Cannot modify header information – headers already sent

  • Ambyomoron

    (@josiah-s-carberry)


    5 years, 6 months ago

    I note that the following warning now appears in my php error log:

    PHP message: PHP Warning: Cannot modify header information – headers already sent by (output started at /blahblah/wp-content/plugins/yoast-seo-search-index-purge/src/Yoast_Purge_Attachment_Page_Server.php:46) in /blahblah/wp-content/plugins/wp-content-security-policy/includes/WP_CSP.php on line 548

    I don’t know if this a latent mistake in Content Security Policy that only started to appear with the upgrade of the Yoast plugin to 11.2.1, or if the error is in the Yoast plugin. You might wish to investigate.

    This discussion might be relevant:
    https://stackoverflow.com/questions/8028957/how-to-fix-headers-already-sent-error-in-php

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