PHP file_put_contents not saving but no error/warning shown

I'm trying to load a file, add some text and then save the file, I have this:

$css = file_get_contents("unzipped/$folder/style.css");
if(file_put_contents("ADD THIS " . $css, "unzipped/$folder/style.css")){
   echo("All Done!"); 
}

and even though 'All Done!' is echoed the contents of the file isn't changing.

Any ideas? :S开发者_高级运维

EDIT:

I also want to add that if I echo $css the contents of the file is shown correctly

Your parameters are in the wrong order. See the file_put_contents documentation. Your corrected code:

$css = file_get_contents("unzipped/$folder/style.css");
if(file_put_contents("unzipped/$folder/style.css", "ADD THIS " . $css)){
   echo("All Done!"); 
}

You'll probably notice a file called "ADD THIS " with the contents of that file, as the file name. The contents of the crazily named file will be whatever unzipped/$folder/style.css would parse out to.

The path to the file is the first argument to file_put_contents.

$css = file_get_contents("unzipped/$folder/style.css");
if(file_put_contents("unzipped/$folder/style.css", "ADD THIS " . $css)){
   echo("All Done!"); 
}

When you use functions that might return a zero as a valid result you should use strict type comparison (===)

if(file_put_contents("ADD THIS " . $css, "unzipped/$folder/style.css") === true){
   echo("All Done!"); 
}