Can I delete / update line inside the file ?

Hi, I have one file with following format No. | Name | Email | status 1 | Manisha | manisha@aurica.com | Pending 2 | Neha | neha@hotmail.com | Reject 3 | Aish | aish@yahoo.com | Pending ....... I want to update status change against that line. e.g For sr no 1 - I want to change the status from Pending to Accepted. I read about the fseek / fwrite command, but did not came across the delete the line from file. I believe fseek command will write a line starting from pointer but will not overwrite. I am using PHP3 and no database is available (That's the main problem). And many times I need to seek the record (line) , change it and store back. I may be asking some silly questions as I am very very new to PHP. Please bear with me. Thanks in advance Manisha