Php循环数组以隐藏“select”中的选项

Question

I having trouble with my array for my select. The option value is base from $a. What do i need to add in my code so that if $a has an equal value from $b, option will be hidden.

My array

$a = array("1","2","3","4","5","6");
$b = array("2","4","6");

Php

<select>
  <?php foreach ($a as $i) {?>
    <option> value="<?php echo $i; ?>" >
      <?php echo i?>
    </option>
  <?php } ?>
</select>

Answer 1

Try this -

 <select>
          <?php foreach ($a as $i) {
        if(!in_array($i, $b)) {  

        ?>
            <option> value="<?php echo $i; ?>" >
              <?php echo i?>
            </option>
          <?php }} ?>
        </select>