带变量参数的查询仅采用第一个
我尝试回显 foreach 循环 ant 中的所有变量参数,它有效,但是当我键入查询时,它仅在第一个参数上完成
function SelectDB($Table,$Stm,$Value,...$Selectors){
global $conn;
foreach($Selectors as $Selector){
//That works and echo all Selectors
echo $Selector;
}
}
function SelectDB($Table,$Stm,$Value,...$Selectors){
global $conn;
foreach($Selectors as $Selector){
//Only First Selector is executed in Query
$Query = $conn->prepare("SELECT $Selector FROM $Table WHERE $Stm = ?");
$Query->execute(array($Value));
$Fetch = $Query->fetch();
return $Fetch;
}
}
$S = SelectDB("attended","Id",1,"Id","s","Date","TeacherId");
echo $S['TeacherId']; //Undefined Index
echo $S['Id']; //echo The Id
我想对每个选择器执行查询
最佳答案
您在循环中使用return
语句,因此它将在第一次迭代时返回。
使用缓冲区存储数据并返回:
function SelectDB($Table,$Stm,$Value,...$Selectors) {
global $conn;
$result = [];
foreach($Selectors as $Selector) {
//Only First Selector is executed in Query
$Query = $conn->prepare("SELECT $Selector FROM $Table WHERE $Stm = ?");
$Query->execute(array($Value));
// push fetch to result
$result []= $Query->fetch();
}
return $result;
}
关于php - 如何在变量参数函数中使用查询?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56413419/