I use PHP to get radio button values from an HTML page. My HTML looks like this:
<input type="radio" name="1.1" value="yes">
<input type="radio" name="1.1" value="no">
<input type="radio" name="1" value="yes">
<input type="radio" name="1" value="no">
The result is that $_POST['1'] returns a value, but $_POST['1.1'] returns nothing. I checked the HTML 4 specifications, say value for the name attribute only starts with a letter, but 1 is not a letter. How come it gets returned while 1.1 does not? Or is there some other magic happening here? I use the latest version of Chrome.
By HTML rules, the name attribute may have any value: it is declared with CDATA type. Do not confuse this attribute with the references to attributes declared as having NAME type. See 17.4 The INPUT element, name = cdata [CI].
In the use of $POST[...] in PHP, you need to note this PHP rule: “Dots and spaces in variable names are converted to underscores. For example <input name="a.b" /> becomes $_REQUEST["a_b"].” See Variables From External Sources.
So $_POST['1'] should work as is and does work, but instead of $_POST['1.1'] you need to write $_POST['1_1'].
Try substituting the period for something else like a hyphen. In both the form and the PHP code. Periods are generally used for a . in the extension name.
When it comes to key names for parameters in either GET or POST headers, you want to only use alphanumeric characters, with some special characters generally. Such as hyphens, underscores, etc. You can always do a URL encode if you need to as well.
You should name your input items with text, not numbers. They should not contain any characters such as ., ,, !, and ?. This can cause problems. For more information submitting the data, go to PHP and HTML Radio Buttons
Related
For first validation of an input in HTML5 I want to use the pattern attribute.
What I have so far is:
<INPUT name="firstname" type="text" pattern="[A-Za-z]{2,}" title="2 more characters">
How can I include names that contain other UTF-88 characters but no special signs like question marks, commas and so on?
I think its clear what I want. The user should be able to type only valid first names. That includes "ü", "ñ" and many others.
I'm a newbie at php.
HTML form is capturing data and mailing it to user via php.
I am trying to make this field have a default value of "ALAA-" and then only permit 6 numbers after "ALAA-". I believe I need the REGex for this but I can't figure out the code. thank you!
<div class="form-group">
<label for="form_moms_alaa_registration">Doodle Mom's ALAA Number *11
digits</label>
<input id="form_moms_alaa_registration" type="text" pattern=""
default="ALAA-123456" tabindex="5" value="ALAA-"
name="inputmomsalaaregistration" class="form-control"
placeholder="ALAA-######" data-error="Doodle Moms ALAA registration
should have 6 numbers. It is a required field." required>
<div class="help-block with-errors"></div>
</div>
While sending your client-side HTML form PHP will get the values sent with the tag how the post method , but first I suggest using a JQuery script to validate the upload data see more information to get values in HTML attributes:
help about get attribute value
For the server side, PHP manipulates variables that you can treat this value using regex:
preg_match('/ALAA-[0-9]{6}/', $_POST['YOURFIELD'], $matches);
Here is the regex you need
pattern="ALAA-\d{6}"
You could also write it as:
pattern="ALAA-[0-9]{6}"
I don't think either is more correct than the other, but some people might have opinions about which is more readable.
\d means match any digit. [0-9] means match any character in the range of 0-9 so that is effectively the same thing as \d
The {6} means match exactly 6 repetitions of the preceding character
I need to create a registration form in HTML which has a password input with the following constraints:
Is a mandatory field, should be validated. Minimum of 7 characters. Should have at least one special character and one number. Do not use java script, use HTML 5 features.
I have written the following code to for the above input:
<input type="text" name="password" pattern="(?=.*\d)(?=.*[\W_]).{7,}" required>
I need to submit this code as part of an assignment and I get the error:
Correct HTML Component with the name 'password' must be used with appropriate constraints
which means I am not using the correct attributs.
What changes should I make to the pattern attribute?
This code works perfectly with validation message
<p>Password: <input type="password" name="pw" pattern="(?=.*\d)(?=.*[\W_]).{7,}" title="Minimum of 7 characters. Should have at least one special character and one number."></p>
try it here :
https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_input_pattern3
I think this will work.
Password:<input type="password" name="pw" pattern="^(?=.*?[a-z])(?=.*?[0-9])(?=.*?[#?!#$%^&*-]).{7,}$" title="Minimum of 7 characters. Should have at least one special character and one number and one UpperCase Letter.">
Pattern attribute will also use a Regular Expression to validate your form-data.So for more results you can also search for Regular Expression
I saw this on a question recently.
<input type="radio" mess="whats up" name="q1" value="A" class="correct"/>
I can't get what the mess attribute do, and I couldn't see any result on the internet. So what is the mess attribute for?
It can be called as custom attributes intended to store a piece of information (purely for developer puropse)but it not advisable.
Instead you can go for HTML5 custom data attribute like
data-mess="whats up"
It can be easily accessed with .data() in jQuery.
<input type="radio" data-mess="whats up" name="q1" value="A" class="correct"/>
See
$('.correct').data('mess') // to getch the value
$('.correct').data('mess', 'some value') //to update the value
FYI:*custom data-** is purely validated with w3c validator. Whereas not with yours.
There is no mess attribute, in the question he just used it to attr and get the value through JQuery.
For example:
checked = $('input:checked').attr('mess'); sets checked to whatever the checked input had on the 'mess attribute', as seen in the question.
Another example:
$('#BobDiv').attr('txt'); will return 'Bob' if your HTML is <div id = 'BobDiv' txt = 'Bob' />
As seen here, you have to amend it in your !DOCTYPE declaration, though.
It's just a way to store arbitrary data in the tag. It does whatever the programmer intends it to do. Some people prefer to add custom attributes via data-foo, others prefer this syntax.
I'm trying to put some data in a hidden form field for a POST. But the field is showing up on my Web page. There are no styles or style sheet. Here's how the fields are defined. Any ideas?
<form action="GetUserPics.php" method="post">
<input type=”hidden” name=”picIndex” value="WHAT?">
<input type="submit" value="previous">
</form>
You are using non-standard quotation marks for your attributes on that field. HTML is interpreting those quotes as part of the attribute's value, as in:
<input type="”hidden”" name="”picIndex”" value="WHAT?">
Since ”hidden” is not a valid input type, it's reverting to text.
Because you're not using ASCII quotes, you're using some sort of weird slanty quotes that the HTML is trying to use as the type (and thus it will fall back to text). Interestingly, you're not using them to print the value, which incidentally hides your mistake.
<input type=”hidden” name=”picIndex” value="WHAT?">
Those are not regular double quotes. Try
<input type="hidden" name="picIndex" value="WHAT?">
Can you replace your hidden type input with this:
<input type="hidden" name="picIndex" value="WHAT?"/>