PHP：foreach循环将数组的值分配给连接的字符串和变量

Question

我想将数组的值分配给带有变量的字符串：

    $my_array_values = array("apple", "orange", "cellular", "box");

//my function
function my_function ($my_array_values, $string) {
foreach ($my_array_values as $my_array_value) {
$string_query = $string;
 echo $string_query . "<br>";
}
}

//string to loop the variable inside the foreach
$string_variable = "SELECT login FROM table WHERE login = '" . $my_array_value . "'";
my_function ($my_array_values, $string_variable);

如果我回显它，结果是这样的（不取变量的数组值）：

    SELECT login FROM table WHERE login = ''
SELECT login FROM table WHERE login = ''
SELECT login FROM table WHERE login = ''
SELECT login FROM table WHERE login = ''

结果应该是这样的：

    SELECT login FROM table WHERE login = 'apple'
SELECT login FROM table WHERE login = 'orange'
SELECT login FROM table WHERE login = 'cellular'
SELECT login FROM table WHERE login = 'box'

我该怎么做？ 亲切的问候

Answer 1

你想要达到什么目的？ MySQL IN 函数查找值“IN”一个子集或其他信息池。

$query= "SELECT login FROM table WHERE login IN ({implode(',', $my_array_values)})";

这会比一遍又一遍地循环更容易吗？

Answer 2

正确的做法是这样的：

$my_array_values = array("apple", "orange", "cellular", "box");

//my function
function my_function ($my_array_values, $string) {
  foreach ($my_array_values as $my_array_value) {
    $string_query = $string . $my_array_value . "'";
     echo $string_query . "<br>";
  }
}

//string to loop the variable inside the foreach
$string_variable = "SELECT login FROM table WHERE login = '" ;
my_function ($my_array_values, $string_variable);

Answer 3

无需在您的函数中创建额外的变量。简单地回显所传递的内容以及从传递的数组中提取的值。

$my_array_values = array("apple", "orange", "cellular", "box");

//my function
function my_function ($my_array_values, $string) {

    foreach ($my_array_values as $my_array_value) {
        echo $string . $my_array_value . "'<br>";
    }

}  // end of my_function

//string to loop the variable inside the foreach
$string_variable = "SELECT login FROM table WHERE login = '";
my_function ($my_array_values, $string_variable);