php - Accessing a user input field name that contains a space -

i have situation; know can print data query string this;

 <?  $firstname = $_get['firstname'];  echo $firstname;  ?> 

issue is, have form firstname , lastname fields space in name, this;

<input type="text" class="text" name="name (awf_first)" value=""  onfocus=" if (this.value == '') { this.value = ''; }" onblur="if (this.value == '') { this.value='';} " tabindex="500" /> <input id="awf_field-72073394-last" class="text" type="text" name="name (awf_last)" value=""  onfocus=" if (this.value == '') { this.value = ''; }" onblur="if (this.value == '') { this.value='';} " tabindex="501" /> 

so in situation need print first name , last name on success page of form submit. approach should use?

i tired these 2 things didn't worked;

$firstname = $_get['name%20(awf_first)']; echo $firstname; 

and second approach

 $firstname = urldecode($_get['name (awf_first)']);  echo $firstname; 

please note, not possible remove space names of input on form.

thanks,

instead of %20 use _. code be

$firstname = urldecode($_get['name_(awf_first)']); echo $firstname;