Title: Error when adding additional attributes Last modified: September 1, 2016 --- # Error when adding additional attributes * Resolved [Aldo](https://wordpress.org/support/users/ab_lu/) * (@ab_lu) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/) * Hi Stefan * We try to add some additional attributes to the img tag: * ``` 'attributes' => array( 'img' => array( 'class' => 'lazyload img-responsive', 'data-sizes' => 'auto', 'data-parent-fit' => 'cover' ) ) ``` * Unfortunately we get then the following error: * ``` Warning: Illegal string offset 'property' in /Volumes/Data/WEB/HTDOCS/site/web/app/plugins/responsify-wp/includes/img.php on line 43

Warning: Illegal string offset 'value' in /Volumes/Data/WEB/HTDOCS/site/web/app/plugins/responsify-wp/includes/img.php on line 43

Warning: Illegal string offset 'property' in /Volumes/Data/WEB/HTDOCS/site/web/app/plugins/responsify-wp/includes/img.php on line 43

Warning: Illegal string offset 'value' in /Volumes/Data/WEB/HTDOCS/site/web/app/plugins/responsify-wp/includes/img.php on line 43
``` * Any idea? * [https://wordpress.org/plugins/responsify-wp/](https://wordpress.org/plugins/responsify-wp/) Viewing 15 replies - 1 through 15 (of 19 total) 1 [2](https://wordpress.org/support/topic/error-when-adding-additional-attributes/page/2/?output_format=md) [→](https://wordpress.org/support/topic/error-when-adding-additional-attributes/page/2/?output_format=md) * Plugin Author [stefanledin](https://wordpress.org/support/users/stefanledin/) * (@stefanledin) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544806) * Remove the `img` array. Like this: * ``` 'attributes' => array( 'class' => 'lazyload img-responsive', 'data-sizes' => 'auto', 'data-parent-fit' => 'cover' ) ``` * Thread Starter [Aldo](https://wordpress.org/support/users/ab_lu/) * (@ab_lu) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544808) * Still the same. * Plugin Author [stefanledin](https://wordpress.org/support/users/stefanledin/) * (@stefanledin) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544810) * With the other thread in mind, are you doing something special with media queries? The error occurs when the sizes attribute is created. * Thread Starter [Aldo](https://wordpress.org/support/users/ab_lu/) * (@ab_lu) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544812) * No, nothing special. This is the complete attributes array: * ``` $rwp_attributes = array( 'sizes' => array( 'image-xs', 'image-sm', 'image-md', 'image-lg', 'image-xlg' ), 'media_queries' => array( 'image-xs' => 'max-width: 320px', 'image-sm' => 'min-width: 321px', 'image-md' => 'min-width: 770px', 'image-lg' => 'min-width: 1000px', 'image-xlg' => 'min-width: 1540px' ), 'retina' => true, 'attributes' => array( 'class' => 'lazyload img-responsive', 'data-sizes' => 'auto', 'data-parent-fit' => 'cover' ) ); ``` * Thread Starter [Aldo](https://wordpress.org/support/users/ab_lu/) * (@ab_lu) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544814) * It only happens using `rwp_img`. With `rwp_picture` the output is fine. But I need to use `rwp_img` * Plugin Author [stefanledin](https://wordpress.org/support/users/stefanledin/) * (@stefanledin) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544834) * Oh, now I see. Media queries are written like that for the picture element. For` img`, you’re really only changing the `sizes` attribute, which you can set in the attributes array. * ``` $rwp_attributes = array( 'sizes' => array( 'thumbnail', 'medium', 'large' ), 'retina' => true, 'attributes' => array( 'class' => 'lazyload img-responsive', 'data-sizes' => 'auto', 'data-parent-fit' => 'cover', 'sizes' => '(min-width: 1540px) [image-lg-width]px, (min-width: 1000px) [image-lg-width]px, (min-width: 770px) [image-md-width]px, (min-width: 321px) [image-sm-width]px, [image-xs-width]px' ) ); ``` * I know it’s hard to understand the code above, but I think that this “formula” would do the trick. You just have to insert the sizes of your custom image sizes. * Thread Starter [Aldo](https://wordpress.org/support/users/ab_lu/) * (@ab_lu) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544839) * I still get the same error. BTW: Do I not need to add the retina sizes in the‘ sizes’ paramter? * Plugin Author [stefanledin](https://wordpress.org/support/users/stefanledin/) * (@stefanledin) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544853) * Really? You don’t have the old code in some other place? * Yeah you just have to add the image sizes that you wanna use. `img` just want to have a bunch of different images to choose from, it doesn’t care if it’s “ retina” or not. `picture` however needs to have the original and retina image grouped together in the same `` tag. * Thread Starter [Aldo](https://wordpress.org/support/users/ab_lu/) * (@ab_lu) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544855) * No nowhere else. And the warnings are returned exactly where the image markup is rendered. * Plugin Author [stefanledin](https://wordpress.org/support/users/stefanledin/) * (@stefanledin) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544860) * Haha, of course they are. Why would anything be easy? 😉 * Okey, back to the drawing board. Can I get the code for your custom image sizes and dimensions for the built in sizes so I can recreate the scenario? Twenty fifteen was the theme, right? * Thread Starter [Aldo](https://wordpress.org/support/users/ab_lu/) * (@ab_lu) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544861) * Her you go 🙂 * ``` add_image_size( 'image-xs', 385, 9999 ); add_image_size( 'image-xs@2x', 770, 9999 ); add_image_size( 'image-sm', 500, 9999 ); add_image_size( 'image-sm@2x', 1000, 9999 ); add_image_size( 'image-md', 770, 9999 ); add_image_size( 'image-md@2x', 1540, 9999 ); add_image_size( 'image-lg', 1000, 9999 ); add_image_size( 'image-lg@2x', 2000, 9999 ); add_image_size( 'image-xlg', 1540, 9999 ); add_image_size( 'image-xlg@2x', 3080, 9999 ); ``` * Regarding the theme, it doesn’t matter a tried with some standard WP themes and my own and I get everywhere the same warnings. * Plugin Author [stefanledin](https://wordpress.org/support/users/stefanledin/) * (@stefanledin) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544862) * Thanks! It works like a charm for me… I tested on a clean installation with twenty fifteen and standard RWP settings, beside of the `picture` element as markup pattern. * I uploaded an image and placed the following code above the loop in `index.php`: * ``` array( 'image-xs', 'image-sm', 'image-md', 'image-lg', 'image-xlg' ), 'retina' => true, 'attributes' => array( 'class' => 'lazyload img-responsive', 'data-sizes' => 'auto', 'data-parent-fit' => 'cover', 'sizes' => '(min-width: 1540px) 1540px, (min-width: 1000px) 1000px, (min-width: 770px) 770px, (min-width: 321px) 500px, 385px' ) )); ?> ``` * Works perfectly! * What happens if you remove the settings array? Any errors then? And if you then add one option at the time into the settings array? * You could also add `var_dump($mq);` before line 43 in `responsify-wp/includes/ img.php` and see what happens. It should look like this then: * ``` if ( isset($images[$i]['media_query']) ) { $mq = $images[$i]['media_query']; $attribute[] = '('.$mq['property'].': '.$mq['value'].') '.$images[$i]['width'].'px'; } else { $attribute[] = $images[$i]['width'].'px'; } ``` * Thread Starter [Aldo](https://wordpress.org/support/users/ab_lu/) * (@ab_lu) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544885) * Hi Stefan * I found the issue. Had the media_queries array still present. removed it and all okay. But one remaining issue. * The images in the srcset are all returned twice. Here the markup: * `` * Any idea? * Plugin Author [stefanledin](https://wordpress.org/support/users/stefanledin/) * (@stefanledin) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544908) * Isn’t it the retina sizes? * Thread Starter [Aldo](https://wordpress.org/support/users/ab_lu/) * (@ab_lu) * [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/#post-7544912) * No, if the would have the “@2x” in the filename, not? Viewing 15 replies - 1 through 15 (of 19 total) 1 [2](https://wordpress.org/support/topic/error-when-adding-additional-attributes/page/2/?output_format=md) [→](https://wordpress.org/support/topic/error-when-adding-additional-attributes/page/2/?output_format=md) The topic ‘Error when adding additional attributes’ is closed to new replies. * ![](https://ps.w.org/responsify-wp/assets/icon-256x256.png?rev=1209208) * [Responsify WP](https://wordpress.org/plugins/responsify-wp/) * [Frequently Asked Questions](https://wordpress.org/plugins/responsify-wp/#faq) * [Support Threads](https://wordpress.org/support/plugin/responsify-wp/) * [Active Topics](https://wordpress.org/support/plugin/responsify-wp/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/responsify-wp/unresolved/) * [Reviews](https://wordpress.org/support/plugin/responsify-wp/reviews/) * 19 replies * 2 participants * Last reply from: [Aldo](https://wordpress.org/support/users/ab_lu/) * Last activity: [9 years, 11 months ago](https://wordpress.org/support/topic/error-when-adding-additional-attributes/page/2/#post-7544933) * Status: resolved