modify file with php

[martabau]

i have these 2 functions:

Reading a Particular Line in a File

 

$line_counter = 0;

$desired_line = 29;

 

$fh = fopen('vacation-hotspots.txt','r') or die($php_errormsg);

while ((! feof($fh)) && ($line_counter <= $desired_line)) {

    if ($s = fgets($fh,1048576)) {

        $line_counter++;

    }

}

fclose($fh) or die($php_errormsg);

 

print $s;

 

AND:

 

Modifying a File in Place Without a Temporary File:

 

$fh = fopen('message.txt','r+')        or die($php_errormsg);

 

// figure out how many bytes to read

$bytes_to_read = filesize('message.txt');

 

// initialize variables that hold file positions

$next_read = $last_write = 0;

 

// keep going while there are still bytes to read

while ($next_read < $bytes_to_read) {

   

    /* move to the position of the next read, read a line, and save

    * the position of the next read */

    fseek($fh,$next_read);

    $s = fgets($fh,1048576)            or die($php_errormsg);

    $next_read = ftell($fh);

 

    // convert <b>word</b> to *word*

    $s = preg_replace('@<b[^>]*>(.*?)</b>@i','*$1*',$s);

    // convert <i>word</i> to /word/

    $s = preg_replace('@<i[^>]*>(.*?)</i>@i','/$1/',$s);

 

    /* move to the position where the last write ended, write the

    * converted line, and save the position for the next write */

    fseek($fh,$last_write);

    if (-1 == fwrite($fh,$s))            { die($php_errormsg); }

    $last_write = ftell($fh);

}

 

// truncate the file length to what we've already written

ftruncate($fh,$last_write)              or die($php_errormsg);

 

// close the file

fclose($fh)                            or die($php_errormsg);

 

both work well to read a specific line of the file and the other to replace a part of the file or all the file, could some one tell me a function to combine that i mean a function to replace part of a line or all the line of an opened file but just in the line that i want,

thanks a lot

[Brian W]

no one has replied cuz you need to put your code in [ code ] [ /code ] tags (without the spaces inside the []).

It makes reading the code easier.

[pinacoladaxb]

agree

[Brian W]

about 13 people have looked at this post and not actually replied with help while other posts all around it with more difficult and even less exciting questions get answered. I'll be honest, I haven't even read the first line of this guys code yet... lol