php - 分解字符串并检查数据库是否有重复

Question

如何获取一个字符串business, jquery, css和explode该字符串并检查 mySQL 数据库以查看每个单词是否已经在数据库条目中？

谢谢，鼓手392

Answer 1

$string = "business, jquery, css";
$exploded = explode(",", $string);

$result = /* database select query */

foreach ($exploded as $value) {
    // $value contains the value being processed
    // compare $result to $value and do what's needed

}

PHP 手册：explode()

希望这能让您了解您需要做什么。

编辑：感谢 Chris 建议先进行数据库查询

Answer 2

explode使用带有“，”分隔符的PHP函数，分配给一个新的数组变量。

我会改进上一个答案，我觉得在 foreach 循环之外使用 SELECT 查询会更好。然后您将避免执行相同的查询 3 次。

$result = /* database select query */
foreach ($exploded as $value) {
    // compare $result to $value and do what's needed
}

Answer 3

$conn = mysql_connect("localhost", "mysql_user", "mysql_password");
mysql_select_db("database", $conn);

$string  = "business, query, css";
$array = explode(", ", $string);

foreach($array as $str){

    $result = mysql_query("SELECT * FROM tableName WHERE columnName='$str'", $conn);
    $num_rows = mysql_num_rows($result);

    if($num_rows > 0)
        //found
    else
        //not found
}