Manipulate a url string by adding GET parameters

Question

I want to add GET parameters to URLs that may and may not contain GET parameters without repeating ? or &.

Example:

If I want t

Answer 1

$data = array('foo'=>'bar',
              'baz'=>'boom',
              'cow'=>'milk',
              'php'=>'hypertext processor');

$queryString =  http_build_query($data);
//$queryString = foo=bar&baz=boom&cow=milk&php=hypertext+processor

echo 'http://domain.com?'.$queryString;
//output: http://domain.com?foo=bar&baz=boom&cow=milk&php=hypertext+processor

Answer 2

Example with updating existent parameters.

Also url_encode used, and possibility to don't specify parameter value

    <?
    /**
     * Add parameter to URL
     * @param string $url
     * @param string $key
     * @param string $value
     * @return string result URL
     */
    function addToUrl($url, $key, $value = null) {
        $query = parse_url($url, PHP_URL_QUERY);
        if ($query) {
            parse_str($query, $queryParams);
            $queryParams[$key] = $value;
            $url = str_replace("?$query", '?' . http_build_query($queryParams), $url);
        } else {
            $url .= '?' . urlencode($key) . '=' . urlencode($value);
        }
        return $url;
    }

Answer 3

 /**
 * @example addParamToUrl('/path/to/?find=1', array('find' => array('search', 2), 'FILTER' => 'STATUS'))
 * @example addParamToUrl('//example.com/path/to/?find=1', array('find' => array('search', 2), 'FILTER' => 'STATUS'))
 * @example addParamToUrl('https://example.com/path/to/?find=1&FILTER=Y', array('find' => array('search', 2), 'FILTER' => 'STATUS'))
 *
 * @param       $url string url
 * @param array $addParams
 *
 * @return string
 */
function addParamToUrl($url, array $addParams) {
  if (!is_array($addParams)) {
    return $url;
  }

  $info = parse_url($url);

  $query = array();

  if ($info['query']) {
    parse_str($info['query'], $query);
  }

  if (!is_array($query)) {
    $query = array();
  }

  $params = array_merge($query, $addParams);

  $result = '';

  if ($info['scheme']) {
    $result .= $info['scheme'] . ':';
  }

  if ($info['host']) {
    $result .= '//' . $info['host'];
  }

  if ($info['path']) {
    $result .= $info['path'];
  }

  if ($params) {
    $result .= '?' . http_build_query($params);
  }

  return $result;
}

Answer 4

<?php
$url1 = '/test?a=4&b=3';
$url2 = 'www.baidu.com/test?a=4&b=3&try_count=1';
$url3 = 'http://www.baidu.com/test?a=4&b=3&try_count=2';
$url4 = '/test';
function add_or_update_params($url,$key,$value){
    $a = parse_url($url);
    $query = $a['query'] ? $a['query'] : '';
    parse_str($query,$params);
    $params[$key] = $value;
    $query = http_build_query($params);
    $result = '';
    if($a['scheme']){
        $result .= $a['scheme'] . ':';
    }
    if($a['host']){
        $result .= '//' . $a['host'];
    }
    if($a['path']){
        $result .=  $a['path'];
    }
    if($query){
        $result .=  '?' . $query;
    }
    return $result;
}
echo add_or_update_params($url1,'try_count',1);
echo "\n";
echo add_or_update_params($url2,'try_count',2);
echo "\n";
echo add_or_update_params($url3,'try_count',3);
echo "\n";
echo add_or_update_params($url4,'try_count',4);
echo "\n";

Answer 5

I think you should do it something like this.

class myURL {
    protected $baseURL, $requestParameters;

    public function __construct ($newURL) {
        $this->baseurl = $newURL;
        $this->requestParameters = array();
    }

    public function addParameter ($parameter) {
        $this->requestParameters[] = $parameter;
    }

    public function __toString () {
        return $this->baseurl.
               ( count($this->requestParameters) ?
                 '?'.implode('&', $this->requestParameters) :
                 ''
                 );
    }
}

$url1 = new myURL ('http://www.acme.com');
$url2 = new myURL ('http://www.acme.com');
$url2->addParameter('sort=popular');
$url2->addParameter('category=action');
$url1->addParameter('category=action');

echo $url1."\n".$url2;

Answer 6

$parameters = array();

foreach ($get as $key => $value)
{
     $parameters[] = $key.'='.$value;
}

$url = 'http://example.com/movies?'.implode('&', $parameters);