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How to fix “Headers already sent” error in PHP
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summary ⇊
Otherwise the call fails:
Warning: Cannot modify header information - headers already sent (output started at script:line)
Some functions modifying the HTTP header are:
header / header_remove
session_start / session_regenerate_id
setcookie / setrawcookie
Output can be:
Unint...
The way to check a HDFS directory's size?
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hadoop fs -du -s -h /path/to/dir displays a directory's size in readable form.
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How do I create a URL shortener?
...ght error prone. Try to use lower or upper case only.
Also, try to have a format where you mix the numbers and characters in a predefined form. There are studies that show that people tend to remember one form better than others (think phone numbers, where the numbers are grouped in a specific form...
Pandas count(distinct) equivalent
...answer. How can I use this method if my column name has a '.' in it (e.g. 'ck.Class')? Thanks
– user5569985
Dec 18 '17 at 23:38
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How to install packages using pip according to the requirements.txt file from a local directory?
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Information on --no-index from command pip help install --no-index Ignore package index (only looking at --find-links URLs instead). Information on --find-links from command pip help install -f, --find-links <url> If a...
Printing the value of a variable in SQL Developer
...o print the value of a particular variable which is inside an anonymous block. I am using Oracle SQL Developer. I tried using dbms_output.put_line . But it is not working. The code which I am using is shown below.
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How to add http:// if it doesn't exist in the URL?
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A modified version of @nickf code:
function addhttp($url) {
if (!preg_match("~^(?:f|ht)tps?://~i", $url)) {
$url = "http://" . $url;
}
return $url;
}
Recognizes ftp://, ftps://, http:// and https:// in a case insensitive way.
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How to use WHERE IN with Doctrine 2
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Quick mention: This works per default with ->setParameter('ids', $ids) but not with ->setParameters('ids' => $ids). Took me some minutes of debugging.
– larrydahooster
Sep 29 '15 a...
How to find all combinations of coins when given some dollar value
...e Mathematica source.
By using generating functions, you can get a closed-form constant-time solution to the problem. Graham, Knuth, and Patashnik’s Concrete Mathematics is the book for this, and contains a fairly extensive discussion of the problem. Essentially you define a polynomial where the ...
Is there any way to post events to Google Analytics via server-side API? [closed]
...st.Method = "POST";
myRequest.ContentType = "application/x-www-form-urlencoded";
myRequest.ContentLength = data.Length;
Stream newStream = myRequest.GetRequestStream();
newStream.Write(data, 0, data.Length);
newStream.Close();
}
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