Redirecting a page to itself minus a query string

[indepthmedia]

Ok, I have started the following code but I don't know how to strip out the query string...

<?php $query = $_GET['query'];
$oldurl = echo $_SERVER['PHP_SELF']; //For example: http://www.mysite.com/currentpage.php?query=whatever
if ($query != '') { 
    $newurl = $oldurl; //BUT REMOVING THE QUERYSTRING - How do I do this?
    Header( "HTTP/1.1 301 Moved Permanently" ); 
    Header( "Location: $newurl" ); 
}    
?>

[byron3@earthlink]

Use the parse_url() function . Documentation @ :
http://www.php.net/manual/en/function.parse-url.php

[indepthmedia]

thank you, but what if I have 2 parameters in the url but I only want to remove 1?

For ex. http://www.mysite.com/currentpage.ph...2=whateverelse

but I only wanted to strip out "query=whatever"

[byron3@earthlink]

Same function, just retrieve the query array. Concatenate the path and 1st query parameter and you are in business again.

[logic_earth]

<?php

header('content-type: text/plain');

$s = 'http://example.com/path/to/file.ext?query=a&query2=b&mew=mew';
list ($s, $q) = explode('?', $s);
parse_str($q, $q);

unset($q['query']);

# New Url:
print $s . '?' . http_build_query($q, '', '&');
# http://example.com/path/to/file.ext?query2=b&mew=mew

?>

Weeeeeee

[Chemo]

    /**
     * Retrieve $_GET params filtered by string or array exclusion list
     * @author Bobby Easland 
     * @version 1.0
     * @param mixed $exclude Exclusion list as either string or array
     * @param boolean $asString Flag to either return as string or array
     * @return mixed
     */    
    function getParamsFiltered($exclude, $asString = true){
        if ( empty($_GET) ){
            return ( $asString === true ) ? '' : array();
        }
        switch(gettype($exclude)){
            case 'string':
                if ( !array_key_exists($exclude, $_GET) ){
                    return ( $asString === true ) ? implodeAssoc($_GET) : $_GET; 
                }
                $return = array();
                foreach ( array_keys($_GET) as $key ){
                    if ( $key == $exclude ) continue;
                    $return[$key] = $_GET[$key];
                }
                if ( count($return) < 1 ){
                    return ( $asString === true ) ? '' : array();
                }
                return ( $asString === true ) ? implodeAssoc($return) : $return;
                break;
            case 'array':
                $diff = array_diff(array_keys($_GET), $exclude);
                if ( count($diff) < 1 ){
                    return ( $asString === true ) ? '' : array();
                }
                $return = array();
                foreach( array_values($diff) as $key ){
                    $return[$key] = $_GET[$key];
                }
                return ( $asString === true ) ? implodeAssoc($return) : $return;
                break;
            default:
                return ( $asString === true ) ? '' : array();
                break;
        }                
    } # end function

    /**
     * Implode array associatively, back port of simple array http_build_query
     * @author Bobby Easland 
     * @version 1.0
     * @param array $array Associative array to be imploded
     * @param string $innerGlue Inner glue
     * @param string $outerGlue Outer glue
     * @return string
     */    
    function implodeAssoc($array, $innerGlue='=', $outerGlue='&') {
        if ( !is_array($array) ){
            return '';
        }
        $output = array();
        foreach( $array as $key => $item ){
            $output[] = trim($key) . $innerGlue . trim($item);
        }
        return implode($outerGlue, $output);
    } # end function 

To use the code save the functions in either a library or other common included file. Here is an example of use:

    /**
     * Test URL = http://www.domain.com/script.php?var1=123&var2=456&var3=789
     */
     
    // String input, single filter
    echo getParamsFiltered('var1'); // Outputs var2=456&var3=789
    
    // Array input, single filter
    echo getParamsFiltered(array('var1')); // Outputs var2=456&var3=789
    
    // Array input, multiple filters
    echo getParamsFiltered(array('var1', 'var3')); // Outputs var2=456 

Enjoy!

Bobby

[logic_earth]

Interesting function Chemo but it is not very scalable being restricted to $_GET only and a little too complex. Not to mention not so good on performance.

<?php

header('content-type: text/plain');

# ($sourceArray, string|array $delete1 [, [$detele...])
function filter_keys () {

    if (func_num_args() < 2) { return; }

    $args   = func_get_args();
    $source = array_shift($args);

    for ($i = 0, $l = count($args); $i < $l; $i++) {

        $tmp = $args[$i];

        if (is_array($tmp)) {
            foreach ($tmp as $k) {
                unset($source[$k]);
            }
        } else {
            unset($source[$tmp]);
        }

    }

    return $source;

}

$data = array('remove' => 'sometext', 'keep' => 'moretext', 'gone' => 225, 'stay' => 556, 'test' => 78787);

print_r($data);

$data = filter_keys($data, 'remove', 'gone', 'test');

print_r($data);