Question

我有以下PHP代码：

function button1($attr, $text) {
  $data = "<button ";

  foreach($attr as $names => $specs) {
    $data .= $names . "='" . $specs . "' ";
  }

  $data .= ">" . $text . "</button>\n";
  echo $data;
}

function span1($attr, $text) {
  $data = "<span ";

  foreach($attr as $names => $specs) {
    $data .= $names . "='" . $specs . "' ";
  }

  $data .= ">" . $text . "</span>\n";
  echo $data;
}

button1(
  array( "type" => "button",
         "class" => "navbar-toggle",
         "data-toggle" => "collapse",
         "data-target" => ".navbar-collapse"
  ),
  span1(
    array( "class" => "sr-only" ),
    "Toggle navigation"
  )
);

从上面的代码中，我希望结果如下所示：

<button type='button' class='navbar-toggle' data-toggle='collapse' data-target='.navbar-collapse' >
  <span class='sr-only' >Toggle navigation</span>
</button>

但它看起来像这样：

<span class='sr-only' >Toggle navigation</span>
<button type='button' class='navbar-toggle' data-toggle='collapse' data-target='.navbar-collapse' ></button>

我必须做些什么才能得到我想要的结果？谢谢你的帮助。

Answer 1

简单，从不 echo来自各种功能。问题是，首先评估span1()，导致其echo执行。它也不返回任何用作button1() $text参数的内容。然后执行button1() echo，将其内容打印到输出流 span1()回显之后。

将每个功能的最后一行更改为

return $data;

并通过

执行

echo button1(...);

Answer 2

用这个替换你的PHP代码，您必须return $data进入函数并回显button1（）;

<?php 

function button1($attr, $text) {
  $data = "<button ";

  foreach($attr as $names => $specs) {
    $data .= $names . "='" . $specs . "' ";
}

  $data .= ">" . $text . "</button>\n";
return $data;
}

function span1($attr, $text) {
  $data = "<span ";

  foreach($attr as $names => $specs) {
    $data .= $names . "='" . $specs . "' ";
  }

  $data .= ">" . $text . "</span>\n";
  return $data;
}

echo button1(
  array( "type" => "button",
         "class" => "navbar-toggle",
         "data-toggle" => "collapse",
         "data-target" => ".navbar-collapse" ),
  span1(
    array( "class" => "sr-only" ),
    "Toggle navigation"
  )
);

Answer 3

您好在下面的代码中使用您想要的输出 function button1（$ attr，$ text） { $ data =＆＃34;

    foreach($attr as $names => $specs) 
    {
         $data .= $names . "='" . $specs . "' ";
    }

    $data .= ">" . $text . "</button>\n";
    return $data;
}

function span1($attr, $text) 
{
     $data = "<span ";

     foreach($attr as $names => $specs) 
     {
          $data .= $names . "='" . $specs . "' ";
     }

     $data .= ">" . $text . "</span>\n";
     return $data;
}

$str = span1(
         array( "class" => "sr-only" ),
                "Toggle navigation"
        );

echo button1（数组（＆＃34;类型＆＃34; =＆gt;＆＃34;按钮＆＃34;，＆＃34;类＆＃34; =＆GT; ＆＃34;导航栏肘节＆＃34 ;, ＆＃34;数据肘节＆＃34; =＆GT; ＆＃34;崩＆＃34 ;, ＆＃34;数据目标＆＃34; =＆GT; ＆＃34; .navbar合拢＆＃34; ） $海峡）;

echo函数里面的函数bug

3 个答案: