PHP trim 不工作

Question

我正在尝试使用 trim 摆脱我的 sql statemen 的尾随逗号，但它似乎不起作用

if(isset($_POST['report'])){
    //====
    $sql = 'INSERT INTO weekly_repo ( hospnme, disease, week, under5, above5, dat) VALUES ';
    $week = intval($_POST['current_week']);
    $diseases = $_POST['diseases'];

    foreach($diseases as $disease){

        $sql .= ' ( "' . filterString($_POST['hospital']). '", "' . filterString($disease['disease']) . '", ' . $week . ', ' . intval($disease['under_5']) . ', ' . intval($disease['over_5']) . ', NOW()), ';

    }
    $sql = trim($sql, '\,');
    // ended up doing this
    //$sql = substr($sql, 0, strrpos($sql, ',')) . ';';
    $stmt = $conn->query($sql);

}

Answer 1

您不需要转义 \ 逗号。更好的方法可能是构造一个数组，然后 implode():

foreach($diseases as $disease){
    $sql[] = ' ( "' . filterString($_POST['hospital']). '", "' . filterString($disease['disease']) . '", ' . $week . ', ' . intval($disease['under_5']) . ', ' . intval($disease['over_5']) . ', NOW()), ';
}
$sql = implode(',', $sql);

PHP trim 不工作

PHP trim not working

php

trim