Limit lines in text file

[jackL]

Hi everyone 🙂

i have an application that writes user input to a text file.
as the number of lines in the file increase, the app. slows down.

i need to find a method that reads the number of lines in the text file,
and auto-removes any line past line 50.

is this possible ? thanks for any insights here 🙂

the php i am currently using is -

<?php
$text = $_POST[sendText];
$myfile = fopen("test.txt","a");
$fp = fwrite($myfile,$text);
$fp = fwrite($myfile,chr(13));
fclose($myfile);
print "&response=".$text;
?>

[NogDog]

One way:

$file = 'path/to/file.txt';
$lines = file($file);
$fifty = array_slice($lines, 0, 50);
file_put_contents($file, implode('', $fifty));

[jackL]

thanks for that answer 🙂
i'll try to get back to that project in the next couple of days and test it