PHP reads data from one TXT file, and writes the matching data to another TXT file.

PHP reads data from a TXT file. after matching, it writes data to another TXT file. I want to use PHP to read data from a TXT file. after matching, it writes data to another TXT file, I don't know what the problem is. after each execution, I only write the last one that meets the conditions (just one). I hope all the conditions are met. I hope you can give me some advice! & Lt ;? Php $ path = 'AA. tx PHP reads data from a TXT file and writes the matching data to another TXT file.
I want to use PHP to read data from a TXT file, and write the matching data to another TXT file. The following is the code and I don't know what the problem is, after each execution, only the last qualified (just one) will be written. I want all qualified, and hope you can give me some advice!


$ Path parameter 'aa.txt ';

$ Fp = fopen ($ path, "r ");


$ Str = file_get_contents ($ path); // Obtain the content
$ Arr = explode ("\ n", $ str); // store a branch to an array

Foreach ($ arr as $ row) // traverses each row
{
If (preg_match ("/^ ([a-zA-Z0-9 _\. \-]) + \ @ ([a-zA-Z0-9 \-]) + \.) + ([a-zA-Z0-9] {2, 4}) + $/", $ row )){
$ Path2 then 'bb.txt ';
$ Fp2 = fopen ($ path2, "");
Fwrite ($ fp2, $ row. "\ r \ n ");
Fclose ($ fp2 );
}
}
Fclose ($ fp );
?>

------ Solution --------------------
You can't see the problem from your code.

Didn't you just retrieve the email?

$ Str = file_get_contents ($ path); // Obtain the content
If (preg_match_all ("/^ ([a-zA-Z0-9 _\. \-]) + \ @ ([a-zA-Z0-9 \-]) + \.) + ([a-zA-Z0-9] {2, 4}) + $/m ", $ str, $ r )){
File_put_contents ('$ path2, join ("\ n", $ r [0]);
}

You can.
------ Solution --------------------

$ Arr = explode ("\ n", $ str );
Change
$ Arr = preg_split ('/[\ r \ n] +/', $ str );