PHP and HTML Checkboxes using POST
I have a php file which lists all the files in a directory with checkboxes next to each one:
<html
<body>
<P>List of files:</p>
<form action="submitfiles.php" method="post">
<?php
if ($handle = opendir('./files')) {
while (false !== ($file = readdir($handle)))
{
if ($file != "." && $file != "..")
{
$thelist .= '<a href="'.'./files/'.$file.'">'.$file.'</a>';
开发者_开发技巧 $thelist .= '<br>';
$s = '<input type="checkbox" name="'.$file.'" value="yes"/><a href="'.'./files/'.$file.'">'.$file.'</a>';
echo $s;
echo '<br';
}
}
closedir($handle);
}
?>
</body>
<input type="submit" name="formSubmit" value="Submit"/>
</form>
</html>
Then, I have a submitfiles.php, which loops through all the files, and gets the $_POST values for each checkbox.
<?php
if ($handle = opendir('./files')) {
while (false !== ($file = readdir($handle)))
{
if ($file != "." && $file != "..")
{
echo 'Value is ' . $_POST['$file'] . '<br>';
echo $file . '<br>';
}
}
closedir($handle);
}
?>
Even if I check a checkbox though, the line "Value is " in my php file always prints a blank. Meaning, none of the checkboxes are ever given a value. How do I get this working? If I checked a checkbox, I want it to print "Value is yes", but it doesn't.
Okay - there is a slight disconnect in your code...
Here is the checkbox:
<input type="checkbox" name="'.$file.'" value="yes"/>
Here is your attempt to get it:
$_POST['$file']
The name of the checkbox isn't "$file" - it is the value of the variable $file...
So try changing them to...
<input type="checkbox" name="file[]" value="yes"/>
And get them like this...
$FileCheckBoxes = $_POST['file'];
Now $FileCheckBoxes will contain a list of the ones that were checked.
You want to have checkboxes to output an array.
<input type="checkbox" name="assigned_name[]" value="1"> Item 1
<input type="checkbox" name="assigned_name[]" value="2"> Item 2
On the line
echo 'Value is ' . $_POST['$file'] . '<br>';
in submitfiles.php, try not using quotes around $file, like so:
echo 'Value is ' . $_POST[$file] . '<br>';
Using single quotes forces PHP to not evaluate the value of $file. Read up on single quotes at http://www.php.net/manual/en/language.types.string.php#language.types.string.syntax.single
The problem is this line here:
echo 'Value is ' . $_POST['$file'] . '<br>';
Remove the single quotes around the array key (or use double quotes):
echo 'Value is ' . $_POST[$file] . '<br>';
When you use single quotes, the variable $file is being passed as a string. You can read more about why this is true here: http://php.net/string/
加载中,请稍侯......
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