[php] Parse query string into an array

How can I turn a string below into an array?

pg_id=2&parent_id=2&document&video 

This is the array I am looking for,

array(
    'pg_id' => 2,
    'parent_id' => 2,
    'document' => ,
    'video' =>
)

Sometimes parse_str() alone is note accurate, it could display for example:

$url = "somepage?id=123&lang=gr&size=300";

parse_str() would return:

Array ( 
    [somepage?id] => 123 
    [lang] => gr 
    [size] => 300 
)

It would be better to combine parse_str() with parse_url() like so:

$url = "somepage?id=123&lang=gr&size=300";
parse_str( parse_url( $url, PHP_URL_QUERY), $array );
print_r( $array );

For this specific question the chosen answer is correct but if there is a redundant parameter—like an extra "e"—in the URL the function will silently fail without an error or exception being thrown:

a=2&b=2&c=5&d=4&e=1&e=2&e=3 

So I prefer using my own parser like so:

//$_SERVER['QUERY_STRING'] = `a=2&b=2&c=5&d=4&e=100&e=200&e=300` 

$url_qry_str  = explode('&', $_SERVER['QUERY_STRING']);

//arrays that will hold the values from the url
$a_arr = $b_arr = $c_arr = $d_arr = $e_arr =  array();

foreach( $url_qry_str as $param )
    {
      $var =  explode('=', $param, 2);
      if($var[0]=="a")      $a_arr[]=$var[1];
      if($var[0]=="b")      $b_arr[]=$var[1];
      if($var[0]=="c")      $c_arr[]=$var[1];
      if($var[0]=="d")      $d_arr[]=$var[1];
      if($var[0]=="e")      $e_arr[]=$var[1];
    }

    var_dump($e_arr); 
    // will return :
    //array(3) { [0]=> string(1) "100" [1]=> string(1) "200" [2]=> string(1) "300" } 

Now you have all the occurrences of each parameter in its own array, you can always merge them into one array if you want to.

Hope that helps!

Using parse_str().

$str = 'pg_id=2&parent_id=2&document&video';
parse_str($str, $arr);
print_r($arr);

This is one-liner for parsing query from current URL into array:

parse_str($_SERVER['QUERY_STRING'], $query);

This is the PHP code to split query in mysql & mssql

enter code here
function splitquery($strquery)
{
$arrquery=explode('select',$strquery);

$stry='';$strx='';

for($i=0;$i<count($arrquery);$i++)
{
if($i==1)
{
    echo 'select '.trim($arrquery[$i]);
}
elseif($i>1)
{

$strx=trim($arrquery[($i-1)]);

    if(trim(substr($strx,-1))!='(')
    {
        $stry=$stry.'

select '.trim($arrquery[$i]);
    }
    else
    {
        $stry=$stry.trim('select '.trim($arrquery[$i]));
    }

$strx='';
}
} 

return $stry;
}

Example:

Query before

select xx from xx select xx,(select xx) from xx where y=' cc' select xx from xx left join ( select xx) where (select top 1 xxx from xxx) oder by xxx desc ";

Query after

select xx from xx

select xx,(select xx) from xx where y=' cc'

select xx from xx left join (select xx) where (select top 1 xxx from xxx) oder by xxx desc

Thank you, from Indonesia Sentrapedagang.com

There are several possible methods, but for you, there is already a builtin parse_str function

$array = array();
parse_str($string, $array);
var_dump($array);

Use http://us1.php.net/parse_str

Attention, it's usage is:

parse_str($str, &$array);

not

$array = parse_str($str);

If you're having a problem converting a query string to an array because of encoded ampersands

&

then be sure to use html_entity_decode

Example:

// Input string //
$input = 'pg_id=2&parent_id=2&document&video';

// Parse //
parse_str(html_entity_decode($input), $out);

// Output of $out //
array(
  'pg_id' => 2,
  'parent_id' => 2,
  'document' => ,
  'video' =>
)

You can use the PHP string function parse_str() followed by foreach loop.

$str="pg_id=2&parent_id=2&document&video";
parse_str($str,$my_arr);
foreach($my_arr as $key=>$value){
  echo "$key => $value<br>";
}
print_r($my_arr);