deleting matches from text file in php - php

Question

Consider a txt file of a list of items
qqqqqq
eeeeee
dddddd
hhhhhh
dddddd
hhhhhh
999999
And some of the items in the list are duplicates. how do I output a using php a text file where anything that is duplicated is removed.
the result:
qqqqqq
eeeeee
999999

Answer 1

You can use array_unique
and then right the content back
$file = fopen("filename.txt", "r");
$members = array();
while (!feof($file)) {
$members[] = fgets($file);
}
fclose($file);
$unique_members = array();
$unique_members = array_unique($members);
var_dump($unique_members);
//write the content back to the file
The above solution was for removing the duplicates only and make them unique. Thanks to nhahtdh for pointing it out.
$count_members = array_count_values($members);
foreach($count_members as $key=>$value)
{
if($value == 1)
//write it to the file
}
So you will not need the array_unique stuff
Sorry again

Answer 2

<?php
$file = file_get_contents('file.txt'); //get file to string
$row_array = explode("\n",$file); //cut string to rows by new line
$row_array = array_count_values(array_filter($row_array));
foreach ($row_array as $key=>$counts) {
if ($counts==1)
$no_duplicates[] = $key;
}
//do what You want
echo '<pre>';
print_r($no_duplicates);
file_put_contents('no_duplicates.txt',$no_duplicates); //write to file. If file don't exist. Create it.