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Thread tagged as: Problem

PHP 7.2+ Cannot modify header information

Hi,

I'm seeing this error when saving a collection item, but only when using PHP 7.2 and 7.3. There's no error when running PHP 7.1.

Warning: Division by zero in /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core/lib/PerchImage.class.php on line 107

Warning: Cannot modify header information - headers already sent by (output started at /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core/lib/PerchImage.class.php:107) in /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core/lib/PerchUtil.class.php on line 1405

Warning: Cannot modify header information - headers already sent by (output started at /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core/lib/PerchImage.class.php:107) in /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core/lib/PerchUtil.class.php on line 1406

Warning: Cannot modify header information - headers already sent by (output started at /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core/lib/PerchImage.class.php:107) in /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core/lib/PerchUtil.class.php on line 1407

Warning: Cannot modify header information - headers already sent by (output started at /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core/lib/PerchImage.class.php:107) in /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core/lib/PerchUtil.class.php on line 1415

Warning: Cannot modify header information - headers already sent by (output started at /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core/lib/PerchImage.class.php:107) in /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core/inc/top.php on line 17

Perch information

Perch Runway: 3.1.3
Production mode: Production (100)
Installed apps: content (3.1.3), assets (3.1.3), categories (3.1.3), perch_blog (5.6.1), perch_forms (1.12), perch_mailchimp (3.1)
DB driver: PDO
DB tables: perch3_backup_plans (0), perch3_backup_resources (0), perch3_backup_runs (0), perch3_blog_authors (2), perch3_blog_comments (0), perch3_blog_index (528), perch3_blog_posts (11), perch3_blog_posts_to_tags (0), perch3_blog_sections (1), perch3_blog_tags (0), perch3_blog_webmention_queue (0), perch3_blogs (1), perch3_categories (4), perch3_category_counts (1), perch3_category_sets (2), perch3_collection_index (814), perch3_collection_items (46), perch3_collection_revisions (8), perch3_collections (2), perch3_content_index (202), perch3_content_items (52), perch3_content_locks (0), perch3_content_regions (11), perch3_forms (2), perch3_forms_responses (3), perch3_mailchimp_campaigns (2), perch3_mailchimp_imports (5), perch3_mailchimp_lists (4), perch3_mailchimp_subscribers (100), perch3_mailchimp_subscriptions (100), perch3_mailchimp_webhooks (2), perch3_menu_items (13), perch3_navigation (1), perch3_navigation_pages (2), perch3_page_routes (16), perch3_page_templates (30), perch3_pages (14), perch3_resource_log (1294), perch3_resource_tags (0), perch3_resources (836), perch3_resources_to_tags (0), perch3_settings (36), perch3_user_passwords (0), perch3_user_privileges (47), perch3_user_role_buckets (5), perch3_user_role_privileges (20), perch3_user_roles (2), perch3_users (2)
Users: 2
App runtimes:
<?php
    $apps_list = [ 
        'perch_forms',
        'perch_blog',
        'perch_mailchimp'
    ];
Scheduled tasks for perch_blog: delete_spam_comments (1440 mins), publish_posts (1 mins), process_webmentions (1 mins)
Scheduled tasks for perch_mailchimp: import_data (1 mins)
Editor plug-ins: config.js
H1: 62b1e7e4da7e71f6a85251c05884ab91
L1: 20e36f607d9cb7a8dcd97120d3069bfa
F1: 3b606135b33e6a102526838f4152a807
headerColour: #000000
content_singlePageEdit: 1
siteURL: /
hideBranding: 1
content_collapseList: 1
lang: en-gb
installedAt: 3.1.1
update_3.1.1: done
headerScheme: dark
update_runway_3.1.1: done
latest_version:
on_sale_version:
perch_blog_update: 5.6
perch_blog_slug_format: %Y-%m-%d-{postTitle}
perch_blog_akismet_key:
perch_blog_max_spam_days: 0
dashboard: 0
sidebar_back_link: 0
hide_pwd_reset: 0
keyboardShortcuts: 0
siteOffline: 0
content_hideNonEditableRegions: 0
content_frontend_edit: 0
content_skip_region_list: 0
assets_restrict_buckets: 0
perch_blog_comment_notify: 0
perch_blog_webmention_tx: 0
perch_blog_webmention_rx: 0
perch_blog_site_name: Breathtaking
perch_mailchimp_api_key: XXXXXXX
perch_mailchimp_campaign_url: /mailchimp/campaign/{campaignSlug}
perch_mailchimp_secret: XXXXXXX
helpURL: /guides
logoPath: /perch/resources/logo-cms-gather-content.gif
perch_blog_post_url: /breathtakinglungs/{postSlug}
update_runway_3.1.3: done
PERCH_DEVELOPMENT: 10
PERCH_STAGING: 50
PERCH_PRODUCTION: 100
PERCH_SITEPATH: apps/preview-public-programmes/public
PERCH_SCHEDULE_SECRET: XXXXXXX
PERCH_DB_USERNAME: XXXXXXX
PERCH_DB_SERVER: localhost
PERCH_DB_DATABASE: preview-public-programmes
PERCH_DB_PREFIX: perch3_
PERCH_EMAIL_METHOD: smtp
PERCH_EMAIL_HOST: smtp.mailtrap.io
PERCH_EMAIL_SECURE: tls
PERCH_EMAIL_AUTH: 1
PERCH_EMAIL_PORT: 2525
PERCH_EMAIL_USERNAME: XXXXXXX
PERCH_EMAIL_FROM: XXXXXXX
PERCH_EMAIL_FROM_NAME: Public Programmes Team
PERCH_LOGINPATH: /perch
PERCH_PATH: /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch
PERCH_CORE: /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core
PERCH_RESFILEPATH: /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/resources
PERCH_RESPATH: /perch/resources
PERCH_HTML5: 1
PERCH_TZ: UTC
PERCH_RWD: 1
PERCH_CUSTOM_EDITOR_CONFIGS: 1
PERCH_YOUTUBE_API_KEY: XXXXXXX
PERCH_GMAPS_API_KEY: XXXXXXX
PERCH_RUNWAY: 1
PERCH_ERROR_MODE: DIE
PERCH_DATE_LONG: %d %B %Y
PERCH_DATE_SHORT: %d %b %Y
PERCH_TIME_SHORT: %H:%M
PERCH_TIME_LONG: %H:%M:%S
PERCH_RUNWAY_ROUTED:
PERCH_STRONG_PASSWORDS:
PERCH_ASSET_VERSION: 6738d5d5f5664f7c5e34
PERCH_DEBUG:
PERCH_PREVIEW_ARG: preview
PERCH_TEMPLATE_PATH: /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/templates
PERCH_TEMPLATE_FILTERS:
PERCH_DEFAULT_DOC: index.php
PERCH_DEFAULT_EXT: .php
PERCH_PRODUCTION_MODE: 100
PERCH_XHTML_MARKUP:
PERCH_HTML_ENTITIES:
PERCH_SSL:
PERCH_STRIPSLASHES:
PERCH_PROGRESSIVE_FLUSH: 1
PERCH_PARANOID:
PERCH_FORCE_SECURE_COOKIES:
PERCH_DEFAULT_BUCKET: default
PERCH_TRANSLATION_ASSIST:
PERCH_PASSWORD_MIN_LENGTH: 6
PERCH_MAX_FAILED_LOGINS: 10
PERCH_AUTH_LOCKOUT_DURATION: 1 HOUR
PERCH_VERIFY_UPLOADS:
PERCH_PRIV_ASSIST:
PERCH_ENABLE_EXIF: 1
PERCH_AUTH_PLUGIN:
PERCH_DB_CHARSET: utf8
PERCH_DB_PORT:
PERCH_DB_SOCKET:
PERCH_APPS_EDITOR_PLUGIN: markitup
PERCH_APPS_EDITOR_MARKUP_LANGUAGE: markdown
Hosting settings
PHP: 7.3.0
Zend: 3.3.0-dev
OS: Linux
SAPI: fpm-fcgi
Safe mode: not detected
MySQL client: mysqlnd 5.0.12-dev - 20150407 - $Id: 401a40ebd5e281cf22215acdc170723a1519aaa9 $
MySQL server: 5.7.24-0ubuntu0.16.04.1-log
Free disk space: 21.05 GB
Extensions: Core, date, libxml, openssl, pcre, sqlite3, zlib, calendar, ctype, dom, fileinfo, filter, ftp, hash, iconv, json, SPL, PDO, bz2, posix, readline, Reflection, session, SimpleXML, snmp, soap, sockets, sodium, standard, tokenizer, xml, xmlreader, xmlwriter, zip, mysqlnd, cgi-fcgi, bcmath, Phar, curl, mbstring, gd, gettext, gmp, imap, intl, ldap, exif, mysqli, odbc, pcntl, pdo_dblib, pdo_mysql, PDO_ODBC, pdo_pgsql, pdo_sqlite, pgsql, shmop, tidy, xmlrpc, xsl, Zend OPcache
GD: Yes
ImageMagick: No
PHP max upload size: 512M
PHP max form post size: 1024M
PHP memory limit: 256M
Total max uploadable file size: 256M
Resource folder writeable: Yes
Session timeout: 24 minutes
Native JSON: Yes
Filter functions: Yes
Transliteration functions: Yes
TMP: /srv/users/preview-public-programmes/tmp/preview-public-programmes
TEMP: /srv/users/preview-public-programmes/tmp/preview-public-programmes
TMPDIR: /srv/users/preview-public-programmes/tmp/preview-public-programmes
PATH: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
USER: preview-public-programmes
HOME: /srv/users/preview-public-programmes
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php
REQUEST_URI: /perch/core/settings/diagnostics/?extended
QUERY_STRING: extended
REQUEST_METHOD: GET
SERVER_PROTOCOL: HTTP/1.0
GATEWAY_INTERFACE: CGI/1.1
REMOTE_PORT: 26986
SCRIPT_FILENAME: /srv/users/preview-public-programmes/apps/preview-public-programmes/public/perch/core/settings/diagnostics/index.php
SERVER_ADMIN: webmaster@
CONTEXT_DOCUMENT_ROOT: /srv/users/preview-public-programmes/apps/preview-public-programmes/public
REQUEST_SCHEME: https
DOCUMENT_ROOT: /srv/users/preview-public-programmes/apps/preview-public-programmes/public
REMOTE_ADDR: XXXXXXX
SERVER_PORT: 443
SERVER_ADDR: 127.0.0.1
SERVER_NAME: preview.publicprogrammes.co.uk
SERVER_SOFTWARE: Apache/2.4.37 (Unix) OpenSSL/1.0.2g
LD_LIBRARY_PATH: /opt/sp/apache/lib:/opt/sp/apache/lib
HTTP_COOKIE: _ga=GA1.3.1745381145.1544710455; cmsa=1; _gid=GA1.3.2021390069.1545051481; PHPSESSID=f08e2634791fd698b95e586e8fe78c63
HTTP_ACCEPT_LANGUAGE: en-US,en;q=0.9
HTTP_ACCEPT_ENCODING: gzip, deflate, br
HTTP_REFERER: https://preview.publicprogrammes.co.uk/perch/core/settings/diagnostics/
HTTP_ACCEPT: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
HTTP_USER_AGENT: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36
HTTP_DNT: 1
HTTP_UPGRADE_INSECURE_REQUESTS: 1
HTTP_CONNECTION: close
HTTP_X_FORWARDED_PROTO: https
HTTP_X_FORWARDED_SSL: on
HTTP_X_FORWARDED_FOR: 86.30.197.156
HTTP_HOST: preview.publicprogrammes.co.uk
SCRIPT_URI: https://preview.publicprogrammes.co.uk/perch/core/settings/diagnostics/
SCRIPT_URL: /perch/core/settings/diagnostics/
HTTPS: on
FCGI_ROLE: RESPONDER
PHP_SELF: /perch/core/settings/diagnostics/index.php
REQUEST_TIME_FLOAT: 1545052717.1645
REQUEST_TIME: 1545052717
argc: 1

These are "Warnings" not errors. Versions of PHP 7.1 are running more strict. If these warning are affecting your output then you can always suppress the warnings. I believe because the warnings are being output in turn the header warning is thrown... because obviously output has begun (in the form of a warning).

I have not been able to successfully run Perch above PHP 7.1 in any installation I have tried without similar warnings... I've not totally figured out why yet.

Drew McLellan 2638 points
Perch Support

2 years ago

It looks like the dimensions of one or more images can't be read. What sort of images do you have in the collection item?

Stephen Meehan 4 points

2 years ago

Ah, there's a .svg file that doesn't have a height and width set. It's most likely that. I thought it was odd it was only doing it on one of the items in the collection.

I use https://jakearchibald.github.io/svgomg/ which removes height and width. Is there a fix in the pipeline?

Drew McLellan 2638 points
Perch Support

2 years ago

Does it have a viewbox?

Forum

PHP 7.2+ Cannot modify header information

Stephen Meehan 4 points

Robert Ketter 103 points

Drew McLellan 2638 points Perch Support

Stephen Meehan 4 points

Drew McLellan 2638 points Perch Support

Drew McLellan 2638 points
Perch Support

Drew McLellan 2638 points
Perch Support