How to avoid repeating / elseif?

Question

I am creating small statistics, but I have a problem. I have a fish , a binding , a bait and a row from a database.

And I want to check all the possible options for this information. My code is as follows:

if ((isset($_SESSION['fish_id'])) && (isset($_SESSION['rig_id'])) && (isset($_SESSION['bait_id'])) && (isset($_SESSION['line_id']))) {

   echo '<img class="img-responsive" src="../assets/img/choose_fish.png">';
   echo '<div class="list-notes"> <ul> <li class="name">';
   echo 'FISH , RIG , BAIT , LINE';
   echo '</li></ul></div>';

} elseif ((isset($_SESSION['fish_id'])) && (isset($_SESSION['rig_id'])) && (isset($_SESSION['bait_id'])) && (!isset($_SESSION['line_id']))) {

   echo '<img class="img-responsive" src="../assets/img/choose_fish.png">';
   echo '<div class="list-notes"> <ul> <li class="name">';
   echo 'FISH , RIG , BAIT , *LINE*';
   echo '</li></ul></div>';

} elseif ((isset($_SESSION['fish_id'])) && (isset($_SESSION['rig_id'])) && (!isset($_SESSION['bait_id'])) && (isset($_SESSION['line_id']))) {

   echo '<img class="img-responsive" src="../assets/img/choose_fish.png">';
   echo '<div class="list-notes"> <ul> <li class="name">';
   echo 'FISH , RIG , *BAIT* , LINE';
   echo '</li></ul></div>';

} elseif ((isset($_SESSION['fish_id'])) && (!isset($_SESSION['rig_id'])) && (isset($_SESSION['bait_id'])) && (isset($_SESSION['line_id']))) {

   echo '<img class="img-responsive" src="../assets/img/choose_fish.png">';
   echo '<div class="list-notes"> <ul> <li class="name">';
    echo 'FISH , *RIG* , BAIT , LINE';
   echo '</li></ul></div>';

} ((!isset($_SESSION['fish_id'])) && (isset($_SESSION['rig_id'])) && (isset($_SESSION['bait_id'])) && (isset($_SESSION['line_id']))) {

   echo '<img class="img-responsive" src="../assets/img/choose_fish.png">';
   echo '<div class="list-notes"> <ul> <li class="name">';
   echo '*FISH* , RIG , BAIT , LINE';
   echo '</li></ul></div>';

}

Then I need to check if the installed the fish is not , and is not installed .. etc.

How can I avoid a repeat?

Answer 1

Fish, drilling rig, bait, line seem to be completely independent from each other, so the conditions can be applied separately to each of them.

?:, , if-else:

echo '<img class="img-responsive" src="../assets/img/choose_fish.png">';
echo '<div class="list-notes"> <ul> <li class="name">';

$items = array();
$items[] = isset($_SESSION['fish_id']) ? 'FISH' : '*FISH*';
$items[] = isset($_SESSION['rig_id']) ? 'RIG' : '*RIG*';
$items[] = isset($_SESSION['bait_id']) ? 'BAIT' : '*BAIT*';
$items[] = isset($_SESSION['line_id']) ? 'LINE' : '*LINE*';
echo join(' , ', $items);

echo '</li></ul></div>';

( , , , ):

echo '<img class="img-responsive" src="../assets/img/choose_fish.png">';
echo '<div class="list-notes"> <ul> <li class="name">';

$items = array();
foreach(array('fish', 'rig', 'bait', 'line') as $name) {
    $id = $name . '_id';
    $nameUppercased = strtoupper($name);
    $items[] = isset($_SESSION[$id]) ? $nameUppercased : "*$nameUppercased*";
}
echo join(' , ', $items);

echo '</li></ul></div>';

Answer 2

, . , ​​ , . , - , .

if ( (isset($_SESSION['fish_id']) ) 
     || (isset($_SESSION['rig_id']) ) 
     || (isset($_SESSION['bait_id']) ) 
     || (isset($_SESSION['line_id']) ) ) {

    $names = array();
    $names[] = isset($_SESSION['fish_id']) ? 'FISH' : '*FISH*';
    $names[] = isset($_SESSION['rig_id']) ? 'RIG' : '*RIG*';
    $names[] = isset($_SESSION['bait_id']) ? 'BAIT' : '*BAIT*';
    $names[] = isset($_SESSION['line_id']) ? 'LINE' : '*LINE*';

                    echo '<img class="img-responsive" src="../assets/img/choose_fish.png">';
                    echo '<div class="list-notes"> <ul> <li class="name">';
                    echo (string)implode(' , ', $names);
                    echo '</li></ul></div>';

}