displaying value of dynamic checkbox in next page . and inserting such value - php

Question

I've created a dynamic checkbox, but failed to display its value on another page. The work I have done is the following:
index.php
<form method="post" action="print.php">
<?php
$host="localhost";
$username="root";
$password="";
$database="checkbox";
mysql_connect($host,$username,$password);
mysql_select_db("$database");
//Create the query
$sql = "select test, rate FROM lab";
$result = mysql_query($sql) or die(mysql_error());
while($row = mysql_fetch_assoc($result)) {
echo <<<EOL
<input type="checkbox" name="name[]"value="$row['test']}/{$row['rate']}"/>
{$row['test']}-{$row['rate']}<br />
EOL;
}
?>
<br>
<input type="submit" name="submit" value="Add" />
</form>
I am trying to display the value on a secon page called print.php:
<?php
print $_POST['name'];
?>

Answer 1

You need to use print_r function to display all values in the array. Like
print_r($_POST['name']);

Answer 2

See What's happening in your code:-
You are naming your check box in array.
So when you will get the submission in php you will receive an array by the name as :- name[]
So $_POST['name'] will return an array in php.
when you use print method then it can only print variable value .
it can't print array or object . if you use print/echo method to print array/object it will just print their type.
So to print an array you can use print_r() method or you can use var_dump() to check what is in variable.
you can access array as you favourite way by any loop.
For more about print-r and var_dump please follow manual link
[php.net manual][1]
http://www.php.net/manual/en/function.var-dump.php

Answer 3

You will need some way for identifying which checkbox is checked. You have couple of options use and index for the variable and get it as index or identify it from the value.
Here i have added $rowNum as index for name.
$rowNum=0;
while($row = mysql_fetch_assoc($result)) {
echo <<<EOL
<input type="checkbox" name="name[$rowNum]"value="$row['test']}/{$row['rate']}"/>
{$row['test']}-{$row['rate']}<br />
EOL;
$rowNum++;
}
Here if you check the first and third checkbox only, at PHP you will get
$_POST['name'] = Array
(
[0] => test0/rate0
[2] => test2/rate2
)
If you are not using the $rowNum as in your code and selecting the same options as above, you will get the folowing output.
$_POST['name'] = Array
(
[0] => test0/rate0
[1] => test2/rate2
)
You can use the array like this at print.php
if (is_array($_POST['name'])){
foreach($_POST['name'] as $key=>$name){
echo $key, '=>', $name,'<br/>';
//Here $key is the array index and $name is the value of the checkbox
}
}