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Editorial Team
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Asked: 2026-05-16T04:24:31+00:00

I have my site live in which i echoed few strings for testing, so

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I have my site live in which i echoed few strings for testing, so it displayed me those test strings but along with the warning message

Warning: Cannot modify header
information – headers already sent by
(output started at
/home/companyfolder/public_html/mycart.php:117)
in
/home/companyfolder/public_html/includes/functions/general.php
on line 50

But at the same time i do not get this error any where in my local machine so i want to know is there any difference in display of header information related to servers?

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1 Answer

  1. Editorial Team

    Because of output buffering

    And not a single one, who volunteered to share their knowledge about error handling, mentioned a way more likely reason – display_errors turned off, as it on the live site ought to be.

    Of course it should be. To

    • not to scare users with strange messages
    • not to reveal vital info of your application to possible attacker. nor to supply them with any feedback.
    • inform a programmer of all errors occurred, by turning log_errors setting on

    Thus, on a development site

    display_errors = on
log_errors = off

    on a live site

    display_errors = off
log_errors = on

    while error reporting level should remain the same – E_ALL or better

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