Weird issue with verifying variable in PHP -

i have code supposed check if page doesn't exist, or if contains shouldn't, , reason it's throwing error @ me, more 406, if go page other home page ($_get = "").

here's code , in advance :)

$currentpage = $_get['a']; $pages[1] = ""; $pages[2] = "help"; $pages[3] = "work"; $pages[4] = "download"; $pages[5] = "process"; $pages[6] = "safariex"; $pages[7] = "services";  if(isset($_get) && !ctype_alpha($_get) && $_get['a'] != ""){     header("location: http://pattersoncode.ca/error.php?ec=406");  } if (!ctype_alpha($_get['a']) && $_get['a'] != "") {     header("location: http://pattersoncode.ca/error.php?ec=406"); } if ( ! in_array( $currentpage, $pages ) ) {  header("location: http://pattersoncode.ca/error.php?ec=404"); } 

i believe wrong:

!ctype_alpha($_get) 

$_get array, not string. ctype_alpha($_get) equal false.

you want instead:

if(!isset($_get["a"]) || !ctype_alpha($_get["a"])) {     header("location: http://pattersoncode.ca/error.php?ec=406");     exit(); } 

which should take care of both 406 conditions.

in cases want exit() when redirect.

if possible better send actual http response code rather redirect:

header('http/1.1 406 not acceptable', true, 406);