How would write to specific line to already existing file?

[PHPForever]

Hi there?

I'm wondering if it is possible to write to a specific line to a text file. I'm trying to update data on that specific line. I know it has to be done using $filepointer but I don't know exactly how to specify the exact line.

George Andre P.

[devinemke]

pull the file into an array using the file() function. each line of the text file will be a separate array index. replace whichever index you need to then write it all back to the text file.

[PHPForever]

Yes, this would be one way to do it. Howerver I just tried it and it is great for reading and writting to small files, but when it comes to a file contaning 1 million lines, PHP uses 180Mb's memory and a time of 20++ seconds just to read the file!
I'm looking for a more efficient way to do this. However, thank you...