Check if is on child-page of a particular page

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I am trying to output a logo depending on which page is being viewed.

<?php if ( is_page('home') || is_page('services') ) { ?>
    <div class="col-md-2 col-sm-4">
        <?php ci_e_logo('<h1 class="logo ' . get_logo_class() . '">', '</h1>'); ?>
    </div>
<?php } 
else { ?>
    <div class="col-md-2 col-sm-4">
        <h1 class="logo imglogo">
            <a href="">
                <img src="<?php echo get_bloginfo('template_directory');?>/images/picturehere.png" alt="title here"></a>
            </h1>
    </div>
<?php } ?>

The code above works fine, but how do apply the logo image swap on the sub-pages of the 'services'?

I am trying to output a logo depending on which page is being viewed.

<?php if ( is_page('home') || is_page('services') ) { ?>
    <div class="col-md-2 col-sm-4">
        <?php ci_e_logo('<h1 class="logo ' . get_logo_class() . '">', '</h1>'); ?>
    </div>
<?php } 
else { ?>
    <div class="col-md-2 col-sm-4">
        <h1 class="logo imglogo">
            <a href="http://websiteaddress">
                <img src="<?php echo get_bloginfo('template_directory');?>/images/picturehere.png" alt="title here"></a>
            </h1>
    </div>
<?php } ?>

The code above works fine, but how do apply the logo image swap on the sub-pages of the 'services'?

• pages
• child-pages

Share Improve this question edited Nov 24, 2014 at 5:04 Robert hue 8,55622 gold badges3434 silver badges5050 bronze badges asked Nov 24, 2014 at 2:59 user1752759user1752759 66733 gold badges1010 silver badges1818 bronze badges

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7 Answers 7

Sorted by: Reset to default 16

You can do that with $post->post_parent. You will have to check if child page's parent is Services page. So this is how you will check it.

I assumed 123 in following code is page ID of your services page. Replace it with actual ID.

if ( 123 == $post->post_parent ) { ?>
    <div class="col-md-2 col-sm-4">
        <?php ci_e_logo('<h1 class="logo ' . get_logo_class() . '">', '</h1>'); ?>
    </div>
<?php }

You can get the Post page / post name using this method.

$parent = array_reverse(get_post_ancestors($post->ID));
$page_parent = get_post($parent[0]);
echo $page_parent->post_name;

you can use the condition as per your requirements.

<?php 
global $post;

if ( is_page('home') || is_page('services') ) { ?>
    <div class="col-md-2 col-sm-4">
        <?php ci_e_logo('<h1 class="logo ' . get_logo_class() . '">', '</h1>'); ?>
    </div>
<?php } 

elseif ( preg_match( '#^service(/.+)?$#', $wp->request ) ) { ?>
    <div class="col-md-2 col-sm-4">
        <?php ci_e_logo('<h1 class="logo ' . get_logo_class() . '">', '</h1>'); ?>
    </div>
<?php
}

else { ?>
    <div class="col-md-2 col-sm-4">
        <h1 class="logo imglogo">
            <a href="<?php echo esc_url( home_url( '/' ) ); ?>">
                <img src="<?php echo get_bloginfo('template_directory');?>/images/picturehere.png" alt=""></a>
            </h1>
    </div>
<?php } ?>

Same as Robert Hue's answer, this solution will get you the ID of the parent element:

echo get_post_field( 'post_parent' );

The second parameter is optional and can hold an ID (for when you are outside the loop or want to query the parent of a specific element)

$post_ID = 666;
echo get_post_field( 'post_parent', $post_ID );

This function can get you any field from the post table, like the post slug, status, type... see the docs for all available fields.

In your case the function would look like this:

if ( get_post_field( 'post_parent' ) === 9 ) :
    //child of page ID 9
endif;

Try this

if ( wp_get_post_parent_id( get_the_ID() ) != 0 ) {
    echo 'I am a child page';
    // your code
}

Use get_post_ancestors($post). It will return an array if the current shown post is child of your parent page.

$post_current = get_post();

$args = array(
        'post_parent' => $parent_id, // the ID of the parent
        'posts_per_page' => -1,
        'post_type' => 'page',

);
$children = get_posts($args);

$is_child = false;

foreach ($children as $f) {
    if ( $f->ID == $post_current->post_parent ) {
        // it's a child 
        $is_child = true;
        break;
    }
}

if ($is_child) {
    // I'ts a child...
} else {
    // It is not a child...
}

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