How add class='active' to html menu with php_问答_开发者

I want to put my html navigation in a separate php file so when I need to edit it, I only have to edit it once. The problem starts when I want to add the class active to the active page.

I've got three pages and one common file.

commo开发者_运维百科n.php :

<?php 
$nav = <<<EOD
   <div id="nav">
        <ul>
           <li><a <? if($page == 'one'): ?> class="active"<? endif ?> href="index.php">Tab1</a>/</li>
           <li><a href="two.php">Tab2</a></li>
           <li><a href="three.php">Tab3</a></li>
       </ul>
    </div>
EOD;
?>

index.php : All three pages are identical except their $page is different on each page.

  <?php
     $page = 'one';      
     require_once('common.php');
    ?>
    <html>
       <head></head>
       <body>
          <?php echo $nav; ?>
       </body>
    </html>

This simply won't work unless I put my nav on each page, but then the whole purpose of separating the nav from all pages is ruined.

Is what I want to accomplish even possible? What am I doing wrong?

Thanks

EDIT: When doing this, the php code inside the li don't seem to run, it's just being printed as if it was html

why don't you do it like this:

in the pages:

<html>
   <head></head>
   <body>
      <?php $page = 'one'; include('navigation.php'); ?>
   </body>
</html>

in the navigation.php

<div id="nav">
   <ul>
      <li>
          <a <?php echo ($page == 'one') ? "class='active'" : ""; ?> 
                 href="index1.php">Tab1</a>/</li>
      <li>
          <a <?php echo ($page == 'two') ? "class='active'" : ""; ?> 
                  href="index2.php">Tab2</a>/</li>
      <li>
          <a <?php echo ($page == 'three') ? "class='active'" : ""; ?> 
                  href="index3.php">Tab3</a>/</li>
   </ul>
</div>

You will actually be able to control where in the page you are putting the navigation and what parameters you are passing to it.

Later edit: fixed syntax error.

A very easy solution to this problem is to do this.

<ul>
  <li class="<?php if(basename($_SERVER['SCRIPT_NAME']) == 'index.php'){echo 'current'; }else { echo ''; } ?>"><a href="index.php">Home</a></li>
  <li class="<?php if(basename($_SERVER['SCRIPT_NAME']) == 'portfolio.php'){echo 'current'; }else { echo ''; } ?>"><a href="portfolio.php">Portfolio</a></li>
  <li class="<?php if(basename($_SERVER['SCRIPT_NAME']) == 'services.php'){echo 'current'; }else { echo ''; } ?>"><a href="services.php">Services</a></li>
  <li class="<?php if(basename($_SERVER['SCRIPT_NAME']) == 'contact.php'){echo 'current'; }else { echo ''; } ?>"><a href="contact.php">Contact</a></li>
  <li class="<?php if(basename($_SERVER['SCRIPT_NAME']) == 'links.php'){echo 'current'; }else { echo ''; } ?>"><a href="links.php">Links</a></li>
</ul>

Which will output

<ul>
  <li class="current"><a href="index.php">Home</a></li>
  <li class=""><a href="portfolio.php">Portfolio</a></li>
  <li class=""><a href="services.php">Services</a></li>
  <li class=""><a href="contact.php">Contact</a></li>
  <li class=""><a href="links.php">Links</a></li>
</ul>

Your index.php code is correct. I am including the updated code for common.php below then I will explain the differences.

<?php 
     $class = ($page == 'one') ? 'class="active"' : '';
     $nav = <<<EOD
        <div id="nav">
            <ul>
               <li><a $class href="index.php">Tab1</a>/</li>
               <li><a href="two.php">Tab2</a></li>
               <li><a href="three.php">Tab3</a></li>
           </ul>
        </div>
 EOD;
 ?>

The first issue is that you need to make sure that the end declaration for your heredoc -- EOD; -- is not indented at all. If it is indented, then you will get errors.

As for your issue with the PHP code not running within the heredoc statement, that is because you are looking at it wrong. Using a heredoc statement is not the same as closing the PHP tags. As such, you do not need to try reopening them. That will do nothing for you. The way the heredoc syntax works is that everything between the opening and closing is displayed exactly as written with the exception of variables. Those are replaced with the associated value. I removed your logic from the heredoc and used a tertiary function to determine the class to make this easier to see (though I don't believe any logical statements will work within the heredoc anyway)

To understand the heredoc syntax, it is the same as including it within double quotes ("), but without the need for escaping. So your code could also be written like this:

<?php 
     $class = ($page == 'one') ? 'class="active"' : '';
     $nav = "<div id=\"nav\">
            <ul>
               <li><a $class href=\"index.php\">Tab1</a>/</li>
               <li><a href=\"two.php\">Tab2</a></li>
               <li><a href=\"three.php\">Tab3</a></li>
           </ul>
        </div>";
 ?>

It will do exactly the same thing, just is written somewhat differently. Another difference between heredoc and the string is that you can escape out of the string in the middle where you can't in the heredoc. Using this logic, you can produce the following code:

<?php 
     $nav = "<div id=\"nav\">
            <ul>
               <li><a ".(($page == 'one') ? 'class="active"' : '')." href=\"index.php\">Tab1</a>/</li>
               <li><a href=\"two.php\">Tab2</a></li>
               <li><a href=\"three.php\">Tab3</a></li>
           </ul>
        </div>";
 ?>

Then you can include the logic directly in the string like you originally intended.

Whichever method you choose makes very little (if any) difference in the performance of the script. It mostly boils down to preference. Either way, you need to make sure you understand how each works.

I think you need to put your $page = 'one'; above the require_once.. otherwise I don't understand the question.

Why don't you create a function or class for this navigation and put there active page as a parameter? This way you'd call it as, for example:

$navigation = new Navigation( 1 );

$navigation = navigation( 1 );

I know this is old, but none of these answers are very good (sry ppl)

The BEST way to do it (without writing out convoluted classes) is to compare the current $_SERVER['REQUEST_URI'] to the href of the link. You're almost there.

Try this. (Taken from http://ma.tt/scripts/intellimenu/)

$nav = <<<EOD
<div id="nav">
        <ul>
           <li><a href="index.php">Tab1</a></li>
           <li><a href="two.php">Tab2</a></li>
           <li><a href="three.php">Tab3</a></li>
       </ul>
    </div>
EOD;

$lines = explode("\n", $nav);
foreach($lines as $line)
{
    if(preg_match('/href="([^"]+)"/', $line, $url)) {
        if(substr($_SERVER['REQUEST_URI'], 0, 5) == substr($url[1], 0, 5)) {
            $line = str_replace('><a', ' class="current-menu-item"><a', $line);
        }
    }
    echo $line . "\n";
}

$page='one' should occur before you require_once() not after. After is too late- the code has already been required, and $nav has already been defined.
You should use include('header.php'); and include('footer.php'); instead of setting a $nav variable early on. That increases flexibility.

Make more functions. Something like this really makes things easier to follow:

function maybe($x,$y){return $x?$y:'';}
function aclass($k){return " class=\"$k\" "; }

then you can write your "condition" like this:

<a href="..." <?= maybe($page=='one',aclass('active')) ?>> ....

You could use this PHP, hope it helps.

<?php if(basename($_SERVER['PHP_SELF'], '.php') == 'home' ) { ?> class="active" <?php } else { ?> <?php }?>

So a list would be like the below.

<ul>
  <li <?php if( basename($_SERVER['PHP_SELF'], '.php') == 'home' ) { ?> class="active" <?php } else { ?> <?php }?>><a href="home"><i class="fa fa-dashboard"></i> <span>Home</span></a></li>
  <li <?php if( basename($_SERVER['PHP_SELF'], '.php') == 'listings' ) { ?> class="active" <?php } else { ?> <?php }?>><a href="other"><i class="fa fa-th-list"></i> <span>Other</span></a></li>
</ul>

CALL common.php
<style>
    .ddsmoothmenu ul li{float: left; padding: 0 20px;}
    .ddsmoothmenu ul li a{display: block;
  padding: 40px 15px 20px 15px;
  color: #4b4b4b;
  font-size: 13px;
  font-family: 'Open Sans', Arial, sans-serif;
  text-align: right;
  text-transform: uppercase;
  margin-left: 1px; color: #fff; background: #000;}
    .current .test{  background: #2767A3; color: #fff;}
</style>
<div class="span8 ddsmoothmenu">
<!-- // Dropdown Menu // -->
<ul id="dropdown-menu" class="fixed">
    <li class="<?php if(basename($_SERVER['SCRIPT_NAME']) == 'index.php'){echo 'current'; }else { echo ''; } ?>"><a href="index.php" class="test">Home  <i>::</i> <span>welcome</span></a></li>
    <li class="<?php if(basename($_SERVER['SCRIPT_NAME']) == 'about.php'){echo 'current'; }else { echo ''; } ?>"><a href="about.php" class="test">About us <i>::</i> <span>Who we are</span></a></li>
    <li class="<?php if(basename($_SERVER['SCRIPT_NAME']) == 'course.php'){echo 'current'; }else { echo ''; } ?>"><a href="course.php">Our Courses  <i>::</i> <span>What we do</span></a></li>
</ul><!-- end #dropdown-menu -->

</div><!-- end .span8 -->

add each page
<?php include('common.php'); ?>

             <ul>

                <li><a <?php echo ($page == "yourfilename") ? "class='active'" : ""; ?> href="user.php" ><span>Article</span></a></li>
                <li><a <?php echo ($page == "yourfilename") ? "class='active'" : ""; ?> href="newarticle.php"><span>New Articles</span></a></li>

                </ul>

The solution i'm using is as follows and allows you to set the active class per php page.

Give each of your menu items a unique class, i use .nav-x (nav-about, here).

<li class="nav-item nav-about"> <a class="nav-link" href="about.php">About</a> </li>

At the top of each page (about.php here):

<!-- Navbar Active Class -->
<?php $activeClass = '.nav-about > a'; ?>

Elsewhere (header.php / index.php):

<style>
<?php echo $activeClass; ?> {
    color: #fff !important;
}
</style>

Simply change the .nav-about > a per page, .nav-forum > a, for example.

If you want different styling (colors etc) for each nav item, just attach the inline styling to that page instead of the index / header page.

seperate your page from nav bar.

pageOne.php:

$page="one";
include("navigation.php");

navigation.php

if($page=="one"){$oneIsActive = 'class="active"';}else{ $oneIsActive=""; }
if($page=="two"){$twoIsActive = 'class="active"';}else{ $twoIsActive=""; }
if($page=="three"){$threeIsActive = 'class="active"';}else{ $threeIsActive=""; }

<ul class="nav">
  <li <?php echo $oneIsActive; ?>><a href="pageOne.php">One</a></li>
  <li <?php echo $twoIsActive; ?>><a href="pageTwo.php"><a href="#">Page 2</a></li>
  <li <?php echo $threeIsActive; ?>><a href="pageThree.php"><a href="#">Page 3</a></li>
</ul>

I found that I could also set the title of my pages with this method as well.

 $page="one";
 $title="This is page one."
 include("navigation.php");

and just grab the $title var and put it in between the "title" tags. Though I am sending it to my header page above my nav bar.

<a href="store/index" <?php if($_SERVER['REQUEST_URI'] == '/store/index') { ?>class="active"<?php } ?> > Link </a>
<a href="account/referral" <?php if($_SERVER['REQUEST_URI'] == '/account/referral') { ?>class="active"<?php } ?> > Link </a>

PHP code

      <?php 
  function activeClass($chkStr){
     // echo "testing data";
     // echo strlen($_SERVER['REQUEST_URI']);
     if($chkStr=="home" && strlen($_SERVER['REQUEST_URI'])<3){
        return "active";
     }
     
     if (stripos($_SERVER['REQUEST_URI'], $chkStr)!==false){
        return "active";
     }
     else{
        return "";
     }

  }

  ?>

HTML CODE :

  <ul class="navbar-nav">
                       <li class="nav-item <?php echo activeClass("home"); ?>">
                          <a class="nav-link txt" href="/">Home <span class="sr-only">(current)</span></a>
                       </li>
                       <li class="nav-item  <?php echo activeClass("about-us.php"); ?>">
                          <a class="nav-link txt" href="about-us.php">About Us</a>
                       </li>
                       <li class="nav-item  <?php echo activeClass("services.php"); ?>">
                          <a class="nav-link txt" href="services.php">Services</a>
                       </li>
                       <li class="nav-item  <?php echo activeClass("our-team.php"); ?>">
                          <a class="nav-link txt" href="our-team.php">Our team</a>
                       </li>
                       <li class="nav-item  <?php echo activeClass("media-awards.php"); ?>">
                          <a class="nav-link txt" href="media-awards.php">Media & Awards</a>
                       </li>
                       <li class="nav-item  <?php echo activeClass("blog.php"); ?>">
                          <a class="nav-link txt" href="blog.php">Blog</a>
                       </li>
                       <li class="nav-item  <?php echo activeClass("contact-us.php"); ?>">
                          <a class="nav-link txt" href="contact-us.php">Contact Us</a>
                       </li>

                    </ul>