Let's say I have data string like this...
one=1&two=2&three=3&four=4&two=2
I'm using php foreach to grab the key/value and sort how I need it at this point
foreach($_POST as $key => $value) {
if ($key == "two") {
// $result = Take $value and add it to the previous $value .",";
}
}
The goal I am trying to reach is how do I take the duplicate keys and add the previous value generated in the loop. For example: The solution would be $result = 2,2,
If you're POSTing the string in the question to your server, you would only see one value of two, not both. The 2nd one would overwrite the first value.
If you want multiple values for a key, you can make it an array by using [].
one=1&two[]=2&three=3&four=4&two[]=2
Now, $_POST['two'] will be an array (one, three and four will be strings).
This will not work. You get only the last value from POST, GET and REQUEST. You need to parse the $_SERVER['QUERY_STRING'], and if you parsed it, you can iterate your array:
foreach(explode('&',$_SERVER['QUERY_STRING']) as $k => $v)
{
$val = explode('=',$v);
$result[$val[0]] = isset($result[$val[0]]) ? $result[$val[0]].','.$val[1]:$val[1];
}
//initial data string
$string = "one=1&two=2&three=3&four=4&two=2";
$results = array();
$data = explode('&', $string);
foreach($data as $param) {
$query = explode('=', $param);
$key = $query[0];
$value = $query[1];
// check to see if the key has been seen before.
// if not, store it in an array for now.
if(!isset($results[$key])){
$results[$key] = array($value);
}
else{
// the key is a duplicate, store it in the array
$results[$key][] = $value;
}
}
// implode the arrays so that they're in the $result = "2,2" format
foreach($data as $key => $value){
$data[$key] = implode(',', $value);
}
Also its been mentioned, but if this is coming from a server post then you won't get duplicate keys.
=?
list($key, $value) = explode('=', $value). (I was trying to say you need to explode the equal sign. The question mark was because I was asking a question :-P)Bearing in mind Rocket's advice about multiple POSTed values, you could use implode() on any arrays that arrive:
foreach($_POST as $key=>$value)
{
if(is_array($value))
$_POST[$key]=implode(',',$value);
}
to get the string value that you seem to be after.
Store them as an array outside the foreach loop.
$keys = [];
foreach($_POST as $key => $value) {
if ($key == "two") {
$keys[] = $value;
}
}
return $keys
$keys = $_POST['two'] (this would be a string, not an array).
POSTed that to your server, you'd only see onetwo, you would not see both values.