dongzengzai4567 2014-05-14 21:01
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当我使用php提交表单时,如何从清空中停止勾选框输入?

I'm using the following code for a series of check-boxes.
How can I change the code to prevent the checkboxes from emptying when user submits the form.

    <?php
$services = array(
    'Tree Felling',
    'Height Reduction',
    'Crown Thinning',
    'Deadwooding/Ivy Removal',
    'Stump Grinding',
    'Other'
);
foreach ($services as $option) {
?>
 <label><input id="<?= $option ?>" type="checkbox" name="services[]" <?php
    if ($_POST['services'] == $option) {
        echo 'CHECKED';
    }
?> value="<?= $option ?>" /><?= $option ?></label>
<?
}
?>

I tried this - but It didn't work out. Am I on the right lines?

    <?php
$services = array(
    'Tree Felling',
    'Height Reduction',
    'Crown Thinning',
    'Deadwooding/Ivy Removal',
    'Stump Grinding',
    'Other'
);
foreach ($services as $option) {
?>
 <label><input id="<?= $option ?>" type="checkbox" name="services[]" value="<?= $option ?>" /><?= $option ?></label>
<?
}
?>
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2条回答 默认 最新

  • duanniu4106 2014-05-14 21:16
    关注

    You need to check to see if $_POST['services'] is available via isset() (basically that the form's been submitted) and check to see if that service is in the array using in_array(). This worked for me:

    <?php
    $services = array(
    'Tree Felling',
    'Height Reduction',
    'Crown Thinning',
    'Deadwooding/Ivy Removal',
    'Stump Grinding',
    'Other'
    );
    foreach ($services as $option) {
    ?>
    <label><input id="<?= $option ?>" type="checkbox" name="services[]" <?php
        if ( isset($_POST['services']) and in_array($option, $_POST['services']) ) {
        echo 'CHECKED';
        }
    ?> value="<?= $option ?>" /><?= $option ?></label>
    <?
    }
    ?>
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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