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Posted by Amer Neely on 11/13/06 04:06
Jerry Stuckle wrote:
> Amer Neely wrote:
>> Jerry Stuckle wrote:
>>
>>> Amer Neely wrote:
>>>
>>>> Jerry Stuckle wrote:
>>>>
>>>>> Amer Neely wrote:
>>>>>
>>>>>> flamer die.spam@hotmail.com wrote:
>>>>>>
>>>>>>> Amer Neely wrote:
>>>>>>>
>>>>>>>> I've got a dynamically built form with checkboxes for each
>>>>>>>> element ( a
>>>>>>>> list of file names in a directory). I need to grab only those
>>>>>>>> checkboxes
>>>>>>>> that are checked, so I can then delete those files.
>>>>>>>>
>>>>>>>> Does each checkbox name have to be unique? I was hoping to just
>>>>>>>> group
>>>>>>>> them under one name, and select from that array.
>>>>>>>>
>>>>>>>> PHP is not my native language - I'm coming at this from Perl, so
>>>>>>>> bear
>>>>>>>> with me, things are a little different in that country.
>>>>>>>>
>>>>>>>> I've tried:
>>>>>>>> foreach ($_REQUEST as $field => $value)
>>>>>>>> {
>>>>>>>> echo "$field = $value<br>";
>>>>>>>> }
>>>>>>>> but that just grabs the last entry in the group.
>>>>>>>>
>>>>>>>> The line in question is:
>>>>>>>> <input type="checkbox" name="DeleteThis" value="<?php
>>>>>>>> echo("$allfiles[$i]")?>"> <?php echo("$allfiles[$i]")?><br>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> in html, if your checkbox is called "blah123" then when its
>>>>>>> checked it
>>>>>>> will have the variable name of blah123 with a value of blah123,
>>>>>>> if it
>>>>>>> is unchecked then blah123==null. the easy way is:
>>>>>>>
>>>>>>> if (!empty($_POST['blah123'])) { do stuff }
>>>>>>>
>>>>>>> Flamer.
>>>>>>>
>>>>>>
>>>>>> Hmmm. OK, so I will need to also walk through each of the new
>>>>>> input names, and check them with the 'empty' function. I'll work
>>>>>> on that. Thanks.
>>>>>>
>>>>>>
>>>>>
>>>>> Amer,
>>>>>
>>>>> No. It's much easier than that. Have all the checkboxes names the
>>>>> same, with square brackets ( "[]" ) following. The you will be
>>>>> able to use an array on the PHP side, i.e.
>>>>>
>>>>>
>>>>> <input type="checkbox" name="DeleteThis[]" value="<?php
>>>>> echo("$allfiles[$i]")?>"> <?php echo("$allfiles[$i]")?><br>>
>>>>>
>>>>>
>>>>> To process the input, all you need is:
>>>>>
>>>>> foreach ($_POST['DeleteThis'] as $delfile) {
>>>>> // Validate the filename is OK here
>>>>> unlink $delfile;
>>>>> }
>>>>>
>>>>> This will work whether the checkbox is set via a mouse click or
>>>>> javascript.
>>>>>
>>>>> Of course, you will want to validate your filenames. That part I
>>>>> left out because I have no idea what the criteria is.
>>>>>
>>>>
>>>> OK, I have your code inserted, but it gives me an error when I use
>>>> my 'Select All' JS:
>>>>
>>>> Warning: Invalid argument supplied for foreach() in show_spam4.php
>>>> on line 116
>>>>
>>>> If I click any box with the mouse it returns 'on' for the output.
>>>>
>>>> [116] foreach ($_POST['DeleteThis'] as $value)
>>>> {
>>>> echo "$value<br>";
>>>> }
>>>>
>>>
>>> Amer,
>>>
>>> I didn't mean for that to be the only code. Rather it was a guide to
>>> get you going in the right direction.
>>>
>>> The invalid argument is probably because none of the checkboxes are
>>> checked, so you're not getting anything in your PHP code. To make
>>> sure you're getting good information, check out isset() and isarray()
>>> functions.
>>>
>>
>> :) Sorry, I'm new with PHP so everything is literal. But as I
>> mentioned, if I check all the boxes with JS, and submit the form, it
>> throws that error. I'm going to do some reading and see what I can
>> come up with. Thanks for the input and direction so far.
>>
>
> I would suggest your javascript isn't doing it's job. When I check
> boxes with js the do appear in PHP.
>
That isn't the problem - they appear just fine in the page. I can toggle
them off and on all night.
It's only when the page is submitted that the values don't seem to be
getting through.
--
Amer Neely
w: www.softouch.on.ca/
b: www.softouch.on.ca/blog/
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