I have a dynamic multi input. When submit form, inserting array values. But I want to insert without 'submit' value.
This is the foreach loop, (sql secure not included)
if (isset($_POST['submit'])) {
$nearest = $db->prepare('insert into nearest set place=?, distance=?');
$i = 0;
foreach ($_POST as $val) {
$place = $_POST['place'][$i];
$distance = $_POST['distance'][$i];
$nearest->execute([$place, $distance]);
$i++;
}
}
This loop inserted '$_POST' values and inserted empty row.
If you want to keep the loop you can use array_slice to not include the last item in the loop.
Array_slice will take items from 0 (not literal, but the first item) to second to last (-1).
http://php.net/manual/en/function.array-slice.php
EDIT; I think you need a for loop to loop the count of "place".
if (isset($_POST['submit'])) {
$nearest= $db -> prepare('insert into nearest set place=?, distance=?');
for($i=0; $i< count($_POST['place']; $i++){
$place = $_POST['place'][$i];
$distance= $_POST['distance'][$i];
$nearest-> execute([$place , $distance]);
$i++;
}
}
example: https://3v4l.org/F47ui
You can simply remove your submit key from $_POST prior doing your loop with just regular unset(). But this is bad approach. What I'd rather recommend doing instead is to "isolate" your data, and instead of this:
<input name="distance" ... >
make all your imputs like this:
<input name="data[distance]" ... >
then you just need to loop over "data" (name as you like) array:
foreach($_POST['data'] as val)
Also, resist from removing last element in blind, because it's based on false assumption that this is always your "submit" element. What if you add more submit buttons to the form? or the order will change?
Related
I have the following Fiddle set up here Fiddle
As you can see, I am able to add inputs by clicking the Add Row button.
All inputs that are added have a unique id and name. The problem is, I cant just do something like
$actionInput = $_POST["actionInput"];
Because I might need
$actionInput1 = $_POST["actionInput1"];
$actionInput2 = $_POST["actionInput2"];
$actionInput3 = $_POST["actionInput3"];
Depending on how many rows are added. So how can I get all the inputs without knowing what inputs I need to grab?
Thanks
Actually, you need to maintain counter in hidden, which you will get at the time of posting the form in case you don't want to maintain elements as array, otherwise you can put elements as array as described below:
<input type=text name="inputs[]" />
Name your inputs with array boundary, like:
<input type=text name="actioninput[]" />
now you can itreate throught them in you POST or GET ( depends ) array:
print_r($_POST);
Assuming your JSFiddle works fine for you, following are the steps.
1) Get keys of $_POST.
2) Get maximum counter value from keys.
3) Take a for loop from 0 to count of post.
4) If counter is 0, no suffix, else, add counter as suffix.
5) Now, you get posted variable.
6) Repeat it for every element in rows.
<?php
$keys = array_keys($_POST);
$keys = implode(',', $keys);
$n = str_replace('actionInput', '', $keys);
$m = explode(',', $n);
$max = max($m);
for ($i=0 ; $i<=$max ; $i++) {
$suffix = ($i==0) ? '' : $i;
if (isset($_POST['actionInput' . $suffix])) {
echo "<br/>-".$_POST['actionInput' . $suffix];
}
}
replace name=actionInput with name=actionInput[]
it should be an array with same name
same thing will apply with all form fields generated dynamically whose values you'll need.
Change this line in Add row jquery event
return name + i to return name
Remove i from it and then
name=actionInput[]
print_r($_POST);
It will gives array of actioninput
I am attempting to use a for loop or for each loop to push the values from a get query to another variable. May I have some help with this approach?
Ok here is where I am:
for ($i = 0 ; i < $_GET['delete']; i++) {
$_jid [] = $_GET['delete'];
}
You don't actually need a loop here. If $_jid already is an array containing some values, consider just merging it with $_GET['delete'].
if (is_array($_jid)) {
$_jid = array_merge($_jid, $_GET['delete']);
}
If $_jid is not an array and doesn't exist except as a container for $_GET['delete'] you do can just assign the array. There is no need to loop at all.
$_jid = $_GET['delete'];
Of course in that case, you don't even need to copy it. You can just use $_GET['delete'] directly, in any context you planned to read from $_jid.
Update:
If the contents of $_GET['delete'] are originally 923,936, that is not an array to begin with, but rather a string. If you want an array out of it, you need to explode() it on assignment:
$_jid = explode(',', $_GET['delete']);
But if you intend to implode() it in the end anyway, there's obviously no need to do that. You already have exactly the comma-delimited string you want.
As you can see if you do a var_dump($_GET), the variable $_GET is a hashmap.
You can easily use a foreach loop to look through every member of it :
foreach($_GET as $get) // $get will successively take the values of $_GET
{
echo $get."<br />\n"; // We print these values
}
The code above will print the value of the $_GET members (you can try it with a blank page and dull $_GET values, as "http://yoursite.usa/?get1=stuff&get2=morestuff")
Instead of a echo, you can put the $_GET values into an array (or other variables) :
$array = array(); // Creating an empty array
$i = 0; // Counter
foreach($_GET as $get)
{
$array[$i] = $get; // Each $_GET value is store in a $array slot
$i++;
}
In PHP, foreach is quite useful and very easy to use.
However, you can't use a for for $_GET because it's a hashmap, not an array (in fact, you can, but it's much more complicated).
Hope I helped
I'm not exactly sure how the logic would work on this. My brain is fried and i cant think clearly.
I am handling some POST data, and one of the fields in this array is a quantity string. I can read this string and determine if there are more than 1 widgets that need handled.
if($quantity <= 1){ //$_POST[widget1] }
Now say there are 4 widgets. The quantity field would reflect this number, but how would i loop through them and assign them to a new array themselves?
$_POST[widget1], $_POST[widget2], $_POST[widget3], $_POST[widget4]
How do i take that quantity number, and use it to grab that many and those specific named items from the post array, using some kind of wild card or prefix or something? I dont know if this is a for, or while, or what kind of operation. How do I loop through $_POST['widget*X*'], where X is my quantity number?
The end result is im looking to have an array structured like this:
$widgets[data1]
$widgets[data2]
$widgets[data3]
$widgets[data4]
Using a for loop, you can access the $_POST keys with a variable, as in $_POST["widget$i"]
$widgets = array();
for ($i=1; $i<=$quantity; $i++) {
// Append onto an array
$widgets[] = $_POST["widget$i"];
}
However, a better long-term solution would be to change the HTML form such that it passes an array back to PHP in the first place by adding [] to the form input's name attribute:
<input type='text' name='widgets[]' id='widget1' value='widget1' />
<input type='text' name='widgets[]' id='widget2' value='widget2' />
<input type='text' name='widgets[]' id='widget3' value='widget3' />
Accessed in PHP via $_POST['widgets'], already an array!
var_dump($_POST['widgets']);
Iterate over the number of items, at least over one (as you describe it):
$widgets = array();
foreach (range(1, max(1, $quantity)) as $item)
{
$name = sprintf('widget%d', $item);
$data = sprintf('data%d', $item);
$widget = $_POST[$name];
// do whatever you need to do with that $widget.
$widgets[$data] = $widget;
}
I want to insert whether or not a checkbox was selecting into MySQL, simply by adding 1 or 0 to the column that corresponds to the value. I am having a problem with the 0s, detailed below.
Here is an example of the checkboxes
<input type='checkbox' name='class[]' value='mathhl' id="mathhl">
For simplicity I added this
$classes = $_POST["class"];
Here is the foreach loop to check the values of the checkboxes.
foreach($classes as $value) {
if (!isset($value)) {
$value = 0;
}
else {
$value = 1;
}
echo $value;
}
For some reason, it only returns the 1s, but not 0s! I am new to PHP, so I'd like to know where exactly I'm going wrong with this, thanks!
Only checked checkboxes are sent to the server. So, if the value is not present in the array, that's because the box wasn't checked.
You can simplify your logic by making the values the keys in your array:
<input type='checkbox' name='class[mathhl]' value='1' id="mathhl">
Now, you don't have to loop over $_POST['class']. Instead, you can take an array of the all the keys (which you should already know):
$keys = array( 'mathh1', 'mathh2', 'mathh3');
And form an array with the default values (say 0):
$defaults = array_combine( $keys, array_fill( 0, count( $keys), 0));
And merge the $_POST array with the defaults array:
$results = array_merge( $defaults, $_POST['class']);
Now, $results will contain an associative array, with the keys being the columns and the values being 1 or 0, depending on whether or not the checkbox was checked. Be careful, as somebody can post and data they want to $_POST, so it may not be only 1's and 0's.
I need to get all the elements from a textarea in a HTML form and insert them into the MySQL database using PHP. I managed to get them into an array and also find the number of elements in the array as well. However when I try to execute it in a while loop it continues displaying the word "execution" (inside the loop) over a 1000 times in the page.
I cannot figure out what would be the issue, because the while loop is the only applicable one for this instance
$sent = $_REQUEST['EmpEmergencyNumbers'];
$data_array = explode("\n", $sent);
print_r($data_array);
$array_length = count($data_array);
echo $array_length;
while(count($data_array)){
echo "execution "; // This would be replaced by the SQL insert statement
}
you should use
foreach($data_array as $array)
{
//sql
}
When you access the submitted data in your php, it will be available in either $_GET or $_POST arrays, depending upon the method(GET/POST) in which you have submitted it. Avoid using the $_REQUEST array. Instead use, $_GET / $_POST (depending upon the method used).
To loop through each element in an array, you could use a foreach loop.
Example:
//...
foreach($data_array as $d)
{
// now $d will contain the array element
echo $d; // use $d to insert it into the db or do something
}
Use foreach for the array or decrement the count, your while loop
is a infinite loop if count is >0