How to check if I am inside the WP Theme Customizer preview?

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I have some elements showing on the home page that I do not want to display in the Theme Customizer preview window. Is there a simple check in PHP that I can use for that ?

For example:

<img class="background" src="https://wordpress.stackexchange.com/questions/101713/<?php echo $background ?>" <?php if(is_wpThemeCustomizer()) echo 'style="display:none"' ?>/>

I could do it in javascript using the js file that is enqueued only in this case, but I would like to use PHP, or even better : CSS. Is it possible ?

4 Answers
4

Check for global variable $wp_customize:

if ( empty ( $GLOBALS['wp_customize'] ) ) 
{
    // show something
}

Update: in WordPress 4.0, you can use is_customize_preview().

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