如何使用 php 中的 foreach 和条件使用 onclick function 回显按钮？
[英]How to echo button with onclick function using foreach and condition in php?
问题描述
Expect:
预计：
Select data from my SQL. Select 数据来自我的 SQL。 Foreach to echo data and the button. Foreach 回显数据和按钮。 When the data is null, display the "join" button with onclick function.当数据为 null 时，显示“加入”按钮与 onclick function。 When the data is "joined", hide the "join"button with onclick function, display the "result" button with onclick function. When the data is "joined", hide the "join"button with onclick function, display the "result" button with onclick function.
Result:结果：
Cannot hide the "join"button with onclick function, display the "result" button with onclick function.无法用 onclick function 隐藏“加入”按钮，用 onclick ZC1C4DAB50268E178A7 显示“结果”按钮。
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "battle";
try {
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$stmt = $conn->prepare("SELECT * FROM battleRecord Group by id");
$stmt->execute();
$stmt->setFetchMode(PDO::FETCH_ASSOC);
foreach ($stmt->fetchAll() as $row) {
if ($row['participation'] == 'joined') {
$displayJoin = 'none';
$displayResult = 'block';
} else {
$displayJoin = 'block';
$displayResult = 'none';
}
?>
<tr>
<td style='width:150px;border:1px solid black;'>
<p><?php echo $row['id']?></p>
</td>
<td style='width:150px;border:1px solid black;'>
<button style="display:<?php echo $displayJoin ?>" id="joinBattle" onclick="joinBattle(<?php echo htmlspecialchars($row['id']) ?>)">joinbattle</button>
<button style="display:<?php echo $displayResult ?>" id="checkResult" onclick="checkResult(<?php echo htmlspecialchars($row['result']) ?>)">result</button>
</td>
</tr>
<?PHP
}
} catch (PDOException $e) {
echo "Error: " . $e->getMessage();
}
$conn = null;
?>
</body>
</html>
Result and Mysql结果和 Mysql
1 个解决方案
解决方案1
0 已采纳 2021-03-11 02:44:23
You never set $displayJoin to block .您从未将$displayJoin设置为block 。 Use this:用这个：
if ($row['participation'] == 'joined') {
$displayJoin = 'none';
$displayResult = 'block';
} else {
$displayJoin = 'block';
$displayResult = 'none';
}
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