PHP: How to get keyless URL parameters -

i parameter in key such http://link.com/?parameter

i read somewhere key null , value parameter.

i tried $_get[null] didn't seem work.

here code:

if ($_get[null] == "parameter") {     echo 'invoked parameter.'; } else {     echo '..'; } 

it prints out .. means i'm not doing right. can please show me right way.

there no such things keyless url parameters in php. ?parameter equivalent of $_get['parameter'] being set empty string.

try doing var_dump($_get) url http://link.com/?parameter , see get.

it should this:

array (size=1) 'parameter' => string '' (length=0)

thus, can test in couple of ways depending on application needs:

if (isset($_get['parameter'])) {    // } else {    // else } 

or

// recommended if you're 100% sure 'parameter' in url. // otherwise throw undefined index error. isset() more reliable test.  if ($_get['parameter'] === '') {    // } else {    // else }