PHP显示post变量
我在这里寻求一些帮助和解释 我已经创建了一个HTML表单，其中包含几个输入字段和一些非常基本的PHP验证。我的验证只是检查字段是否有数据，如果没有，则通过显示错误提示用户在字段中输入数据。我的希望是最终发布这些输入，对照数据库检查它们，如果它们不存在，则将它们添加到数据库中。但是，这不是我手头的问题 目前，我的目标是获取我想要发布的字段中的所有输入，并将它们显示在错误显示区域下方的字段中。我本来希望只回显数据，但由于某种原因，并不是所有输入的数据都会出现 在下面代码中的5个输入字段中，4个是基本输入字段，一个是文本区域。如果我在基本输入字段中输入任何内容，则只有最后一个输入将在我的显示区域中回响。如果我在字段1中输入一些内容，并将其余内容留空，则将显示字段1。此外，如果我在文本区域中输入内容，它将始终显示。最后，我的PHP验证似乎不适用于我的textarea类型输入（标记为“note”），如果“note”输入留空，则不会返回错误。有人能解释一下吗：（1）如何修复它，以便所有5个输入都显示在display div中？；（2） 为什么会发生这种情况？；（3） 如果文本区域（标记为“note”）留空，为什么不返回错误 多谢各位PHP显示post变量,php,html,forms,Php,Html,Forms,我在这里寻求一些帮助和解释 我已经创建了一个HTML表单，其中包含几个输入字段和一些非常基本的PHP验证。我的验证只是检查字段是否有数据，如果没有，则通过显示错误提示用户在字段中输入数据。我的希望是最终发布这些输入，对照数据库检查它们，如果它们不存在，则将它们添加到数据库中。但是，这不是我手头的问题 目前，我的目标是获取我想要发布的字段中的所有输入，并将它们显示在错误显示区域下方的字段中。我本来希望只回显数据，但由于某种原因，并不是所有输入的数据都会出现 在下面代码中的5个输入字段中，4个是基本
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<?php
//form validation for general entry form
// define variables and set to empty values
$clientErr = $matterErr = $dateErr = $timeErr = $noteErr= "";
$client = $matter = $date = $time = $note = "";
//on post, check to see if variable is empty. if not empty
//parse it and assign value back to variable name
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$complete = true;
$postArray = [];
if (empty($_POST["client"])) {
$clientErr = "*A client name is required. ";
$complete = false;
}else {
$client = test_input($_POST["client"]);
//$postArray[] = $client;
}
if (empty($_POST["matter"])) {
$matterErr = "*A matter name is required. ";
$complete = false;
}else {
$client = test_input($_POST["matter"]);
}
if (empty($_POST["date"])) {
$dateErr = "*A date is required. ";
$complete = false;
}else {
$client = test_input($_POST["date"]);
}
if (empty($_POST["time"])) {
$timeErr = "*A time entry is required. ";
$complete = false;
}else {
$client = test_input($_POST["time"]);
}
if (empty($_POST["note"])) {
$noteErr = "*A note is required. ";
$complete = false;
} else {
$note = test_input($_POST["note"]);
}
}
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" >
<label for="client">Client:</label>
<input type="text" placeholder = "Enter Client Name" name="client"> *
<label for="matter">Matter:</label>
<input type="text" placeholder = "Enter Matter Name" name="matter"> *
<label for="date">Date:</label>
<input type="text" placeholder = "Enter Date" name="date"> *
<label for="time">Time:</label>
<input type="text" placeholder ="Time to nearest tenth hour" name="time"> *
<label for="note">Note:</label>
<textarea name="note" placeholder ="Enter Any Notes" rows="4" cols="40"></textarea>
<input type="submit" name="submit" value="Submit" class="submitbutton">
</form>
<div class="errorDiv">
<?php
echo $clientErr;
echo $matterErr;
echo $dateErr;
echo $timeErr;
?>
</div>
<div class ="displayDiv">
<?php
echo "<h2>Your Input:</h2>";
echo $client;
echo "<br>";
echo $matter;
echo "<br>";
echo $date;
echo "<br>";
echo $time;
echo "<br>";
echo $note;
?>
</div>
</body>
</html>
文件
您复制并粘贴了else
块，是吗？在每个块中，您将值分配给$client
，从而用每个新的$\u POST
值覆盖它。将其他分配更改为$client
或相应的$time
，然后重试
比如这个
$client = test_input($_POST["date"]);
应该是
$date = test_input($_POST["date"]);
为什么要将所有值赋给同一个$client变量？必须用不同的变量来替换它
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$complete = true;
$postArray = [];
if (empty($_POST["client"])) {
$clientErr = "*A client name is required. ";
$complete = false;
}else {
$client = test_input($_POST["client"]);
//$postArray[] = $client;
}
if (empty($_POST["matter"])) {
$matterErr = "*A matter name is required. ";
$complete = false;
}else {
$matter= test_input($_POST["matter"]);
}
if (empty($_POST["date"])) {
$dateErr = "*A date is required. ";
$complete = false;
}else {
$date= test_input($_POST["date"]);
}
if (empty($_POST["time"])) {
$timeErr = "*A time entry is required. ";
$complete = false;
}else {
$time= test_input($_POST["time"]);
}
if (empty($_POST["note"])) {
$noteErr = "*A note is required. ";
$complete = false;
} else {
$note = test_input($_POST["note"]);
}
文件
我绝对做到了。谢谢你的接球。这回答了问题1和2。你知道为什么3对我来说仍然是个问题吗？让我运行一个测试，我怀疑
总是会提交一个值。您可能需要检查$\u POST['note']！=''
而不是empty（）
。谢谢您的回答是正确的，但是上面的用户发现了这一点，因此我将选择他的答案作为正确答案。谢谢您发现了这一点。这是完整的答案。是的，比我快。：）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<?php
//form validation for general entry form
// define variables and set to empty values
$clientErr = $matterErr = $dateErr = $timeErr = $noteErr= "";
$client = $matter = $date = $time = $note = "";
//on post, check to see if variable is empty. if not empty
//parse it and assign value back to variable name
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$complete = true;
$postArray = [];
if (empty($_POST["client"])) {
$clientErr = "*A client name is required. ";
$complete = false;
}else {
$client = test_input($_POST["client"]);
//$postArray[] = $client;
}
if (empty($_POST["matter"])) {
$matterErr = "*A matter name is required. ";
$complete = false;
}else {
$matter = test_input($_POST["matter"]); //remove $client and assign value to $matter
}
if (empty($_POST["date"])) {
$dateErr = "*A date is required. ";
$complete = false;
}else {
$date = test_input($_POST["date"]); //remove $client and assign value to $date
}
if (empty($_POST["time"])) {
$timeErr = "*A time entry is required. ";
$complete = false;
}else {
$time = test_input($_POST["time"]); //remove $client and assign value to $time
}
if (empty($_POST["note"])) {
$noteErr = "*A note is required. ";
$complete = false;
} else {
$note = test_input($_POST["note"]);
}
}
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" >
<label for="client">Client:</label>
<input type="text" placeholder = "Enter Client Name" name="client"> *
<label for="matter">Matter:</label>
<input type="text" placeholder = "Enter Matter Name" name="matter"> *
<label for="date">Date:</label>
<input type="text" placeholder = "Enter Date" name="date"> *
<label for="time">Time:</label>
<input type="text" placeholder ="Time to nearest tenth hour" name="time"> *
<label for="note">Note:</label>
<textarea name="note" placeholder ="Enter Any Notes" rows="4" cols="40"></textarea>
<input type="submit" name="submit" value="Submit" class="submitbutton">
</form>
<div class="errorDiv">
<?php
echo $clientErr;
echo $matterErr;
echo $dateErr;
echo $timeErr;
echo $noteErr; // echo noteerror here.........
?>
</div>
<div class ="displayDiv">
<?php
echo "<h2>Your Input:</h2>";
echo $client;
echo "<br>";
echo $matter;
echo "<br>";
echo $date;
echo "<br>";
echo $time;
echo "<br>";
echo $note;
?>
</div>
</body>
</html>