Title: Changing header code in functions.php Last modified: August 20, 2016 --- # Changing header code in functions.php * [sbbn](https://wordpress.org/support/users/sbbn/) * (@sbbn) * [14 years ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/) * I’m having trouble changing the header image height in functions.php. I created a child theme functions.php file with nothing in it but this: * `define( 'HEADER_IMAGE_HEIGHT', apply_filters( 'brunelleschi_header_image_height', 300) );` * The original code says 198 for the height and I have changed it to 300. The Dashboard now says the image will be 300 px tall, but when I put in an image it gets scaled back down to the original 198 even though I changed the code. * Are there other lines of code I should be using? Viewing 15 replies - 1 through 15 (of 18 total) 1 [2](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/page/2/?output_format=md) [→](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/page/2/?output_format=md) * [Kakoma](https://wordpress.org/support/users/kakomap/) * (@kakomap) * [14 years ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754299) * Hi sbbn, The name of theme you are using and your site URL would help us give more informed responses BUT have you tried changing CSS instead? * Thread Starter [sbbn](https://wordpress.org/support/users/sbbn/) * (@sbbn) * [14 years ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754312) * I forgot the URL, sorry: * marieprevostonline.com * I’m using Brunelleschi. I don’t think there’s anything in the style.css to define the header. Here is the code bit for the header in style.css: * _[CSS [code moderated](http://codex.wordpress.org/Forum_Welcome#Posting_Code)– a link to your site is enough to access the styles]_ * Thanks! * [Digital Raindrops](https://wordpress.org/support/users/adeptris/) * (@adeptris) * [14 years ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754345) * Hi, two things, * The child themes functions.php is run first before the parents functions.php, and you need to remove and reset the filter. * I hacked this together from one of my a twenty eleven child themes, it is **NOT Tested** so be careful. * [http://pastebin.com/R8QRS7Bu](http://pastebin.com/R8QRS7Bu) * If you change anything update and revise the pastebin for others that might read this topic. * There is an after setup theme function * ``` add_action( 'after_setup_theme', 'child_theme_setup' ); ``` * This should: Remove and reset the filter. Remove the existing header images as they are not tall enough Set a new default header from the child themes /images/ folder * HTH * David * [Michael](https://wordpress.org/support/users/alchymyth/) * (@alchymyth) * [14 years ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754360) * > but when I put in an image * did you upload a new image with the new dimensions? * afaik, the changes will only get applied to new uploaded images. * Thread Starter [sbbn](https://wordpress.org/support/users/sbbn/) * (@sbbn) * [14 years ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754363) * Unfortunately that didn’t work, but thanks for trying! I fiddled with the code a bit and kept getting this error: * > Warning: Cannot modify header information – headers already sent by (output > started at /home/XXXXXX/public_html/wp-content/themes/brunelleschi-child/functions. > php:1) in /home/XXXXXX/public_html/wp-includes/pluggable.php on line 866 * (The X’s are just to block out my administration userid.) * That line 866 in pluggable.php is: * > header(“Location: $location”, true, $status); * I’m not really sure what that means. * Thread Starter [sbbn](https://wordpress.org/support/users/sbbn/) * (@sbbn) * [14 years ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754364) * Hi alchymyth — Yes, I tried a new image, a custom one that I mocked up just so it would have a 300 px height. It was resized to the original 198 px height. * [Digital Raindrops](https://wordpress.org/support/users/adeptris/) * (@adeptris) * [14 years ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754370) * Hi, I had the wrong arguments for removing the filter (singular), not filters( plural) like I had it in paste one. * ``` remove_filters( 'brunelleschi_header_image_height'); ``` * Should have been, in paste link two! * ``` remove_filter( 'brunelleschi_header_image_height', 198); ``` * This is now **Tested Code**, I downloaded the theme and created a child theme, and it works fine! * [http://pastebin.com/3wVrD58p](http://pastebin.com/3wVrD58p) * HTH * David * Thread Starter [sbbn](https://wordpress.org/support/users/sbbn/) * (@sbbn) * [13 years, 12 months ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754446) * Thank you, but it didn’t work. I am flummoxed. I just cut and pasted it exactly as shown in the pastebin file into a new functions.php in the child theme folder. * I thought at first the problem was that I had changed the width from 1140 to 1024, but I went back to 1140 and that didn’t work, either. * I don’t think the problem is anything I did in the style.css file (in my child theme folder). All I changed in there were the colors, and I don’t think I accidentally broke some code while doing so. * Do you think an uninstall and re-install of Brunelleschi would help? * [Digital Raindrops](https://wordpress.org/support/users/adeptris/) * (@adeptris) * [13 years, 12 months ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754447) * Hi, Before you do that test the Brunelleschi Child Theme download from [this category link](http://digitalraindrops.net/all-downloads/?category=13), it is the files I used to test the concept. * HTH * David * Thread Starter [sbbn](https://wordpress.org/support/users/sbbn/) * (@sbbn) * [13 years, 12 months ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754451) * I downloaded those files, used them (deleting the ones I had in the directory previously) and it still didn’t work. * [Chip Bennett](https://wordpress.org/support/users/chipbennett/) * (@chipbennett) * [13 years, 12 months ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754454) * You need to add your own filter: * ``` function brunelleschi_child_filter_header_image_height( $height ) { // set equal whatever height you want; // e.g. for 300px, use 300 $new_height = 300; // now return it return $new_height; } add_filter( 'brunelleschi_header_image_height', 'brunelleschi_child_filter_header_image_height' ); ``` * Thread Starter [sbbn](https://wordpress.org/support/users/sbbn/) * (@sbbn) * [13 years, 12 months ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754455) * My goodness Chip, that did it. Thank you so much! And thank you too, Digital Raindrops! * [Digital Raindrops](https://wordpress.org/support/users/adeptris/) * (@adeptris) * [13 years, 12 months ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754467) * Strange, I tested it again! * Default Headers Removed and New Header Size! [Screenshot Admin](http://digitalraindrops.net/images/brunelleschi-child1.png) [Screenshot Website](http://digitalraindrops.net/images/brunelleschi-child.png) * HTH * David * Thread Starter [sbbn](https://wordpress.org/support/users/sbbn/) * (@sbbn) * [13 years, 12 months ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754468) * That is so strange. I assume we both have WP 3.3.2, and we both surely downloaded the same version of Brunelleschi. I have no idea why it didn’t work for me. * [rosie4tune](https://wordpress.org/support/users/rosie4tune/) * (@rosie4tune) * [13 years, 8 months ago](https://wordpress.org/support/topic/changing-header-code-in-functionsphp/#post-2754486) * Just wondering Chip if that little snippet is slotted into the functions.php tested by Digital Raindrops, i.e. * ```