How to get array values if checked or not one by one on a form?

I have a simple form, i would like to get all array values one by one and print on PHP. I'll be so happy if you help me.

<php
if(isset($_POST['submit'])){
    if(!isset($error)){
    try {

                if($_POST['mod_[1]']=="1"){
                    $mod_1 = '1';
                    $mod_1_symbol = "✓";
                }else{
                    $mod_1 = '0';
                    $mod_1_symbol = "X";
                }

                if($_POST['mod_[2]']=="1"){
                    $mod_2 = '1';
                    $mod_2_symbol = "✓";
                }else{
                    $mod_2 = '0';
                    $mod_2_symbol = "X";
                }

                if($_POST['mod_[3]']=="1"){
                    $mod_3 = '1';
                    $mod_3_symbol = "✓";
                }else{
                    $mod_3 = '0';
                    $mod_3_symbol = "X";
                }

                if($_POST['mod_[4]']=="1"){
                    $mod_4 = '1';
                    $mod_4_symbol = "✓";
                }else{
                    $mod_4 = '0';
                    $mod_4_symbol = "X";
                }

                if($_POST['mod_[5]']=="1"){
                    $mod_5 = '1';
                    $mod_5_symbol = "✓";
                }else{
                    $mod_5 = '0';
                    $mod_5_symbol = "X";
                }
}catch(PDOException $e) {
            $error[] = $e->getMessage();
        }
    }
}
?>

<form role="form" method="post" action="" enctype="multipart/form-data" class="contact-form">
<input type="checkbox" id="mod_1" name="mod_[]" value="1" />
<input type="checkbox" id="mod_1" name="mod_[]" value="1" />
<input type="checkbox" id="mod_1" name="mod_[]" value="1" />
<input type="checkbox" id="mod_1" name="mod_[]" value="1" />
<input type="checkbox" id="mod_1" name="mod_[]" value="1" />
<input name="submit" type="submit" value="Send">
</form>

i need to get some thing like this: if mod_[1] checked write 1 else 0;

if mod_[2] checked write 1 else 0;

Something like this.