我正在尝试找到一种方法来检索从文本文件中存储的数据，特别是人们从下面的表单中提交的输入日期。然后查找日期的重复项（如果有的话），如果已经两次输入日期，我想使用“if”函数来禁用该日期，以便人们不再提交日期。
这是我的完整代码：
<?php
$path = 'bp.txt';
$nextmonth = date('M Y', strtotime('+1 month'));
if (isset($_POST['field1']) && isset($_POST['field2']) && isset($_POST['field3'])) {
$name = $_POST['field1'];
$date = $_POST['field2'];
$message = $_POST['field3'];
$string = $name.' - '.$date.' - '.$message."\n\r";
$fh = fopen($path,"a+") or die("Unable to open file!");
fwrite($fh,$string); // Write information to the file
fclose($fh); // Close the file
}
//This code is for required fields. Not perfect, but works for the time being
$nameErr = $dateErr = "";
$name = $date = "";
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["field1"])) {
$nameErr = "<font color=\"red\">Name(s) required</font>";
}
if (empty($_POST["field2"])) {
$dateErr = "<font color=\"red\">Date(s) required</font>";
}
}
// This code is to prune the text file that saves our previous data
if(isset($_GET['delete']))
{
// unlink(__FILE__);
file_put_contents($path, "");
}
?>
<html lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta charset="utf-8">
<title>Tii Cup Time Of Request Form</title>
</head>
<body>
<!-- Special version of Bootstrap that is isolated to content wrapped in .bootstrap-iso -->
<link rel="stylesheet" href="https://formden.com/static/cdn/bootstrap-iso.css" />
<!--Font Awesome (added because you use icons in your prepend/append)-->
<link rel="stylesheet" href="https://formden.com/static/cdn/font-awesome/4.4.0/css/font-awesome.min.css" />
<!-- Inline CSS based on choices in "Settings" tab -->
<style>
.bootstrap-iso .formden_header h2, .bootstrap-iso .formden_header p, .bootstrap-iso form{
font-family: Arial, Helvetica, sans-serif; color: black}
.bootstrap-iso form button, .bootstrap-iso form button:hover{
color: white !important;} .asteriskField{color: red;}
.error {color: #FF0000;}
#wrapper form { display: none; }
</style>
<div class="bootstrap-iso">
<div class="container-fluid">
<div class="row">
<form action="#" method="post" id="textarea" class="form-horizontal">
Time Off Requests for <?php echo $nextmonth; ?><br>
Name: <input type="text" name="field1"><span class="error">* <?php echo $nameErr;?></span><br>
Date(s): <input type="text" name="field2" id="date"><span class="error">* <?php echo $dateErr;?></span><br>
Additional Notes: <textarea name="field3" form="textarea"></textarea><br>
<input name="submit" type="submit" value="Submit">
<!-- <button>Reload</button> -->
</form>
</div>
</div>
</div>
<!-- Include jQuery -->
<script type="text/javascript" src="https://code.jquery.com/jquery-1.11.3.min.js"></script>
<!-- Include Date Range Picker -->
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.4.1/js/bootstrap-datepicker.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.4.1/css/bootstrap-datepicker3.css"/>
<script>
$(document).ready(function(){
var date_input=$('input[name="field2"]'); //our date input has the name "field2"
var container=$('.bootstrap-iso form').length>0 ? $('.bootstrap-iso form').parent() : "body";
date_input.datepicker({
format: 'dd',
container: container,
todayHighlight: true,
multidate: true,
multidateSeparator: ", ",
})
})
</script>
<table width="100%"><tr>
<td width="30%">Name(s)</td>
<td width="30%">Date(s)</td>
<td width="40%">Notes</td>
<?php
$file = fopen($path, "r") or die("Unable to open file!");
while (!feof($file)){
$data = fgets($file);
list($names, $dates, $messages) = array_pad(explode(' - ', $data, 3), 3, null);
?>
<tr>
<td width="30%"><?=$names ?></td>
<td width="30%"><?=$dates ?></td>
<td width="40%"><?=$messages ?></td>
</tr>
<?php
}
fclose($file);
?>
</table>
<hr>
<h3><a font="red" href="?delete=1">Erase Data!</a></h3>
</body>
</html>