writing to a file help

[HCProfessionals]

Ok, I know how to write to a file, but what I'm looking for is to check if a line of code exists, and if it is, don't recreate it. It would also be nice to not recreate the file either.

 

$file = fopen("index.html", "w");
fwrite($file,"This is a line of text");
fclose($file);

[HCProfessionals]

Now, how can I do checks to make sure the line of code doesn't already exist?

 

$file = 'index.html';
$content = "This is a line of text";
file_put_contents($file, $content, FILE_APPEND | LOCK_EX);

[requinix]

You can write to a file in-place but you'll only overwrite what is there (ie, there is no "insert" mode). If the size of the file could change then you have to recreate it.

 

To check if the line exists you have to get all the lines and check if any of them are identical to your new line. Remember that file() keeps newlines on all the lines so you'll need to remove them before trying in_array().