我正在使用表单输入,并尝试将LIKE
关键字与%
修饰符一起传递到sql select查询中,并且都在pdo准备好的语句中,而且我不知道从哪里开始调试。这是代码:
if (isset($_POST["submit"])) {
$search_string = "%".$_POST["search"]."%";
$query = "SELECT * FROM posts WHERE post_tags LIKE :a";
$stmt = $connect->link->prepare($query);
$stmt->bindValue(":a",$search_string);
$stmt->execute();
while($row = $stmt->fetchall()) {
echo $row["post_tags"];
}
}
我遇到以下错误:
注意:未定义索引:C:\ wamp64 \ www \ cms \ CMS_TEMPLATE \ includes \ sidebar.php在第18行的post_tags
问题是我使用的是fetchall而不是fetch
if(isset($_POST["submit"])){
$search_string = "%".$_POST["search"]."%";
;
$query = "SELECT * FROM posts WHERE post_tags LIKE :a";
$stmt = $connect->link->prepare($query);
$stmt->bindValue(":a",$search_string);
$stmt->execute();
$numrows = $stmt->num_rows();
echo $numrows;
while($row = $stmt->fetch()){
echo $row["post_tags"];
}
}