如何查看选中的复选框？

How do I check in PHP whether a checkbox is checked or not?

如何检查PHP是否选中了复选框？

5 个解决方案

#1

If the checkbox is checked, then the checkbox's value will be passed. Otherwise, the field is not passed in the HTTP post.

如果选中该复选框，则将传递复选框的值。否则，该字段不会在HTTP帖子中传递。

if (isset($_POST['mycheckbox'])) {
    echo "checked!";
}

#2

you can check that by either isset() or empty() (its check explicit isset) weather check box is checked or not

您可以通过isset（）或empty（）（检查显式isset）检查天气复选框是否已选中

for example

例如

  <input type='checkbox' name='Mary' value='2' id='checkbox' />

here you can check by

在这里你可以检查

if (isset($_POST['Mary'])) {
    echo "checked!";
}

要么

if (!empty($_POST['Mary'])) {
    echo "checked!";
}

the above will check only one if you want to do for many than you can make an array instead writing separate for all checkbox try like

上面只检查一个，如果你想要做多，你可以做一个数组，而不是为所有复选框写单独尝试

<input type="checkbox" name="formDoor[]" value="A" />Acorn Building<br />
<input type="checkbox" name="formDoor[]" value="B" />Brown Hall<br />
<input type="checkbox" name="formDoor[]" value="C" />Carnegie Complex<br />

php

PHP

  $aDoor = $_POST['formDoor'];
  if(empty($aDoor))
  {
    echo("You didn't select any buildings.");
  }
  else
  {
    $N = count($aDoor);
    echo("You selected $N door(s): ");
    for($i=0; $i < $N; $i++)
    {
      echo htmlspecialchars($aDoor[$i] ). " ";
    }
  }

#3

Try this

尝试这个

<form action="form.php" method="post">
    Do you like *?
    <input type="checkbox" name="like" value="Yes" />
 <input type="submit" name="formSubmit" value="Submit" />
</form>
<?php
    if(isset($_POST['like'])
    {
        echo "You like *.";
    }
    else
    {
        echo "You don't like *.";
    }   
?>

Or this

或这个

<?php
    if(isset($_POST['like']) && 
    $_POST['like'] == 'Yes') 
    {
        echo "You like *.";
    }
    else
    {
        echo "You don't like *.";
    }   
?>

#4

If you don't know which checkboxes your page has (ex: if you are creating them dynamically) you can simply put a hidden field with the same name and 0 value right above the checkbox.

如果您不知道您的页面有哪些复选框（例如：如果您是动态创建它们），您只需在复选框上方放置一个名称相同且值为0的隐藏字段即可。

<input type="hidden" name="foo" value="0" />
<input type="checkbox" name="foo" value="1">

This way you will get 1 or 0 based on whether the checkbox is selected or not.

这样，您将根据是否选中该复选框获得1或0。

#5

I love short hands so:

我爱短手所以：

$isChecked = isset($_POST['myCheckbox']) ? "yes" : "no";

#1