php - Is it possible to get empty array value via $_GET? -

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is possible empty array(array 0 items) value via $_get?

is possible direct value setting?

count($_get['param'])==0

you need empty value url = myform.php?param=&param2=

in form let value blank:

<input type='text' name='param' value ='' />

for empty array:

url: myform.php?param[]=&param2[some_key]=

in form: <input type='text' name='param[]' value ='' />

from ajax: (i remember anti-intuitive , hard search for):

ajax{     ...     data: {'params[]':'','params2[some_key]':''} }

workaround: edit back-end , if there no data params or not array (null, empty whatever ..) assign empty string it:

$param = (isset($_get['param']) && is_array($_get['param']))? $_get['param'] : array();

update:
did few tests , seems there no way put "nothing" in request ussing form or ajax.
0, '', null valid values $_get empty array not created. answer question, not possible empty array value front-end.

there few options edit $_get manually in back-end:

<?php     if(!isset($_get['param']) || !$_get['param']){ //not set or (null,0,"")         $_get['param'] = array();     }     if(count($_get['param'])==0){...}; // 0 if no 'param' provided.

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