如何將IF語句放在字符串中？

Question

如何將 IF 語句放在這樣的字符串中？

<?php echo
"<div class='portfolio-info'>
   <form id='imgtitle' class='kart' action='" . base_url() . "gallery/delete' method='post'>
      <input type = 'hidden' name='delete_file' value='$image' />

      //I want to put IF here
      <button type = 'submit' class='btn btn-danger'><i class='delete fa fa-trash fa-3x'></i></button>  
      //END here

    </form>
 </div>";
?>

Answer 1

嘗試這個。

<?php echo
"<div class='portfolio-info'>
   <form id='imgtitle' class='kart' action='" . base_url() . "gallery/delete' method='post'>
      <input type = 'hidden' name='delete_file' value='$image' />
";

if(expression)      //put IF here
{
    //put multiple statements if any
    echo "<button type = 'submit' class='btn btn-danger'><i class='delete fa fa-trash fa-3x'></i></button>  ";
}

echo "</form></div>";
?>

在此之后，請了解“如何使用 HTML 嵌入 PHP”

希望這對你有幫助。

Answer 2

您可以預先測試您的條件並將結果放入變量中。 如果條件失敗，只需將其等於空字符串即可。 這里使用三元運算符進行賦值。

<?php

$base_url  = '/';
$image     = "foo";
$condition = true;

$submit = $condition
    ? "<button type = 'submit' class='btn btn-danger'><i class='delete fa fa-trash fa-3x'></i></button>" 
    : '';

echo
"<div class='portfolio-info'>
   <form id='imgtitle' class='kart' action='${base_url}gallery/delete' method='post'>
      <input type = 'hidden' name='delete_file' value='$image' />
      $submit
    </form>
 </div>";

或者，您可以連接字符串並使用三元運算符。 但這可能會變得混亂。

<?php
echo
 "<div class='portfolio-info'>
   <form id='imgtitle' class='kart' action='${base_url}gallery/delete' method='post'>
      <input type = 'hidden' name='delete_file' value='$image' />
      " . ($condition ? "<button type = 'submit' class='btn btn-danger'><i class='delete fa fa-trash fa-3x'></i></button>" : ''). "
    </form>
 </div>";

你可以去掉括號，使用帶有逗號的 echo ：

<?php
echo
 "<div class='portfolio-info'>
   <form id='imgtitle' class='kart' action='${base_url}gallery/delete' method='post'>
      <input type = 'hidden' name='delete_file' value='$image' />",
      $condition ? "<button type = 'submit' class='btn btn-danger'><i class='delete fa fa-trash fa-3x'></i></button>" : '',
      "</form>
 </div>";

Answer 3

我解決了這個問題：

<?php
<div class='portfolio-info'>
   <form id='imgtitle' class='kart' action='" . base_url() . "gallery/delete' method='post'>
      <input type = 'hidden' name='delete_file' value='$image' />";?>
         <?php if($_SESSION['admin']==1):?>  
            <button type = 'submit' class='btn btn-danger'><i class='delete fa fa-trash fa-3x'></i></button>
          <?php endif; ?>
<?="</form>
</div>
?>