Home Forums Weaver Show Posts & Show Sliders Trailing white space PHP files causes WP 5.3 PHP Warnings, Headers already sent

This topic contains 1 reply, has 2 voices, and was last updated by  Weaver 2 weeks, 1 day ago.

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  • #62067

    timreeves
    Participant

    This is a real problem for me on many sites, already noted by myself on WP Support.

    After updating to 5.3 I’m suddenly seeing lots of PHP warnings like this:

    [20-Nov-2019 12:07:45] WARNING: [pool meischner.world] child 26697 said into stderr: "NOTICE: PHP message: PHP Warning:
    Cannot modify header information - headers already sent in /var/www/vhosts/meischner.world/httpdocs/wp-content/plugins/
    comet-cache/src/includes/traits/Shared/HttpUtils.php on line 175"

    After deactivating all plugins except Comet Cache the problem is gone – sequentially reactivating identified 9 (!) Plugins which cause this, on just one WP site. Show Posts (a great plugin, I use it on quite a few sites) was also a “culprit”. I checked it – ALL the PHP files have trailing white space after the ?>. I removed them and uploaded manually – the problem is solved (at least, for “Show Posts”).

    @weaver: I know this is an “older” plugin and for sure it’s not making you rich – but it is a great plugin, and I and many others are relying on it. It’s still working fine in WP 5.3 (except for the problem noted here) – so could you please delete all the ?>, bump up compat to 5.3 and publish the new version? Would be very much obliged!

    Thanks, Tim

    #62068

    Weaver
    Keymaster

    Hmm –  that must be something related to WP 5.3, but I don’t remember seeing what that was a widely used version.

    I can’t imagine what they might have done to “break” long standing code that follows appropriate PHP standards.

    Since that seems to be an issue now, I will try to update all the plugins to not use closing ?>s. Not sure of the time frame, however.

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