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why does php implode causes new lines when reading files?

Time:08-30

i am using php to access an html file

$file = file("index.html");

then I am using

file_put_contents( "index.html", implode(PHP_EOL, $file) );

but what is going on here?!... there are new lines everywhere... the file is much bigger now, useless new line!!

if I do:

file_put_contents( "index.html", implode("", $file) );

the problem is fixed...

but if I modify the array $file, anything I add will be on the same line. I cannot add new values. what is going on here?!

somehow the strings in the file have new lines encoded in them.... and any string I add does not.

example: a 10 line file will have a bunch of text. If I read the file and get an array of 10 values, then add 11... using implode("", $file) ); will give... 10 lines!

what happened to my 11th value? it will be on the same line!

how is this possible?! what is going on here?!

CodePudding user response:

By default, file() keeps the newlines in the strings that it returns in the array. You get double-spacing if you add another newline between each line with implode(). And if you add additional elements to the array, but don't end them with a newline, you'll get inconsistent results.

You can use the FILE_IGNORE_NEW_LINES flag to tell it to strip these out.

$file = file("index.html", FILE_IGNORE_NEW_LINES);
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