Moodle - 仅在首页显示图像

I am trying to display an image only on the front page of my Moodle.

Is there a way to detect where the user is, eg course page, profile page etc and use an if statment to display the picture only when the user is on the frontpage?

I am using a custom version of the Clean theme and I tried the code below.

When you are in a course it does not show the image, because the course with ID 1 is the frontpage, but it fails when you go to other pages, eg profile page.

<?php if ($PAGE->course->id == 1):?>
    <img src="<?php echo $OUTPUT->pix_url('header', 'theme'); ?>" class="img-responsive"/>

You can use the pagetype property in global $PAGE to check what page you are on

if (isset($PAGE) && (strpos($PAGE->pagetype, 'site-') === 0) {
    // I'm on the front page.
}

But you might be better off creating a front page layout. Edit theme/yourthemename/config.php and add (if its not there already)

$THEME->layouts = 
....
array(
    // The site home page.
    'frontpage' => array(
        'file' => 'frontpage.php',
        'regions' => array('side-pre', 'side-post'),
        'defaultregion' => 'side-pre',
        'options' => array('nonavbar' => true),
    ),
);

Then edit frontpage.php - if there isn't one then copy columns3.php to frontpage.php

Then you can have a custom frontpage :)