CODEWITHSUNDEEP
phpnewlinefwritestrpos
Aneszej
Aneszej

Reputation: 83

PHP fwrite() how to insert a new line after some specific line

I'm new here.
Anyway, I did my research on fwrite(), but I couldn't find solution, so i'm asking for help. What I want is f.e. to add a new line of text after some other specific line. F.e. I have a .txt file in which there is: 

//Users

//Other stuff

//Other stuff2

Now what I'd like to do is be able to add a new user below //Users without touching "Other Stuff" and "Other Stuff 2". So it should look something like this: 

//Users    
Aneszej  
Test321  
Test123

//Other stuff

//Other stuff2

What I have so far:

$config = 'test.txt';
$file=fopen($config,"r+") or exit("Unable to open file!");

$date = date("F j, Y");
$time = date("H:i:s");

$username = "user";
$password = "pass";
$email = "email";
$newuser = $username . " " . $password . " " . $email . " " . $date . " " . $time;

while (!feof($file)) {
    $line=fgets($file);
    if (strpos($line, '//Users')!==false) {
        $newline = PHP_EOL . $newuser;
    }

}

fwrite($file, $newline);

fclose($file);

test.txt file

//Users

//Something Else

//Something Else 2

But this only writes users to the end of the .txt file.

Thanks a lot everyone for your help! It's solved.

Upvotes: 8

Views: 21866

Answers (4)

Ming M Zheng
Ming M Zheng

Reputation: 304

I modified your code, I think follows is what you need, and I also put comment, function below will keep adding new user, you can add condition that to check user exist. 

$config = 'test.txt';
$file=fopen($config,"r+") or exit("Unable to open file!");

$date = date("F j, Y");
$time = date("H:i:s");

$username = "user";
$password = "pass";
$email = "email";
$newuser = $username . " " . $password . " " . $email . " " . $date . " " .    $time."\r\n";   // I added new line after new user
$insertPos=0;  // variable for saving //Users position
while (!feof($file)) {
    $line=fgets($file);
    if (strpos($line, '//Users')!==false) { 
        $insertPos=ftell($file);    // ftell will tell the position where the pointer moved, here is the new line after //Users.
        $newline =  $newuser;
    } else {
        $newline.=$line;   // append existing data with new data of user
    }
}

fseek($file,$insertPos);   // move pointer to the file position where we saved above 
fwrite($file, $newline);

fclose($file);

Upvotes: 7

Markku K.
Markku K.

Reputation: 3908

You need to break after you find '//Users'. You keep reading to the end of the file.

Upvotes: 0

Hackerman
Hackerman

Reputation: 12305

Try fseek:

<?php
 $file = fopen($filename, "c");
 fseek($file, -3, SEEK_END);
 fwrite($file, "whatever you want to write");
 fclose($file);
?>

PHP Doc: http://php.net/manual/en/function.fseek.php

Upvotes: 0

flaschenpost
flaschenpost

Reputation: 2235

You write the new content at the end of the reading, so it has to write at the end of file - the cursor is there after reading all the lines.

Either you store all the content in php-variable and overwrite the file in the end, or you rewind the curser with fseek as mentioned by Robert Rozas comment. That should be done as soon as you read the "Something else" - line.

Upvotes: 0

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