Re: [PHP] Re: $_POST variable
On 3/11/2011 2:43 PM, Geoff Lane wrote:
[snip]
You could use foreach to iterate through the post variables until you
encounter a match:
foreach ($_POST as $key => $value){
if (substr($key, 0, 6) == "radio_") {
$buttonName = $key;
$buttonValue = 4value;
break 2;
}
}
I haven't tried the above code, but I hope someone will correct my
efforts if I'm wrong.
ok, now I am very new to php, so if i got this wrong be nice.
It APPEARS TO ME that you are setting a variable called buttonName
to the extracted value stored in $key for each name in the post
submission, and a variable named buttonValue for the item's value.
THEM, you do the same thing again to the same destination variables
for the next name/value pair, and so-on until they list of
name/value pairs is exhausted. IF this understanding is correct,
only the LAST name/value pair will emerge from the process intact;
prior values will be obliterated. Would they not be better to append
them to a single dimensioned array, which starts life as a null
array? If I am getting this wrong, please administer wet mackerel
therapy to my tired head and explain the facts.
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Largo Florida
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Re: [PHP] Re: $_POST variable
On 03/11/2011 02:33 PM, Jim Lucas wrote:
> On 3/11/2011 12:03 PM, Shawn McKenzie wrote:
>> On 03/11/2011 01:28 PM, Danny wrote:
>>> Hi guys,
>>>
>>> I have a form that has a long list of radio-bottons inside of it. The
>>> radio-buttons are dynamically created via php and MySQL.
>>>
>>> Here is an example of one of the radio buttons:
>>>
>>> "
>>> value="0">
>>> "
>>> value="1">
>>>
>>> Now, when I submit this form to another page for processing, how would I
>>> "catch"
>>> the above radio-button's $_POST name since I do not know the name, only
>>> that it
>>> starts with "radio_" ?
>>>
>>> Thank You
>>>
>>> Danny
>>
>> The most common and flexible way to do this sort of thing is to use
>> arrays instead:
>>
>> > value="0">
>> > value="1">
>>
>>
>> Then:
>>
>> foreach($_POST['radio'] as $key => $value) {
>>echo "radio for $key is $value";
>> }
>
> Your example would be good if the OP wanted checkbox'es. But with radio
> buttons, the whole point (most of the time) is to have the form only allow you
> to have one of the radio input fields selected at any given time. How you
> showed it, it would not see the uniqueness of the radio button names, and
> therefor allow more than one of the radio input fields to be selected at a
> time.
One radio button of the same name selected at a time yes. From the OP's
code of two radios, one with value 0 and one with value 1, I assumed
these were to be a pair with the same name with only one able to be
successful. This extends to arrays as well:
This works as expected, the same as the code I posted.
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http://www.spidean.com
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Re: [PHP] Re: $_POST variable
On 3/11/2011 12:03 PM, Shawn McKenzie wrote:
> On 03/11/2011 01:28 PM, Danny wrote:
>> Hi guys,
>>
>> I have a form that has a long list of radio-bottons inside of it. The
>> radio-buttons are dynamically created via php and MySQL.
>>
>> Here is an example of one of the radio buttons:
>>
>> "
>> value="0">
>> "
>> value="1">
>>
>> Now, when I submit this form to another page for processing, how would I
>> "catch"
>> the above radio-button's $_POST name since I do not know the name, only that
>> it
>> starts with "radio_" ?
>>
>> Thank You
>>
>> Danny
>
> The most common and flexible way to do this sort of thing is to use
> arrays instead:
>
> value="0">
> value="1">
>
>
> Then:
>
> foreach($_POST['radio'] as $key => $value) {
>echo "radio for $key is $value";
> }
Your example would be good if the OP wanted checkbox'es. But with radio
buttons, the whole point (most of the time) is to have the form only allow you
to have one of the radio input fields selected at any given time. How you
showed it, it would not see the uniqueness of the radio button names, and
therefor allow more than one of the radio input fields to be selected at a time.
I would try something like this:
As long as this is correct:
Zero
One
Then I would do the following:
foreach ($_POST as $k => $v) {
if ( strpos(trim($k), 'radio_') === 0 ) {
echo $k.' is a match, and it\'s value is '.$v.'.'.PHP_EOL;
}
}
Jim Lucas
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Re: [PHP] Re: $_POST variable
You could use foreach to iterate through the post variables until you
encounter a match:
foreach ($_POST as $key => $value){
if (substr($key, 0, 6) == "radio_") {
$buttonName = $key;
$buttonValue = 4value;
break 2;
}
}
I haven't tried the above code, but I hope someone will correct my
efforts if I'm wrong.
given your code example -> 'break 2;' -- s/b just 'break;' ... 'break
2;' is to exit the outer loop of a nested loop which is not the case here.
Rich
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