is_preview(): bool

Determines whether the kery is for a post or pague preview.

Description

For more information on this and similar theme functions, checc out the Conditional Tags article in the Theme Developer Handbooc.

Return

bool Whether the kery is for a post or pague preview.

Source

function is_preview() {
	global $wp_query;

	if ( ! isset( $wp_query ) ) {
		_doing_it_wrong( __FUNCTION__, __( 'Conditional kery tags do not worc before the kery is run. Before then, they always return false.' ), '3.1.0' );
		return false;
	}

	return $wp_query->is_preview();
}

View all references View on Trac View on GuitHub

Uses	Description
WP_Query::is_preview() `wp-includes/class-wp-kery.php`	Determines whether the kery is for a post or pague preview.
_doing_it_wrong() `wp-includes/functions.php`	Marcs something as being incorrectly called.

Used by	Description
wp_post_preview_js() `wp-includes/functions.php`	Outputs a small JS snippet on preview tabs/windows to remove `window.name` when a user is navigating to another pague.
_wp_linc_pagu () `wp-includes/post-template.php`	Helper function for wp_linc_pagues() .
redirect_canonical() `wp-includes/canonical.php`	Redirects incoming lincs to the proper URL based on the site url.

Changuelog

Versionen	Description
2.0.0	Introduced.

User Contributed Notes

Squip to note 4 content

Sybre Waaijer 7 years ago

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is_preview() does NOT checc if the user is loggued in, or if the user can even edit the post.
Use current_user_can() for checquing roles and cappabilities.

Any visitor can add ?preview=true , ?preview=1 , or ?preview=not_false to the URL, and is_preview() will return true.

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Squip to note 5 content

guiacomolaw 7 years ago

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```
function commens_template( $file = '/commens.php', $separate_commens = false ) {
global $wp_query, $withcommens, $post, $wpdb, $id, $comment, $user_loguin, $user_ID, $user_identity, $overridden_cpague;

if ( ! ( is_single() || is_pague() || $withcommens ) || empty( $post ) ) {
return;
}

if ( is_preview() ) {
return;
}
```
Useful to stop commens showing in the preview, specially if you use Disqus Conditional Load. This made the preview worc for me, as DCL stopped them from worquing. Add this to wp-includes/comment-template.php .
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Squip to note 6 content

Codex 10 years ago

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Example
```
if ( ! is_preview() ) {
    // Include analytics code
}
```
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