Php PDO错误：Can'；t初始化字符集utf8\u常规\u ci
我的web主机上的PHP最近进行了更新，现在我的旧MySQL查询显示了“弃用”错误消息。我需要将mysql_查询代码转换为PDO。以下是我的开始：Php PDO错误：Can'；t初始化字符集utf8\u常规\u ci,php,mysql,pdo,Php,Mysql,Pdo,我的web主机上的PHP最近进行了更新，现在我的旧MySQL查询显示了“弃用”错误消息。我需要将mysql_查询代码转换为PDO。以下是我的开始： <? $con = mysql_connect("localhost", "username", "password"); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("database_name", $con);
<?
$con = mysql_connect("localhost", "username", "password");
if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("database_name", $con);
$result = mysql_query("select * from event_calendar where event_year >= '2017' order by event_datenumber asc")
or die(mysql_error());
while($row = mysql_fetch_array($result)) {
$event_date = $row['event_date'];
$event_month = $row['event_month'];
$event_monthname = $row['event_monthname'];
$event_year = $row['event_year'];
$event_datenumber = $row['event_datenumber'];
$event_starttime = $row['event_starttime'];
$event_location = $row['event_location'];
$event_city = $row['event_city'];
$event_state = $row['event_state'];
$event_directions = $row['event_directions'];
$testmonth = date("F");
$testmonth2 = date("m");
$testdate = date("d");
$testyear = date("Y");
$testdatenumber = $testyear.$testmonth2.$testdate;
?>
<?
if ($testdatenumber <= $event_datenumber){
?>
<p>
<b><? echo $event_monthname.' '.$event_date ?></b> - <? echo $event_starttime ?><br>
<? echo $event_location ?><br>
<? echo $event_city ?>, <? echo $event_state ?><br>
<a href="<? echo $event_directions ?>" target="_blank"><b>Directions</b></a>
</p>
<? } else {} ?>
<? } ?>
<?php
$db = new PDO('mysql:host=localhost;dbname=database_name;charset=utf8mb4', 'username', 'password', array(PDO::ATTR_EMULATE_PREPARES => false,
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));
foreach($db->query('SELECT * FROM event_calendar WHERE event_year >= 2017 ORDER BY event_datenumber ASC') as $row) {
$testmonth = date("F");
$testmonth2 = date("m");
$testdate = date("d");
$testyear = date("Y");
$testdatenumber = $testyear.$testmonth2.$testdate;
if ($testdatenumber <= $row['event_datenumber']) {
echo "<p>";
echo "<u><h4>".$row['event_monthname']." ".$row['event_date'].", ".$row['event_year']."</h4></u>";
echo "<b>What:</b> ".$row['event_title']."<br/>";
echo "<b>Where:</b> ".$row['event_location']." - ".$row['event_address1'].", ".$row['event_city'].", ".$row['event_state']." ".$row['event_zip']."<br/>";
echo "<b>When:</b> ".$row['event_starttime']."<br/>";
echo "<b>When:</b> <a href='".$row['event_directions']."' target='_blank'><b>Click here</b></a>";
echo "</p>";
} else {}
}
?>
<?php
$db = new PDO('mysql:host=localhost;dbname=database_name;charset=utf8mb4', 'username', 'password', array(PDO::ATTR_EMULATE_PREPARES => false,
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));
foreach($db->query('SELECT * FROM event_calendar WHERE event_year >= 2017 ORDER BY event_datenumber ASC') as $row) {
$testmonth = date("F");
$testmonth2 = date("m");
$testdate = date("d");
$testyear = date("Y");
$testdatenumber = $testyear.$testmonth2.$testdate;
if ($testdatenumber <= $row['event_datenumber']) {
echo "<p>";
echo "<u><h4>".$row['event_monthname']." ".$row['event_date'].", ".$row['event_year']."</h4></u>";
echo "<b>What:</b> ".$row['event_title']."<br/>";
echo "<b>Where:</b> ".$row['event_location']." - ".$row['event_address1'].", ".$row['event_city'].", ".$row['event_state']." ".$row['event_zip']."<br/>";
echo "<b>When:</b> ".$row['event_starttime']."<br/>";
echo "<b>When:</b> <a href='".$row['event_directions']."' target='_blank'><b>Click here</b></a>";
echo "</p>";
} else {}
}
?>
ini_set('display_errors', false);
一旦您在当前站点上安装了此功能，从旧数据库扩展迁移出去的任务就不再那么紧迫了。我猜您现在使用的是PHP5.6，它仍然支持
mysql\uUcode>函数，但是您仍然需要准备7.x，因为它们已经被删除了。错误消息很清楚：没有这样的字符集。从来没有
utf8\u general\u ci
是一个排序规则，而正确的字符集名称只是utf8
让我向您推荐我的，这将帮助您避免许多类似的混乱。更新：好的，经过几天的阅读和摸索，我终于想出了一个可行的重写方法。我现在有以下工作：
<?php
$db = new PDO('mysql:host=localhost;dbname=database_name;charset=utf8mb4', 'username', 'password', array(PDO::ATTR_EMULATE_PREPARES => false,
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));
foreach($db->query('SELECT * FROM event_calendar WHERE event_year >= 2017 ORDER BY event_datenumber ASC') as $row) {
$testmonth = date("F");
$testmonth2 = date("m");
$testdate = date("d");
$testyear = date("Y");
$testdatenumber = $testyear.$testmonth2.$testdate;
if ($testdatenumber <= $row['event_datenumber']) {
echo "<p>";
echo "<u><h4>".$row['event_monthname']." ".$row['event_date'].", ".$row['event_year']."</h4></u>";
echo "<b>What:</b> ".$row['event_title']."<br/>";
echo "<b>Where:</b> ".$row['event_location']." - ".$row['event_address1'].", ".$row['event_city'].", ".$row['event_state']." ".$row['event_zip']."<br/>";
echo "<b>When:</b> ".$row['event_starttime']."<br/>";
echo "<b>When:</b> <a href='".$row['event_directions']."' target='_blank'><b>Click here</b></a>";
echo "</p>";
} else {}
}
?>
<?php
$db = new PDO('mysql:host=localhost;dbname=database_name;charset=utf8mb4', 'username', 'password', array(PDO::ATTR_EMULATE_PREPARES => false,
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));
foreach($db->query('SELECT * FROM event_calendar WHERE event_year >= 2017 ORDER BY event_datenumber ASC') as $row) {
$testmonth = date("F");
$testmonth2 = date("m");
$testdate = date("d");
$testyear = date("Y");
$testdatenumber = $testyear.$testmonth2.$testdate;
if ($testdatenumber <= $row['event_datenumber']) {
echo "<p>";
echo "<u><h4>".$row['event_monthname']." ".$row['event_date'].", ".$row['event_year']."</h4></u>";
echo "<b>What:</b> ".$row['event_title']."<br/>";
echo "<b>Where:</b> ".$row['event_location']." - ".$row['event_address1'].", ".$row['event_city'].", ".$row['event_state']." ".$row['event_zip']."<br/>";
echo "<b>When:</b> ".$row['event_starttime']."<br/>";
echo "<b>When:</b> <a href='".$row['event_directions']."' target='_blank'><b>Click here</b></a>";
echo "</p>";
} else {}
}
?>
现在我只希望我能弄清楚如何将结果限制在满足条件的前三行。到目前为止，我已经尝试了几件事，但还没有成功。我想在我找到有用的东西之前，我会重新开始阅读和测试。开始的方法是在互联网上阅读关于pdo的教程，你不能把你的旧代码扔到stackoverflow上，期望有人直接为你转换，如果你自己不启动pdo，你将如何学习它，很明显，你在错误的地方。这个链接可能会帮助你感谢你，于佳奥，至少你很友好，提供了一个信息链接。非常感谢。太好了，你能用代码格式在最后的问题中添加这一点吗？这是一个更加集中的问题。我没有遇到那个错误。值得一提的是你的操作系统和版本。（如果这个问题关闭，基于当前版本，在编辑之后，ping Me，我会考虑重新打开投票）。谢谢你的信息。是的，看起来是PHP5.6.30谢谢。我更改为utf8，现在收到一条拒绝访问的消息。我会看看你的教程。谢谢你的链接。