv ={" . $dv . "}";
}
else
$rut_error = "invalid RUT";
}
//First name Validation
if (empty($_POST["first_name"]) and $rut_error == '')
{
$first_name_error = "First name is required";
echo "<script>document.registration.first_name.focus();</script>";
}
else
{
if ($rut_error == '')
{
$first_name = test_input($_POST["first_name"]);
//echo "<br>". "first_name={" . $first_name . "}";
}
}
//Last name Validation
if (empty($_POST["last_name"]) and $rut_error == '' and $first_name_error == '')
{
$last_name_error = "Second name is required";
echo "<script>function validateform()
{
document.registration.last_name.focus();
return false;
}
</script>";
}
else
{
if ($rut_error == '' and $first_name_error == '')
{
$last_name = test_input($_POST["last_name"]);
//echo "<br>". "last_name={" . $last_name . "}";
}
}
//Email Validation
if (empty($_POST["email"]) and $rut_error == '' and $first_name_error == '' and $last_name_error == '')
{
$email_error = "Email is required";
}
else
{
if ($rut_error == '' and $first_name_error == '' and $last_name_error == '')
{
$email = test_input($_POST["email"]);
//echo "<br>". "email={" . $email . "}";
// check if e-mail address is well-formed
if ((!filter_var($email, FILTER_VALIDATE_EMAIL)) and $rut_error == '' and $first_name_error == '' and $last_name_error == '')
{
$email_error = "Invalid email";
}
}
}
//Adress Validation
if (empty($_POST["address"]) and $rut_error == '' and $first_name_error == '' and $last_name_error == '' and $email_error == '')
{
$address_error = "Address is required";
}
else
{
if ($rut_error == '' and $first_name_error == '' and $last_name_error == '' and $email_error == '')
{
$address = test_input($_POST["address"]);
//echo "<br>". "address={" . $address . "}";
}
}
if ($rut_error == '' and $first_name_error == '' and $last_name_error == '' and $email_error == '' and $address_error == '')
{
//echo "<br>". "Dentro de IF";echo "<br>";
require_once('mysqli_connect.php');
$query = "INSERT INTO students (rut, dv, first_name, last_name, email, address) VALUES (?,?,?,?,?,?)";
$stmt = mysqli_prepare($dbc, $query);
mysqli_stmt_bind_param($stmt, "ssssss", $rut, $dv, $first_name, $last_name, $email, $address);
mysqli_stmt_execute($stmt);
$affected_rows = mysqli_stmt_affected_rows($stmt);
echo 'affected_rows=<' . $affected_rows . '>';
if($affected_rows == 1)
{
$rut = $dv = $first_name = $last_name = $email = $address = '';
echo "<br>"."Client Entered";
mysqli_stmt_close($stmt);
mysqli_close($dbc);
}
else
{
echo 'Error Occurred<br />';
echo mysqli_error();
mysqli_stmt_close($stmt);
mysqli_close($dbc);
}
}
}
function test_input($data)
{
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
getStudentInfo.php
<a href="addStudent.php">Add Client</a>
<?php
// Get a connection for the database
require_once('mysqli_connect.php');
// Create a query for the database
$query = "SELECT serie, rut, dv, first_name, last_name, email, address FROM students ORDER BY serie desc";
// Get a response from the database by sending the connection
// and the query
$response = @mysqli_query($dbc, $query);
// If the query executed properly proceed
if($response)
{
echo '<table align="left" cellspacing="5" cellpadding="8">
<tr><td align="left"><b>Serie </b></td>
<td align="left"><b>Rut </b></td>
<td align="left"><b>Dígito Verificador </b></td>
<td align="left"><b>Primer Nombre </b></td>
<td align="left"><b>Segundo Nombre </b></td>
<td align="left"><b>Email </b></td>
<td align="left"><b>Dirección </b></td>
</tr>';
// mysqli_fetch_array will return a row of data from the query
// until no further data is available
while($row = mysqli_fetch_array($response))
{
echo '<tr><td align="left">' . $row['serie'] . '</td>
<td align="left">' . $row['rut'] . '</td>
<td align="left">' . $row['dv'] . '</dv>
<td align="left">' . $row['first_name'] . '</td>
<td align="left">' . $row['last_name'] . '</td>
<td align="left">' . $row['email'] . '</td>
<td align="left">' . $row['address'] . '</td>'
;
echo '</tr>';
}
echo '</table>';
}
else
{
echo "Couldn't issue database query<br />";
echo mysqli_error($dbc);
}
// Close connection to the database
mysqli_close($dbc);
?>
mysqli_connect.php
<?php
// Defined as constants so that they can't be changed
DEFINE ('DB_USER', 'studentweb');
DEFINE ('DB_PASSWORD', '123');
DEFINE ('DB_HOST', 'localhost');
DEFINE ('DB_NAME', 'dbTest');
// $dbc will contain a resource link to the database
// @ keeps the error from showing in the browser
$dbc = @mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME)
OR die('Could not connect to MySQL: ' . mysqli_connect_error());
//echo "Connected...\n\n";
?>
您可以通过 javascript 完成。
您放置了一个在页面完全加载后即可运行的脚本。
该脚本将检查每个 <span class="error"> 的内容。如果找到非空的，则将焦点放在它上面。
在你的html中：
<body>
...
<script type="text/javascript">
window.onload = function(){
var errors = document.querySelectorAll('.error');
for(var i = 0, l = errors.length; i < l; i++){
var error = errors[i],
shouldForcus = error.textContent.trim().length !== 0;
if(shouldFocus){
var input = error.parentNode.querySelector('input');
input.focus();
break;
}
}
}
</script>
</body>