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Problem with whitespace before doctype

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迷失自我
迷失自我 2021-01-19 00:45

I got some strange problem where i have 2 copies of same website in 2 different folders. In one of those 2 copies has whitespace before doctype declaration so i have problem

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8条回答
  • 情话喂你
    2021-01-19 01:04

    I just spent a day solving this problem where my libraries worked fine on static pages but under a dynamic system with a master script at the start (apache mod_write rewriting all to master script) the browser flipped into backward compat mode (js: alert(document.compatMode()) ) and distorted my styling. All my include files were ended properly and no echos, etc.. The problem? A blank line above the opening <?php of the master script.......

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  • 离开以前
    2021-01-19 01:13

    You may not believe but I have a MAGIC way to solve this problem:

    Upload your documents (which are included before <!DOCTYPE) on your host using File Manager of CPanel, then choose the document and Click "Edit" to see the source code of the document. Then press Ctrl+Home then press Delete!

    You see that nothing will be deleted but that hidden white space!! Save your document and you will notice that everything is OK now.

    I do this for all of my projects

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  • 别那么骄傲
    2021-01-19 01:13

    In my case this works fine:

    $ brew update
$ brew install coreutils
$ cd directoryWithSymfony2Project
$ for file in $(find ./ -name '*.twig' -or -name '*.php'); do sed `echo -e 's/[\xC2\xA0]//g'` $file > temp; echo 'Processing ' $file;rm $file; mv temp $file; done
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  • 忘了有多久
    2021-01-19 01:15

    I ran into this where a line break was above the Doctype. I tried a few things and then ended up just placing the doctype in the php.

    <?php
echo '<!DOCTYPE html>';
... other php code/includes/etc ...
?>
<html>
... other html elements ...

    Not sure if that's the right way to go about it, but it worked for me. If you're using a more extensive doctype, you'll need to escape special characters.

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  • 广开言路
    2021-01-19 01:17

    I'm almost positively certain that you have some trailing whitespace at the end of a PHP include. Check there first.

    Example:

    <?php
    // header file
    include 'other_file.php';
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"><!-- etc.  -->

    Then 

    <?php
    // other_file.php
    // connects to database, or something,
    // but notice the whitespace after the closing tag
?>



... pretend this text isn't here

    I added the note at the end to get stackoverflow's markdown editor to show the additional lines after the closing ?> tag. PHP automatically truncates one newline character after the tag in includes, but if you have more than one they will be interpreted as blank space before your doctype declaration.

    Easiest fix? Remove the closing tag ?> from all of your includes. This is a valid technique, and could be the fastest way for you to get up and running.

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  • 面向向阳花
    2021-01-19 01:17

    do you use session_start() or header() anywhere? then (without outbutbuffering) no whitespace or other character is allowed to send to the client before this functions.

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