Web page saved as utf-8 encoding issues warning as "Headers alreeady sent"

Asked Dec 19 '18 at 02:45

Active Dec 19 '18 at 02:45

Viewed 12 times

I am doing a small web-based project using PHP. Each time I run it, I get weird message like "Warning: session_start(): Cannot send session cookie - headers already sent by", "Warning: session_start(): Cannot send session cache limiter - headers already sent" etc.

I checked my code and found nothing wrong with it. After troubleshooting, I found it is actually due to the encoding which is utf-8 that I used to save the PHP page on the server. Because, if I use a different encoding (e.g, ANSI) it works fine again. For example we may consider the following single line code saved as utf-8 which gives the warning as mentioned in the question title:

<?php session_start();?>

So, at this point I would like to know the possible cause of the problem and also how it can be resolved.

With thanks.

asked Dec 19 '18 at 02:45

Parveez Ahmed

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Its probably saved as utf-8 with BOM, which is bad. Which text editor are you using? – tkausl Dec 19 '18 at 02:46
@tkausl So what should be done? – Parveez Ahmed Dec 19 '18 at 02:48
Save it as utf-8 without BOM if your text-editor supports it. – tkausl Dec 19 '18 at 02:50
@tkausl I am using notepad on windows 7 – Parveez Ahmed Dec 19 '18 at 02:50
I can see no option like this here – Parveez Ahmed Dec 19 '18 at 02:51
notepad? You mean the windows standard editor? Thats a horrible choice for programming, I suppose it always uses a BOM for utf-8. There are many really good editors, including Sublime Text, Atom and Visual Studio Code, you should start using one of these. – tkausl Dec 19 '18 at 02:51
oh,nice advice, thank you for that. – Parveez Ahmed Dec 19 '18 at 02:53
@rosemary you can also download a good free code editor called "notepad++" https://notepad-plus-plus.org. *Disclaimer*: I am in no way affiliated with them, I use it myself besides another one. That one also lets you choose which encoding to save as. – Funk Forty Niner Dec 19 '18 at 03:25
@tkausl thank you so much again. Is there any saving options like utf-8 without BOM there? – Parveez Ahmed Dec 19 '18 at 07:08

Web page saved as utf-8 encoding issues warning as "Headers alreeady sent"

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