mysql - Using for() loop to create unique PHP variables -

i have input form allows me insert new quiz database. form looks this:

 question title     question #1         is_correct_1         choice#1         is_correct_2         choice#2         is_correct_3         choice#3         is_correct_4         choice#4     question #2     .     .     . 

different quizzes having varying amounts of questions (although each question have 4 possibilities). determine how many questions have before form constructed. in order accomplish generate form using couple loops. initialize names of different input fields in same manner. see below:

// grab number of questions admin page     $num_of_qs = $_post['num_of_qs']; // produce form using loops     echo '<form method="post" action="' . $_server['php_self'] . '">';     echo '<fieldset><legend>new quiz details</legend><label for="title">quiz title</label>';     echo '<input type="text" id="title" name="title" value="" /><br /><br />';     ($i = 1; $i <= $num_of_qs; $i++) {         echo '<label for="question_'.$i.'">question #'.$i.'</label>';         echo '<input type="text" id="question_'.$i.'" name="question_'.$i.'" value="" /><br /><br />';         ($x = 1; $x <= 4; $x++) {             echo '<label for="is_correct_'.$i.'_'.$x.'">is_correct_'.$x.'</label>';             echo '<input type="text" id="is_correct_'.$i.'_'.$x.'" name="is_correct_'.$i.'_'.$x.'" value="" /><br />';             echo '<label for="choice_'.$i.'_'.$x.'">choice #'.$x.'</label>';             echo '<input type="text" id="choice_'.$i.'_'.$x.'" name="choice_'.$i.'_'.$x.'" value="" /><br /><br />';         }     }     echo '</fieldset><input type="hidden" name="num_of_qs" value="'.$num_of_qs.'" />';     echo '<input type="submit" value="create" name="create" /></form>'; 

so, variables end looking this:

$title $question_1 is_correct_1_1 choice_1_1  // first question, first choice is_correct_1_2 choice_1_2 // first question, second choice ... 

when go store variables grabbing using $_post function, i'm having trouble. here code:

// if user has submitted new quiz data     if (isset($_post['create'])) {         $num_of_qs = $_post['num_of_qs'];         $title = $_post['title'];         ($i = 1; $i <= $num_of_qs; $i++) {              $question_$i = $_post['question_'.$i.''];             ($x = 1; $x <= 4; $x++) {                 $is_correct_$i_$x = $_post['is_correct_'.$i.'_'.$x''];                 $choice_$i_$x = $_post['choice_'.$i.'_'.$x.''];             }         }         print_r($title);         print_r($question_1);          exit();     } 

i'm wondering if there way grab values form based on structure have determined variable names. specific problem lies in $question_$i = .... can salvage code or need rethink way naming these variables? thanks!

to answer question, can reference variables strings like

$var_1 = "hello"; echo ${"var_1"}; // or $str = "var_1"; echo $$str; 

but don't that

you want store these values in array.

$question[$i] = $_post['...']; $is_correct[$i][$x] = $_post['...'];