I'm using an online shopping cart which takes items ordered and passes their unique ID through the URL to a process.php page. So the URL would look something like
process.php?code_1=231&code_2=532&code_3=342
Another code_x=xxx is generated for each item ordered. On the process.php page, how would I create an array to get the values of the code_x without knowing how many items are ordered?
This problem is much better solved by changing the names of the elements in your form to code[].
For example, where you now have let's say
<input type="text" name="code_1" ... />
<input type="text" name="code_2" ... />
<input type="text" name="code_3" ... />
You would change that to
<input type="text" name="code[]" ... />
<input type="text" name="code[]" ... />
<input type="text" name="code[]" ... />
After doing this, $_GET['code'] will be an array which contains all the values from the text boxes as its items.
Update:
If you cannot control the names of the incoming parameters, you need to parse manually. Here's how I would do it:
// Sample data
$get = array('code_1' => 'foo', 'code_2' => 'bar', 'code_X' => 'X', 'asdf' => 'X');
$codes = array();
foreach($get as $k => $v) {
// Reject items not starting with prefix
if (substr($k, 0, 5) != 'code_') {
continue;
}
// Reject items like code_X where X is not all digits
$k = substr($k, 5);
if (!ctype_digit($k)) {
continue;
}
$codes[$k] = $v;
}
print_r($codes);
It would be much better to use an array like Jon suggested.
It also would be cleaner to not use get for this. But rather post.
However if you really want to go this route you could do:
foreach($_GET as $name=>$value) {
if (strpos($name, 'code_') !== 0) continue;
// here are the names and values of the items
}
However again: I would not recommend it.
print_r($_GET);
foreach($_GET as $key=>$val)
{
echo '<br />';
echo $key.' : '.$val;
}
You have to iterate through $_GET and look for names.
foreach(!empty($_GET as $name=>$value)) {
// Check for match names for your
if (preg_match('/^code_[1-9]$/', $name)) {
// Do whatever with values
}
}
ereg has been deprecated as of PHP 5.3.0. Use preg_match instead.