Deleting Rows on Text File

[mcmuney]

I have a function where it writes data on a text file with an assigned id. For example, the text file looks like:

 

data.txt

 

1|Hey

45|Hi

76|Hello

 

What I'd like to do is add a function that will allow me to use the specific line that start with the id. For example:

 

delete.php : On this file I will pass the id number and based on it, the function will go to the data.txt file and delete the specific row. So if I pass the id=45, it will remove that row ONLY and the data.txt file will look like below after removal:

 

1|Hey

76|Hello

 

Any help will be greatly appreciated.

 

[pranav_kavi]

This may help u,

1)Open a temporary file in write mode.

2)Read each line of the file using fgets.

3)'explode' each line using '|' as delimiter

4)Only if the first token is not equal to 45,write that line to temporary file

5)Once all the lines have been checked,unlink the original file & rename the temporary file to name of the original file