Question

我试图用数组填充查询。据我所知，我可以使用函数foreach();显示数组，但我无法将其放入mysql查询中我试图做这样的事情：

<?php
$arr = array("arr_1", "arr_2", "arr_3", "arr_4");

$query = mysql_query("SELECT * FROM users WHERE user = '1'".
foreach($arr as $arr) {
    echo "AND user = '".$arr++."'";
}
." ORDER BY id";
?>

脚本必须将其显示为：
$query = mysql_query("SELECT * FROM users WHERE user = '1' AND user = 'arr_1' AND user = 'arr_2' AND user = 'arr_3' AND user = 'arr_4'");

但是这不起作用，因为你不能将foreach()放在mysql_query();中所以我需要的是执行相同操作的脚本（在查询字符串中显示数组）

感谢。

Answer 1

如果要从数组中添加多个条件，请执行连接而不是echo

<?php
$arr = array("arr_1", "arr_2", "arr_3", "arr_4");

$query = mysql_query("SELECT * FROM users WHERE user = '1'";
foreach($arr as $id) {
    $query .= "AND user = '".$id."'";
}
$query .= " ORDER BY id";
?>

Answer 2

不是最好的解决方案，而是替代方案：

$arr = array("arr_1", "arr_2", "arr_3", "arr_4");

$arr_string="'".implode("','", $arr)."'"; // surround values in quotes

$query = mysql_query("SELECT * FROM users WHERE user IN (".$arr_string.") ORDER BY id";

PHP /在查询中插入foreach

2 个答案: