将字段留空时的php警告消息 - php warning message when leaving an field empty

php warning message when leaving an field empty

本文关键字：php 警告消息字段 | 更新日期: 2023-09-27

我有这段代码，我想在人们将需求字段留空时制作一个警告消息框。

代码：

if (@ is_array($cfields)) {
    foreach ($cfields as $cf) {
        if (intval($cf['required']) == 1) {
            if ($cf['type'] == "text" || $cf['type'] == "textarea" || $cf['type'] == "date") {
            ?>
            if(!vrvar.vrcf<?php echo $cf['id']; ?>.value.match(/'S/)) {
                document.getElementById('vrcf<?php echo $cf['id']; ?>').style.color='#ff0000';
                return false;
            }else {
                document.getElementById('vrcf<?php echo $cf['id']; ?>').style.color='';
            }
            <?php
            }elseif ($cf['type'] == "select") {
            ?>
            if(!vrvar.vrcf<?php echo $cf['id']; ?>.value.match(/'S/)) {
                document.getElementById('vrcf<?php echo $cf['id']; ?>').style.color='#ff0000';
                return false;
            }else {
                document.getElementById('vrcf<?php echo $cf['id']; ?>').style.color='';
            }
            <?php
            } elseif ($cf['type'] == "checkbox") {
                //checkbox
            ?>
            if(vrvar.vrcf<?php echo $cf['id']; ?>.checked) {
                document.getElementById('vrcf<?php echo $cf['id']; ?>').style.color='';
            }else {
                document.getElementById('vrcf<?php echo $cf['id']; ?>').style.color='#ff0000';
                return false;
            }
            <?php
            }
        }
    }
}
?>

现在，当字段为空时，文本仅变为红色。

有什么想法吗？：）

添加警报消息，如下所示[请参阅第三行]

if(!vrvar.vrcf<?php echo $cf['id']; ?>.value.match(/'S/)) {
            document.getElementById('vrcf<?php echo $cf['id']; ?>').style.color='#ff0000';
            alert('Please dont leave the field blank');// I have added here
            return false;
            }else {
            document.getElementById('vrcf<?php echo $cf['id']; ?>').style.color='';
            }