I am processing files that contain HTML markup.
I need to get the selected option from the drop down box. In this case Australia is the selected option ..
<select name="cCountry" id="cCountry" style="width:200" tabindex="5">
<option value="251">Ascension Island</option>
<option selected="selected" value="14">Australia</option>
<option value="13">Austria</option>
Another scenario :
<select name="cBirthYearM" id="cBirthYearM">
<option value="1974">1974</option>
<option value="1975">1975</option>
<option value="1976">1976</option>
<option selected="selected" value="1977">1977</option>
<option value="1978">1978</option>
<option value="1979">1979</option>
In this case '1977" is the value that I need to extract as it's the selected option .
To make it clear I need to get the value from the markup not from user GET/POST input
The value specified in the value part of the option will be in $_GET ['cCountry'] or $_POST ['cCountry'] (depending if you're using GET or POST to submit the form).
It should be simple matter to look up the value from a lookup table or DB query.
EDIT: This question didn't make it clear if you meant how to get the value the user selected when the form is submitted, or how to get the value from the markup. If it's the latter, then you should look at DOMDocument.
If you wish to parse HTML in PHP then the preferred method is the DOM hierarchy of objects, especially DOMDocument. You can use Javascript-like methods of accessing the DOM tree such as getElementById to grab the select control (in this case getElementById ('cCountry')) and then examine its children (the options) to find the selected one and get its attributes.
It can take a little getting used to using the DOM objects but they're far more powerful for parsing and manipulating HTML than regex would be, so they're well worth learning.
http://php.net/manual/en/book.dom.php
http://php.net/manual/en/class.domdocument.php
Related
I am in school for web development, so I clearly don't know a lot yet. I am trying to grab a value from a select, and output it in a paragraph. I know it's about the Browns, but everything else works, but I cannot seem to find anything on StackOverflow, or Google on how to grab the value that works. I get the following error:
Notice: Undefined variable: draft in C:\wamp\www\lab 5\process.php on line 42
This error is in my paragraph, which makes me think I am grabbing the value, but it isn't outputting correctly? I am using a variable to show where I want to output that value in the paragraph.
This is my HTML:
<li><select id="uDraft"
<select>
<option value="Draft Offense">Draft Offense</value>
<option value="Draft Defense">Draft Defense</value>
<option value="Trade them, we can't pick good anyways">Trade them, we can't pick good anyways</value>
</select></li>
This is my process.php code:
if(isset($_GET["uDraft"])){
$draft= $_GET["uDraft"];
}
echo "I want to output **$draft var** as the value they choose so it shows the choice in a paragraph that is pre-written";
All of my other text boxes work, I just cannot seem to get the value from the select, so that I can show what it says in the text, into the paragraph. I also had a select for wins, but gave up when I couldn't figure out how to grab the value. I know I can use radio buttons, but I am trying to learn how to grab the value from the drop down. Any help would be greatly appreciated.
You need to give your dropdown a name:
HTML:
<li>
<select name="uDraft">
<option value="Draft Offense">Draft Offense</option>
<option value="Draft Defense">Draft Defense</option>
<option value="Trade them, we can't pick good anyways">Trade them, we can't pick good anyways</option>
</select>
</li>
PHP:
if(isset($_GET["uDraft"])){
$draft= $_GET["uDraft"];
echo $draft;
}
1st you have simple html errors, closing the select tag early, no name on select and closing the options tags incorrectly. It should be:
<select id="uDraft" name="uDraft">
<option value="Draft Offense">Draft Offense</option>
<option value="Draft Defense">Draft Defense</option>
<option value="Trade them, we can't pick good anyways">Trade them, we can't pick good anyways</option>
</select>
Then in php, you need to handle the case when the page loads, so there is no get data:
if(isset($_GET["uDraft"])){
$draft= $_GET["uDraft"];
}else{
$draft = 'DEFAULT VALUE GOES HERE';
}
echo "I want to output **$draft var** as the value they choose so it shows";
This could be handled with a ternary if as well:
$draft = isset($_GET['uDraft'])? $_GET['uDraft'] : 'DEFAULT';
I have selectbox option list with multiple selection.
<select multiple="MULTIPLE" size="20" name="facilities[]">
<option id="idOne" value="Value One">Value One</option>
<option id="idTwo" value="Value Two">Value Two</option>
<option id="idThree" value="Value Three">Value Three</option>
</select>
I have done already the php code that can store the value into an Array on my database, but.. what I want now, is that possible to use the ID from the option as a key of the array, so when you storing the array will look like sample below
array('idOne'=>'Value One', 'idTwo'=>Value Two, 'idThree'=>'Value Three')
Instead of array([0]=>'Value One', [1]=>Value Two, [2]=>'Value Three') (that what I get now).
Any kind help will much appreciate :)
Sorry my English bad.
By definition, only the value of your option tags will be passed in your POST. There's a couple of options here
First, you would need to know the values on the other end and marry them up. This is more work potentially but you would always have a list of the values selected.
$vals = array('idOne'=>'Value One', 'idTwo'=>'Value Two', 'idThree'=>'Value Three');
foreach($vals as $key => $row) {
if(array_search($row, $_POST['facilities']) === false) unset($vals[$key]);
}
Second would be to use JavaScript and build a list of the text values that are selected and POST that (either via hidden field or using AJAX). This is riskier since the data would be in the client's hands but still doable.
I have this issue. I have HTML code stored in the database. I read it, and I display it in my pages using echo $page_content;
I want to add somewhere in the middle of this HTML code a php include. Something like this:
Inside this file I have also html code which is basically the country options for a select:
<option selected="selected" value="">Choose...</option>
<option value="AFGHANISTAN">AFGHANISTAN</option>
<option value="ALBANIA">ALBANIA</option>
<option value="ALGERIA">ALGERIA</option>
<option value="AMERICAN SAMOA">AMERICAN SAMOA</option>
<option value="ANDORRA">ANDORRA</option>
<option value="ANGOLA">ANGOLA</option>
etc etc
Until now I have hard-coded all the countries in many places, which I don't like.
But this is not displayed at all when i do my
echo $page_content;
One of the easiest ways is to use tokens that get replaced with the content.
This can avoid the use of eval - which is not recommended ane would get me down voted by the herd.
For example:
HTML CODE
Hello, _TOKEN2_!
You can then use string replace functions to replace the TOKEN2 (the underscores are there but seemed to disappear here) with whatever you want:
str_replace("_TOKEN2_","World",$page_content);
And so on, you get the idea.
I would recommend you look into using something like Smarty to separate you're PHP and layout.
I need to create a php array from a very large HTML select list. I searched for "dropdown to array" generators and programs but can't find anything. Can someone please suggest a php code that I can use to grab all options from a HTML drop-down list and output an array of them?
update: php or js. Anything that will output an array which I can copy and paste in my script.
Include brackets in the select name; PHP will accept your selection as an array:
<?php print_r($_GET['cars']);?>
<form>
<select name="cars[]" multiple="multiple" size="5">
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</select>
<input type="submit" />
</form>
Upon postback the print_r outputs (depending on selection):
Array ( [0] => saab [1] => mercedes )
If it's javascript:
document.getElementById(<!--the_id_of_the_select-->). Options and just treat it as an array that will create and append (document.createElement('input'), document.forms[0].appendChild(previous_item)) during the onsubmit stage of the forms process.
Alternatively in php:
When you do the loop for the option tags created in the select area, just do a second foreach and create a bunch of hidden elements somewhere else on the form.
Alternatively for both, instead of lots of hidden inputs (with a certain prefix), you could just create a single one that lists all the options in a csv format, or something similar
I have a random amount of select boxes generated by javascript, all containing the same options. Now I wish to have a "master-selectbox" which sets the value for each and every one of them.
Currently I have <select id="changeKlas" onChange="javascript:changeClass(this.parentNode, getElementById(changeKlas))">
At the javascript I've gotten as far as to find each and every select box and I already know how to set the value but the value is not being send to javascript.
On each attempt I have made the getElementById(changeKlas) is null. How can I fix this so I can get the text and value of the selected textbox in the given select?
Try this.
<select id="changeKlas" onChange="changeClass(this)">
And in your JavaScript, this will be transformed to document.getElementById(changeKlas)
You need to quote the id: [...], document.getElementById('changeKlas') -- notice the single quote, double quote needs to be escaped because of the outer one from onChange. Also, notice that getElementById belongs to document
<select id="changeKlas" onChange="changeClass();">
<option value="red">Red</option>
<option value="blue">Blue</option>
<option value="green">Green</option>
<option value="black">Black</option>
</select>
<script>
function changeClass()
{
var changeKlas = document.getElementById('changeKlas').value;
alert(changeKlas);
}
</script>
// On change It will alert the SELECTED VALUE