I need some help !, I am working on a project where I want to select all those check boxes, which has value fetched from database. Let suppose I have a table which has 4 fields as id, news_title, news_desc and flag. flag field has value like 0 for not checked and 1 for checked. now when I query that table I want only those check boxes which has flag value 1 should be checked and other are not not checked.. How can I do this.. Please Help. Thanks.
Assuming you know how to get the result from mysql you would put the following into your while results loop.
if ($row['flag'] == 1){
echo '<input name="checkbox_name" id="checkbox_id" type="checkbox" checked="yes">';
}else{
echo '<input name="checkbox_name" id="checkbox_id" type="checkbox">';
}
obviously this is just for illustration - there are better ways to do this (like storing $checked = "" or $checked = 'checked="yes"' and the echoing it in-line).
in the HTML it can be checked="yes" or checked
Assuming $row contains your result row, you could use something like:
echo '<input type="checkbox" name="name"' . ($row['flag']==1?'selected="selected"':null) . '/>';
Related
Following is select option to retrieve the data from mysql db in php. On selecting the dropdown, I need to insert option value to mysql db.
<select device_id='device_id'>;
<?php
require_once('sqlcon.php');
$drop=mysql_query("select * from device");
while($row = mysql_fetch_array($drop)){
echo "<option value='" .$row['device_id']. "'>" . $row['device_id']. "</option>";
}
?>
</select>
I am using the following in add.php . Error is showing only in this line.
$device_id=$_POST['device_id'];
Also check that the device_id is set or not.
isset() function in PHP determines whether a variable is set and is not NULL. It returns a Boolean value, that is, if the variable is set it will return true and if the variable value is null it will return false.
if(isset($_POST['device_id'])){ $device_id = $_POST['device_id']; }
your error says it all,your select box does not have a "name" attribute, you need to give it one..
<select name='device_id'>
undefined index: device_id in C:\...\ in add.php on line 55
It tells what is wrong, $_POST['device_id'] (Index = device_id) is not setted. Make sure you have <select name='device_id'>...</select>
name='device_id' = $_POST['device_id']
Use attribute onchange="document.forms[0].submit()" to submit the form on selected option.
Add hidden field in form.
<input type="hidden" name="action" value="submit" />
Get device_id
if(isset($_POST["action"])) {
echo $_POST['device_id'];
}
I tried combining two answers from here:
counting how many checkbox are checked php/html
And here:
validating input types "checkbox" and "number" php/html
My goal is to count how many checkboxes were selected, and insert their values along with the number value in the number input.
I found various other posts about it, but couldn't figure out an answer.
Here is the code:
echo '<form action="" method="post">';
Then I have a for loop, where I create my table rows, with the checkboxes.
Where $id = $row[0] is updated on each loop, which is the id equivalent of my entry.
(The output of
echo '<td style="vertical-align: top;">' . $row[0] . '</td>';
Shows the id correctly)
echo '<tr>';
echo "<td style='vertical-align: top;'><input type='checkbox' name='choice[$id][id]' value='$id'></td>";
echo "<td style='vertical-align: top;'><input type='number' name='choice[$id][order]' size='20'></td>";
echo '</tr>';
echo '<b> <input type="submit" value="Insert"></b>';
Then, on the next page, I have this:
$var_checkbox=$_POST['choice'];
$sql_var_id = "SELECT id FROM custom_form WHERE id=(SELECT max(id) FROM custom_form)";
$var_id_result = mysqli_query($link,$sql_var_id);
$var_id = mysqli_fetch_array($var_id_result);
$count=count($var_checkbox[$var_id[0]]);
for($i=0; $i<$count; $i++){
if($var_checkbox[$i]!= NULL){
$sql1 = sprintf("INSERT INTO custom_form_has_property (custom_form_id,property_id,field_order) VALUES ('%d','%d','%d');",
$var_id[0],
$var_checkbox[$var_id[0]][id],
$var_checkbox[$var_id[0]][order]
);
$result1 = mysqli_query($link,$sql1);
}
}
The problem is, that no values of checkboxes or numbers are inserted.
(As a side note, to try and be more specific)
If instead of matrixes, I use
echo "<td style='vertical-align: top;'><input type='checkbox' name='choice[]' value='$row[0]'></td>";
echo '<td style="vertical-align: top;"><input type="number" name="order[]" size="2"></td>';
And
$var_checkbox=$_POST['choice'];
$order = $_POST['order'];
Then
echo "Orders: $order[0],$order[1],$order[2],$order[3],$order[4],$order[5],$ordemr[6]";
echo "Choices: $var_checkbox[0],$var_checkbox[1],$var_checkbox[2],$var_checkbox[3],$var_checkbox[4],$var_checkbox[5],$var_checkbox[6]";
Will output
Orders: 1,,2,,3,,Choices: 1,3,13,,,,
I need the choiced from the checkboxes to be somehow linked to the orders from the number field. And the only way to achieve that, is if they have the same name, but different indexes, which is why I have the matrix, in the first index, it's saved the id number, which is generated on each loop, and in the second, the actual name, which makes the distinction between them (id and order).
I tried various other things, but it all comes back to the same problem...
The value of order (number) is stored into the array, even when null, while the value of choices (checkbox) doesnt.
I could do an array_filter(), but there is no guarantee that the user will not input an order, while not ticking a choice checkbox.
If I would compare the length of choice with the length of order, after filtered, and if they output the same size, there is still no guarantee, that the user didnt check checkbox of line x, and added a value in the order field, on line y.
Maybe there is a way to pass unchecked values to the choice[] variable as null, the same way it happens in order[]?
What is this? choice[.$id.] ? what are the dots for?
I believe this is the bug!
You probably were trying to concatenate $id into the string before and just forgot to remove them?
Corrected line:
echo "<td style='vertical-align: top;'><input type='checkbox' name='choice[$id][id]' value='$id'></td>";
there are some way to do this ..
you have to count total no of selected check box via jQuery and set those value in hidden field at view page on each check box check or on form submit
you have to take counter on insert part and save the ids and at last update ids value with counter value in database ....
this is my html code
<input type='checkbox' name='cbox[]' value='Jaywalking' />
Jaywalking<br>
<input type='checkbox' name='cbox[]' value='Littering' />
Littering<br>
<input type='checkbox' name='cbox[]' value='Illegal Vendor' />
Illegal Vendor
this is my php code
if(isset($_POST['save']))
{
$license_save=$_POST['license'];
$stickerno_save=$_POST['stickerno'];
$fname_save=$_POST['fname'];
$mname_save=$_POST['mname'];
$lname_save=$_POST['lname'];
$no_save=$_POST['no'];
$street_save=$_POST['street'];
$city_save=$_POST['city'];
$bdate_save=$_POST['bdate'];
$violationplace_save=$_POST['violationplace'];
$dd_save=$_POST['dd'];
$mm_save=$_POST['mm'];
$yy_save=$_POST['yy'];
$hh_save=$_POST['hh'];
$min_save=$_POST['min'];
$ampm_save=$_POST['ampm'];
if(is_array($_POST['cbox'])) $violation_save=implode(',',$_POST['cbox']); else $violation_save=$_POST['cbox'];
mysql_query("UPDATE tblcitizen SET license ='$license_save', stickerno ='$stickerno_save', fname ='$fname_save', mname ='$mname_save', lname ='$lname_save', no ='$no_save', street ='$street_save', city ='$city_save', bdate ='$bdate_save', violationplace ='$violationplace_save', dd ='$dd_save', mm ='$mm_save', yy ='$yy_save', hh ='$hh_save', min ='$min_save', ampm ='$ampm_save', violation ='$violation_save', type ='$type_save', officer ='$officer_save', date ='$date_save', ttime ='$ttime_save' WHERE id = '$id'")
or die(mysql_error());
echo "<script>alert('Successfully Edited')</script>";
header("Location: citizen.php");
}
I want to edit some account registered, how can i retrieve 1 or more checkboxes value from the database.
EDITED FOR BETTER ANSWER
if(is_array($_POST['cbox'])) $violation_save=implode(',',$_POST['cbox']); else $violation_save=$_POST['cbox'];
Your query is taking the cbox array, turning it into a string with commas if it is an array (if more than one checkbox was checked), otherwise inserting just one checkbox value with no comma.
To get the values out, just read the string, then compare it with a php strpos()
<?
// Get the checkboxes that were previously selected
$result = mysql_query("SELECT violation FROM tblcitizen WHERE id = '$id'") or die(mysql_error());
while ($row = mysql_fetch_assoc($result)) {
// put the string into a variable
$mystring = $row['violation'];
}
// use a ternary to determine if this checkbox exists
// if so, make the variable $checked to check the checkbox, otherwise leave it blank
$checked = (strpos($mystring, 'Jaywalking')) ? 'checked' : '';
?>
// write the checkbox to the page. and echo the contents of $checked
// if it was found with strpos() then it will be checked, otherwise it will not be
// <?= ?> is a quick way to echo a variable without the echo command
<input type='checkbox' name='cbox[]' value='Jaywalking' <?=$checked;?> />
I don't quite understand your sentence of "how can i retrieve 1 or more check boxes value from the database" but since I can see your update statement, I am assuming that you want to take the one or more value from the check boxes and update the table in the database.
You will receive the check box value in form of an array
You need to loop through the array and get the value
Store value in one variable and you are good to go to store it in the database
foreach ($cbox as $val) {
$Violation .= $val.",";
}
You can always remove the last comma using PHP substring by the way. Cheers, hope this helps you and anybody out there. Thank You.
this may be a redundant question, but i gave up searching for answers already.
My question is, how do I pass in a php variable into the checkbox value.
For an example if I have $theRowID = $row['id'], I want to make the check box value as,
checkbox value ="$theRowID"
If you're generating your HTML in a .php file, you can do it like this:
// assuming you're looping through a query result, also assuming mysqli
$query = mysqli_query('SELECT id FROM tbl');
while ($row = mysqli_fetch_assoc($query)) {
echo '<input type="checkbox" name="foo[]" value="'. $row['id'] .'" />';
}
I have a form with several checkboxes which values are pulled from a database.
I managed to display them in the form, assign an appropriate value to each, but cannot insert their values into other database.
Here's the code:
<form id="form1" name="form1" method="post" action="">
<?php
$info_id = $_GET['info_id'];
$kv_dodatoci = mysql_query("SELECT * FROM `dodatoci`") or die('ERROR DISPLAYING: ' . mysql_error());
while ($kol = mysql_fetch_array($kv_dodatoci)){
$id_dodatoci = $kol['id_dodatoci'];
$mk = $kol['mk'];
echo '<input type="checkbox" name="id_dodatoci[]" id="id_dodatoci" value="' . $id_dodatoci . '" />';
echo '<label for="' . $id_dodatoci.'">' . $mk . '</label><br />';
}
?>
<input type="hidden" value="<?=$info_id?>" name="info_id" />
<input name="insert_info" type="submit" value="Insert Additional info" />
</form>
<?php
if (isset($_POST['insert_info']) && is_array($id_dodatoci)) {
echo $id_dodatoci . '<br />';
echo $mk . '<br />';
// --- Guess here's the problem ----- //
foreach ($_POST['id_dodatoci'] as $dodatok) {
$dodatok_kv = mysql_query("INSERT INTO `dodatoci_hotel` (id_dodatoci, info_id) VALUES ('$dodatok', '$info_id')") or die('ERROR INSERTING: '.mysql_error());
}
}
My problem is to loop through all checkboxes, and for each checked, populate a separate record in a database.
Actually I don't know how to recognize the which box is checked, and put the appropriate value in db.
You can tell if a checkbox is selected because it will have a value. If it's not selected, it won't appear in the request/get/post in PHP at all.
What you may want to do is check for the value of it and work based on that. The value is the string 'on' by default, but can be changed by the value='' attribute in HTML.
Here are a couple snippets of code that may help (not exactly production quality, but it will help illustrate):
HTML:
<input type='checkbox' name='ShowCloseWindowLink' value='1'/> Show the 'Close Window' link at the bottom of the form.
PHP:
if (isset($_POST["ShowCloseWindowLink"])) {
$ShowCloseWindowLink=1;
} else {
$ShowCloseWindowLink=0;
}
.....
$sql = "update table set ShowCloseWindowLink = ".mysql_real_escape_string($ShowCloseWindowLink)." where ..."
(assuming a table with a ShowCloseWindowLink column that will accept a 1 or 0)
As an extra note: You're using the wrong HTML syntax for IDs and <label>. <label>'s "for" attribute should point to an ID, not a value. You also need unique IDs for each element. The code you have posted would not validate.
Also, you're not validating your code at all. At the very least, do a htmlspecialchars() or htmlentities() on the input before you output it and a mysql_real_escape_string() before you insert data into the DB.
2nd Answer:
You might do something like this:
HTML:
echo '<input type="checkbox" name="id_dodatoci[]" value="'.$id_dodatoci.'" />';
PHP:
if ( !empty($_POST["id_dodatoci"]) ) {
$id_dodatoci = $_POST["id_dodatoci"];
print_r($id_dodatoci);
// This should provide an array of all the checkboxes that were checked.
// Any not checked will not be present.
} else {
// None of the id_dodatoci checkboxes were checked.
}
This is because you are using the same name for all of the checkboxes, so their values will be passed to php as an array. If you used different names, then each would have it's own post key/value pair.
This might help too:
http://www.php-mysql-tutorial.com/php-tutorial/using-php-forms.php
This is the loop that I needed. I realized that I need a loop through each key with the $i variable.
if(isset($_POST['id_dodatoci'])){
$id_dodatoci=$_POST['id_dodatoci'];
$arr_num=count($id_dodatoci);
$i=0;
while ($i < $arr_num)
{
$query="INSERT INTO `dodatoci_hotel`(id_dodatoci,info_id)
VALUES ('$id_dodatoci[$i]','$info_id')";
$res=mysql_query($query) or die('ERROR INSERTING: '.mysql_error());
$i++;
}
}
Well, as Eli wrote, the POST is not set, when a checkbox is not checked.
I sometimes use an additional hidden field (-array) to make sure, I have a list of all checkboxes on the page.
Example:
<input type="checkbox" name="my_checkbox[<?=$id_of_checkbox?>]">
<input type="hidden" name="array_checkboxes[<?=$id_of_checkbox?>]" value="is_on_page">
So I get in the $_POST:
array(2){
array(1){"my_checkbox" => array(1){[123]=>"1"}}
array(1){"array_checkboxes" => array(1){[123]=>"is_on_page"}}
}
I even get the second line, when the checkbox is NOT checked and I can loop through all checkboxes with something like this:
foreach ($_POST["array_checkboxes"] as $key => $value)
{
if($value=="is_on_page")
{
$value_of_checkbox[$key] = $_POST["my_checkbox"][$key];
//Save this value
}
}
Also something that few people use but that is quite nice in HTML, is that you can have:
<input type="hidden" name="my_checkbox" value="N" />
<input type="checkbox" name="my_checkbox" value="Y" />
and voila! - default values for checkboxes...!