I have an array of numbers that can be 1-24. ($timelist) I want to use this array to make a select time form. How would I use this array to toggle the visibility of a radio button?
For example: I have array(1,2,4) and radio buttons 1AM, 2AM, 3AM, and 4AM. I want radio button 3AM to not show based on the array in my php script.
Any ideas on how to make this work?
What I got so far is a form where the user selects a date and hits enter.
It then sends them to a php file named validate.php via get method.
The script will do it's job and place available times into an array.
I want to use that array (1-24) to display the available times as radio buttons (12AM to 12PM) where the user can select one based on a time available and continue the application process.
$timelist = array( 1, 2, 4 );
foreach($timelist as $time):
echo "<input type='radio' name='time' value='$time' /> $radio AM<br />";
endforeach;
Something like that, you mean?
Edit: to have nice formatting, you could do something along the lines of
$time%12 . ( $time >= 12 ? 'PM' : 'AM' )
From your question, I understand that you initially do send the radio input to the client in the response HTML, and you want to hide it afterwards? This doesn't make much sense - simply prepare the response HTML according to the elements in the array, instead of rendering everything and than hiding it. Do something like:
<?php foreach ($timelist as $time): ?>
<input type="radio" name="time" value="<?php echo $time?>" /> <?php echo $time?>
<?php endforeach; ?>
for military time inclusion try this
<?php $i = 1; ?>
<?php while ($i <= 24): ?>
<input type="radio" name="time" value="<?php echo $i; ?>" />
<?php echo (12 < $i ? $i .' AM': ($i -12).' PM'); >
<?php $i++; ?>
<?php endwhile; ?>
Related
I have a MySQL database that stores items (goods and services), and along with each item, terms (terms and conditions) will also be stored, which can be roughly 2000 bytes.
http://i.imgur.com/7t3cvSE.png
This is my basic set up
$term_options = array();
$term_options[] = "None";
$term_options[] = "massive string containing 2000 bytes or more";
...
foreach ($term_options as $term) {
?>
<label class="term">
<input type="radio" name="terms" value="<?php echo $term; ?>">
<?php echo $term; ?>
</label>
<?php
}
The above code does exactly what I want, but it feels wrong to have a massive value within a radio input (which may contain Unicode characters). Am I wrong to worry?
Before, I used a SELECT menu with option values equal to the index position of each array item:
?>
<select name="terms">
<?php
$i = 0;
for ($i = 0; $i < count($term_options); $i++) {
?>
<option><?php echo $i; ?></option>
<?php
}
?>
</select>
<?php
Then my $_POST would look something like this:
$terms = $term_options[$_POST['terms']];
It worked nicely until it came to my update form which should display the currently selected values. I wasn't sure how to compare the isset value with something generated via array.
It's simple to do this with static values, e.g.:
<option <?php if (isset($row['x']) && $row['x'] === 'x') echo 'selected'; ?>>x</option>
but while creating each option in a foreach loop, I have no idea what to do and the below doesn't work:
<option <?php if (isset($row['x']) && $row['x'] === $term_options[$i]) echo 'selected'; ?>><?php echo $i; ?></option>
$i++;
Yes, you are right in your worries. If this page is going to display many of these items and each item has a massive string like this, the final page is going to be huge. An this page will be sent by your server to the client browser. Bigger the page, bigger the time.
You are retrieving these items from a MySQL database. Each item probably has a primary key. Why don't you just use this primary key as part of the name of the radio buttons and then you may retrieve again just the selected item?
Something like
<input type="radio" name="rb_1">
where this "1" appended to "rb_" is the key of an item. Then you just need to break this string, recover the primary key and search if to recover the huge string.
This may generate another database operation, of course. But this will be nothing when compared with the transmission of a huge page with, say, 100 times 2k items.
I'm trying to write a web application in which students enter their timetable. For example: First period of Monday is math, second period of Monday is English,... first period of Tuesday is history, second period of Tuesday is biology,... etc.
So I write a form like this:
<form method="post" action="timetable_handling.php">
<?php
for ($period=1;$period<=9;$period++)
{
echo "<tr>";
for ($day=1;$day<=7;$day++)
{
echo "<td><input name="the_subject_of_the_nth_$period_on_$day" type="text"></td></tr>";
//the problem is here
}
}
?>
</form>
So my question is, are there any ways to pass the many variables to another php file to handle without having to manually write its name explicitly?
Edit 1: I mean is there anyway to encode the period and day information in the name, so that when it sends to timetable_handling.php I can just loop through it to save it into sql database. Something like an array $subject[day][period].
I would be grateful if someone could help me.
Start with the following on your timetable data entry page:
<form method="post" action="timetable_handling.php">
<table>
<?php
for ($period=1; $period<=9; $period++)
{
echo '<tr>';
for ($day=1; $day<=7; $day++)
{
echo '<td><input name="subject_of_period_'.$period.'_on_day_'.$day.'" type="text"></td>';
//the problem is here
}
echo '</tr>';
}
?>
</table>
<input type="submit" value="Submit Form" />
</form>
Then follow up with this script on your timetable_handling.php:
<?php
for ($day=1; $day<=7; $day++)
{
for ($period=1; $period<=9; $period++ )
{
${'subject_of_period_'.$period.'_on_day_'.$day} = htmlspecialchars($_POST['subject_of_period_'.$period.'_on_day_'.$day],ENT_QUOTES);
echo '<p>Subject of Period '.$period.' on Day '.$day.' is '.${'subject_of_period_'.$period.'_on_day_'.$day}.'</p>';
}
}
?>
It's secure and it works.
Yes. If you format a variable name something like
for ($day=1;$day<=7;$day++)
{ ?>
<td><input name="subject['<?= $period ?>'][<?= $day ?>]" type="text"></td></tr>
//the problem is here
<?php }
PHP will turn $_POST['subject'] into a 2D array for you. (Note I make no promise this is free of syntax errors.)
In the form handler you can loop through all the posted fields like this:
foreach($_POST as $field => $value)
{
}
Where $field would be the input-tag name and $value it's value.
If you have other form elements you can check which ones you need with some kind of prefix, like if the fieldname starts with 'the_subject', you know it's one of the fields that were dynamically added.
sure, you already did part of the answer :)
first issue: you are not escaping your string properly:
Here is 1 another way
echo '<td><input name="'.$period.'_on_'.$day.'" type="text"></td></tr>';
As for handling the post here is what you can do. You might need to tweak it around to get the exact desired result. But you are talking about multidimentional array.
if (isset($_POST)){
$something=array();
foreach ($_POST as $single=>$value)
{
array_push($something, array('period_'.substr($single,0,1) => array('day_'.substr($single,-1)=>$value)));
}
}
echo '<pre>'.print_r($something,true).'</pre>';
Good Luck.
I'm tasked with fixing a job information page at work. When someone clicks "edit job" to edit a job, a form of all the database titles and values is listed and they can click on an input box and change it and update. Basic stuff.
Now, in the input box for "Payment terms:" the percentages are written exactly like this, "40/40/20" and so in the database under payment they're listed as 40/40/20.
So the label + input box looks like this, Payment terms: [40/40/20].
<p><label for='payment'>Payment Terms</label><input name='payment'
id='payment' value='<?php if(isset($data2['payment'])) echo
$data2['payment']; ?>' /></p>
I want to change this to 4 drop down boxes where they can pick the percentages, for instance
Payment terms: [40]
[40]
[20]
[empty]
There is a TON of jobs with their own payment terms in the db and I think I may have to add 4 columns to the db instead of just 1 column named payment and values listed as %/%/%/%.
Obviously that doesn't seem like a good solution as it would take forever to fix all the jobs and enter their data for each term into the new columns.
What should I do ?
You can use explode to split the string from your database. Then you can make 4 <select> boxes:
<?php
$selects = 4;
if (isset($data2['payment'])) {
$percentages = explode("/", $data2['payment']);
// Make sure that the array is long enough by adding zeroes to the end
while (count($percentages) < $selects) $percentages[] = 0;
}
else {
$percentages = array_fill(0, $selects, 0);
}
$options = range(10, 100, 10);
for ($i = 0; $i < $selects; ++$i) { ?>
<select>
<option></option>
<?php foreach ($options as $o) { ?>
<option value="<?php echo $i; ?>"
<?php if ($o == $percentages[$i]) echo ' selected="selected"'; ?>>
<?php echo $o; ?>
</option>
<?php } ?>
</select>
<?php } ?>
I put the blank option first as it will be selected by default that way.
I have a html form with 5 rows and 30 fields. Note the attached image.
I have to capture all of these fields in an array to later convert to a csv file. Each field is labelled at follows: qt1, fa1, en1, et1, ba1, qt2, fa2, etc... Instead of taking each row and adding them to an array in php one at a time is there an easy(ier) way to accomplish this?
I can easily take each row and add them to an array the issue with this i feel would be the speed of the script and the fact that i will have to write 30 lines of array data in the php script.
Is this what you are looking for?
<?php
for($i = 0; $i < 30; $i++): ?>
<input name="qt[<?php echo $i; ?>]"/>
<input name="fa[<?php echo $i; ?>]"/>
<input name="en[<?php echo $i; ?>]"/>
<input name="et[<?php echo $i; ?>]"/>
<input name="ba[<?php echo $i; ?>]"/>
<?php
endfor;
?>
On the server side, you will receive all this data in your $_POST variable anyways, so it will all be in an array regardless. This has an advantage of saving all your values of the same row with the same index and all the same data types under one array.
Not sure about performance, but code readability and maintenance is alot easier like this.
Name the input fields like input[i][j] and you can access them later in php like: $_REQUEST['input'][i][j] as a multidimensional array.
I've created a test system that has multiple steps (using jquery) allowing users to check checkboxes to select their answers, with a summary page and a final submission button... all within a form. I now want to create the scoring system.
1) Firstly this is the code (within a loop) that grabs the answers from Wordpress for each question:
<input type="checkbox" name="answer<?php echo $counter; ?>[]" value="<?php echo $row['answer']; ?>" />
2) In Wordpress next to each answer is a dropdown with a yes or no option to mark whether the answer is right or wrong. This is output in the following way:
<?php $row['correct']; ?>
3) Each correct answer the user checks should be worth 1 point. The passmark is determined by the field:
<?php the_field('pass_mark'); ?>
4) I want it to update a hidden field with the score as the user checks the correct answer:
<input type="hidden" value="<?php echo $score; ?>" name="test-score" />
How can I update the hidden field with the user score as the user is checking the correct answer? I'm not sure what to try with this to even give it a go first!
Ok, everyones spotted a big hole in this. I'm completely open to doing it a hidden way so people can't check out the source. The type of user this is targeted at wouldn't have a clue how to look at the source but might as well do it the right way to start with!
The whole test is within a form so could it only update the hidden field on submit?
I still need some examples of how to do it.
In my opinion you should use sessions for that purpose, because any browser output may be saved and viewed in ANY text editor. This is not right purpose oh hidden input elements. You use hidden inputs when you need to submit something automatically, but never use it when processing some important data.
Mapping your questions and answers via id will allow you not to reveal real answers and scores in HTML.
Just a very simple example how to do that:
<?php
$questions = array(
125 => array("text"=>"2x2?", "answer"=>"4", 'points'=>3),
145 => array("text"=>"5x6?", "answer"=>"30", 'points'=>2),
);
?>
<form method="post">
<?php foreach ($questions as $id => $question): ?>
<div><?php echo $question['text'] ; ?></div>
<input type="text" name="question<?php echo $id ; ?>"/>
<?php endforeach ; ?>
<input type="submit" value="Submit"/>
</form>
/* In submission script */
<?php
if (isset($_POST['submit'])){
foreach($questions as $id => $question){
if (isset($_POST["question{$id}"])){
$answer = $_POST["question{$id}"] ;
if ($answer === $question['answer']){
$_SESSION['score'] += $question['points'] ;
}
}
}
}
Spokey is right - the user would be able to cheat if your score it on the client side like using the method you suggested.
Instead, either user a JQuery $.post call to post each answer and then store the score in a PHP Session. Or just wait until the entire form is submitted and evaluate the score of the form as a whole on the server side.
* Update *
You have to submit the form to a script that can evaluate the form. So say it gets submitted to myForm.php
In myForm.php, get the post vars:
$correct_answers = $however_you_get_your_correct_answers();
//Assuming $correct_answers is a associative array with the same keys being used in post -
$results = array();
if($_POST){
foreach ($_POST as $key=>$value) {
if ($_POST[$key] == $correct_answers[$key]){
$results[$key] = 'correct';
}
else $results[$key] = 'incorrect';
}
}
This is untested, but it should work.