this is probably quite simple but I could do with some help.
I am trying to create a small PHP function that will display a single value form a multidimensional array when the user used two dropdown boxes to select the row and column of the array.
So, the user will make a selection from the first dropdown box, which will contain the titles of the rows, and then make a selection from a second dropdown box, which will contain the titles of the columns. Once the selections have been made, the function then needs to output the value for the specific row and column selected.
I thought I had created an array that would work but, sadly no. I have 6 rows and 6 columns in my data table.
Also, is there a JQuery or Javascript alternative?
Just looking for a few pointers to get me on my way.
Thanks in advance,
Micanio
You could either do this on the server-side or through JS.
JS: Have the script update a hidden form field with the value using the onChange() event of the drop downs. Then simply grab that hidden field when the form is posted back to the server (of source always checking for valid data).
PHP: The form will provide the two values $_POST['field1'] and $_POST['field2'] (which of course you will sanitize before using). The script could define a multidimensional array that you could feed those two values into:
$finalValue = $mdArray[$SanitizedField1][$SanitizedField2];
From there just store the $finalValue however you'd like.
$data = array();
for ($i=0;$i<6;$i++) {
$data[$i] = array();
for ($j=0;$j<6;$j++)
$data[$i][$j] = rand(0,100);
}
This should create an array similar to what you have described.
You can then access it like so...
echo $data[0][3];
Your form would need two select fields, both will values 0-5 then you can take the both of them and use them to access a value in your array.
If I understand your question correctly, you need something like a user selects a drop down list. Once selected, the option populates a second list. A real world example would be a user selects on Country to fill in a form and it will populates the States drop down list.
This kind of functionality is usually done with javascript not server side php.
http://javascript.internet.com/forms/country-state-drop-down.html
Related
In Chosen I get multi-selected values using the following code in jQuery -
$("chosen-selector").chosen().val()
But if I want to get these multiple selected values of select within a form via PHP it gives only single option value -
$multiple_values = $_REQUEST['chosen_select_name']
$multiple_values variable returns only a single value. How can I get multiple selected values using PHP.
You need to make this field as array so that php can understand you will be passing multiple values. in html part make your field name from "chosen_select_name" to "chosen_select_name[]" and check the request.
Multi select behavior works same as checkbox logic.
Example, I want the drop down value to be 1278|Toy Name
I would like to then separate via the | and spost the id "1278" in an id field
and "Toy 2" in a toy field.
I am actually using FormTools (formtools.org) for all of my forms and this is one thing I just can not get my head around.
A little background: This is for a client and needs to be this way. they need the ID submitted as well as the Toy Name into separate Db tables.
Any help would be greatly appreciated.
You could split the submitted value based on the | and use the retrieved values to insert into the database.
$toyInput = $_POST["toyInput"];
$toySplit = explode("|", $toyInput);
$toyID = $toySplit[0];
$toyName = $toySplit[1];
// Now insert $toyID and $toyName into your DB in separate fields.
Be aware that this has no validation, a user could easily put fake ID's, names, or a value with no "|" and cause your script to error out. Be sure to add extra checks for these cases!
You can also use list that assign values to a list of variables.
$toyInput = $_POST["toyInput"];
list($toyID, $toyName) = explode("|", $toyInput);
I am working on a booking script in PHP and I need to get their values. To be clear the select is not multiple value select where you select many values in one select. It is just plain and simple select fields in a form. The problem is i can't be sure how many of them there are and what their names are. Is there a way to get their names and and values without knowing how many of them there are and what their names are when I click the submit button? I use a while loop to print them. I was suggested use sessions to achieve this but I am not exactly sure how I would implement it.
All data that the html part is tranfering to the php part of the page is sent to a variable ($_GET, $_POST). Which one is defined by the method you are using for the form itself. The variable itself is built as an array with fieldname as the key of the array element and the value (either value of the selected element for select fields, or the input value for input fields, ....) as value of the array element.
If you want to parse through all elements that you have in the form field, then you can use foreach (it gets a bit more complicated if you don't want to parse through all elements......then I would suggest that you make sure that all the fields that you want to process begin with a specific "tag" in their name, which only they have. As an example c_Field1, c_Field2, Field3, Field4,.... with c_ being the tag....you can then either use string functions on the key (which is equal to the fieldname) or you can use arrayfunctions to only get these fields).
As an example with foreach if you want to get all fields beginning with 'c_':
foreach ($_POST as $fieldname => $value)
{
if (str_replace('c_','',$fieldname)!=$fieldname)
{
//field to be processed so use $value
}
}
If you submit them, they are in the POST variable (well, could be GET, but probably not). That thing is an array, so you can use all the fancy array functions to find out what's inside
for instance:
http://php.net/manual/en/function.array-keys.php
or just a plain old foreach I guess.
I have a page that retrieves records from 1 table in a database when a certain condition is met.
What I want to achieve is to provide the use to with an opportunity to update each record displayed using text boxes.
I am having trouble interpreting what logic to proceed with after the user hits the 'submit' button.
Normally, if I'm updating one record (or a static number of records), I will use the apporpriate amount of SQL statements.
Since the amount of records are dynamically generated, what is the best way to update all at once? How would I know which records were retrieved in the first place to update?
FOR EXAMPLE:
OK, We have a table with student ids (ID), names (SNAME), subjects (SUBJ), grade for each subject (GRADE) and general remarks (COMMENTS).
I want to retrieve information about all students that got an 'A', and write UNIQUE congratulatory remarks for each student (such as 'good job', or 'congratulations', or etc.)
I'd retrieve the records and lay them out on the page, with a text box next to each student record for the comments to be entered. Because I don't know how many text boxes to make, I give the text boxes dynamically generated names using the student ID. The user now enters unique comments for each student, and clicks on submit.
Now, how am I supposed to update these records with the values entered in each text box?
I wouldn't know which students were retrieved in the first place - how would I know what names to use? I'm trying to avoid having to execute the query again after submitting - but is there any other way?
Hope this question was not too confusing.
thanks
Further expanding earlier answers:
You need a loop (e.g. foreach) to display and save the textareas. If the names of the textareas include the students ID, you don't need to know the name, because the text is inserted to the database by the primary key (the students ID). You may name your form-elements as array, to iterate over them, for example (where the numbers are the IDs):
<textarea name="comment[2345234]"></textarea>
<textarea name="comment[8957485]"></textarea>
Read it out as described by #evan:
foreach((array)$_POST['comment'] as $studentId => $studentComment)
{
var_dump($studentId, $studentComment);
}
And if you implement this whole thing as self-requesting form (Affenformular in german), you may also use just one single loop to save and output the textareas.
"I don't think you're understanding what I'm trying to ask." Maybe you don't understand the answers, even you stated it. You don't need a students name to save a database record. But if you really want to submit it, you may also use hidden inputs.
Use foreach() to find the values you care about, put them in an array, and process the array.
Expanding on #Ignacio's answer to make it more easily understandable:
foreach($_POST as $name_of_input => $value_of_input)
{
// do stuff - here is something so you can see the results after the submit
echo "$name_of_input :: $value_of_input <br>";
}
i'm sending values from one page via jquery's ajax to a php page. I'm hoping to store the recieved values into a db. so far this is my php page:
<?php
$supp_short_code = $_POST['supp_short_code'];
$om_part_no = $_POST['om_part_no'];
$description = $_POST['description'];
$price_each_nett = $_POST['price_each_nett'];
$cost_total = $_POST['cost_total'];
?>
The thing is, this php is going be receiving potentially multiples of each post with every "submit" so there could be 5 of each (ie. 5 items ordered). So where would i go from here to stick these values into a suitable mysql query. Also every order needs to have a unique id. Its actually getting the same id number to each order item that i'm struggling with, if that makes sense? Do these need to go into an array and then through a for-loop? Essentially one row in the db is these fields from the "post"...
The form fields need to be element arrays in HTML, and you will have to treat each $_POST element as an array. In your form's HTML add brackets to the field names, i.e. name="supp_short_code[]" When the form is submitted you can loop through these items and complete an insertion into the database.