我怎样才能在php中对文本文件进行排序

Question

english, lang1, lang2
rat, rat_lang1, rat_lang2
ball, ball_lang1, ball_lang2
air, air_lang1, air_lang2

If I have this text file I read in php, how can I sort it starting the second line, the first line being the heading of the file. So that the file will print out like..

english....
air....
ball...
rat....

I read the file using fopen, put it in $content using fread, used explode with new line. I can see the array of lines but cannot figure out how to sort it. Any suggestions would be appreciated.

Answer 1

Much of this solution was answered within the comments in response to your question. All put together you're looking for something like:

<?php
$f = file("text.txt"); //read the text file into an array
$newf = fopen("newtext.txt", "w+"); //open another file
$header = $f[0]; //store the first element of the array as $header
echo $header."<br>"; //and echo the header
fwrite($newf, $header); //write the header to the new file
array_shift($f); //then remove the first element of the array i.e. the header
sort($f); //sort the array (no flag param = alphabetical sort)
foreach($f as $line){ //loop through the sorted array
    echo $line."<br>"; //print each element as it's own line
    fwrite($newf, trim($line)."
"); //write other elements to new file on own line
}
fclose($newf); //close the file
?>