Question

我在PHP中使用for循环，但是没有按预期工作。循环使用自己的验证脚本将表单输出到页面。但是，一旦运行，循环永远不会结束！

for ($noemployments=0; $noemployments < 3; $noemployments++) { 
    if ($noemployments >=9) {
        break 2;
    }

    $noemploymentsErr.$noemployments="";

    if ($_SERVER['REQUEST_METHOD'] == "POST") {
        if (empty($_POST['no_empreturns".$noemployments"'])) {
            $noemploymentsErr.$noemployments = "This is a required field.";
        } else {
            $no_empreturns.$noemployments = test_input($_POST['no_empreturns".$noemployments"']);
            if (!preg_match("/^[a-zA-Z0-9_-]*$/", $no_empreturns.$noemployments)) {
                $noemploymentsErr.$noemployments = "Illegal characters have been entered.";
            }
        }
    }

    print "<label for='no_returns'>Employment Name".$noemployments.":</label>
        <input type='text' id='no_returns' class='form-control' name='no_empreturns".$noemployments."' placeholder='Employment name' maxlength='20'>";
    print "<strong>".$noemploymentsErr.$noemployments."</strong>";

 }

有什么建议吗？

Answer 1

$noemploymentsErr.$noemployments="";

不做你的想法。它每次通过循环设置$noemployments并清空字符串，其值为0和0 < 3。所以循环永远不会结束。

最好使用数组：

$noemploymentsErr[$noemployments] = "";

但如果您以后不再使用此功能，则无需单独保留错误，只需：

$noemploymentsErr = "";

PHP - 循环不按预期运行

1 个答案: