我有一个包含3行的表。我试图遍历所有行,但我没有获得正确的行数。
我的代码如下:
$result1_prepare = $DB->prepare("SELECT * FROM table");
$result1_prepare->execute();
$num = $result1_prepare->fetchColumn();
$result1 = $result1_prepare->fetchAll();
echo $num; //OUTPUT 3
echo count($result1); //OUTPUT 2
if($num > 0){
foreach ($result1 as $x => $row) {
//LOOPING only 2 times, 1 row is not showing
}
}
fetchAll()函数只返回2行。怎么样?
答案 0 :(得分:5)
你的代码与你的言论相矛盾。很可能你在fetchAll之前调用fetchColumn - 所以,fetchColumn从结果集中抢夺一行,只留下两行用于fetchAll。
无论如何,你不需要这些
$stm = $DB->prepare("SELECT * table");
$stm->execute();
$data = $stm->fetchAll();
foreach ($data as $x => $row) {
//LOOPING only if there was data returned. no need to check the number
}