how to get POST parameters from URL in PHP [duplicate] - php

Question

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' =>
)

Answer 1

You want the parse_str function, and you need to set the second parameter to have the data put in an array instead of into individual variables.
$get_string = "pg_id=2&parent_id=2&document&video";
parse_str($get_string, $get_array);
print_r($get_array);

Answer 2

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 );

Answer 3

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

Answer 4

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' =>
)

Answer 5

Use http://us1.php.net/parse_str
Attention, its usage is:
parse_str($str, &$array);
not
$array = parse_str($str);
Please note that the above only applies to PHP version 5.3 and earlier. Call-time pass-by-reference has been removed in PHP 5.4.

Answer 6

There are several possible methods, but for you, there is already a built-in parse_str function:
$array = array();
parse_str($string, $array);
var_dump($array);

Answer 7

This is a one-liner for parsing a query from the current URL into an array:
parse_str($_SERVER['QUERY_STRING'], $query);

Answer 8

You can try this code:
<?php
$str = "pg_id=2&parent_id=2&document&video";
$array = array();
parse_str($str, $array);
print_r($array);
?>
Output:
Array
(
[pg_id] => 2
[parent_id] => 2
[document] =>
[video] =>
)

Answer 9

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);

Answer 10

But PHP already comes with a built in $_GET function. this will convert it to the array by itself.
try print_r($_GET) and you will get the same results.

Answer 11

This is the PHP code to split a query in MySQL and SQL Server:
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

Answer 12

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!