Adding content to a specific line in file

Normo · 10-09-2008, 08:52 AM

I'm relatively new to PHP so bare with me.I'm trying to replace a specific line to a file. This is my code so far:

PHP Code:


			
$string = "Blah blah blah

<!-- comment -->";

$file = fopen("file.txt", "r"); // Open file



if($file){

while(!feof($file)){  // Before end of file

$read = fgets($file, 1000);  // read line

if ($read=="<!-- comment -->"){ // if right line

$read = $string; // change to variable

}}

fclose($file);

}

I'm unable to test this at the moment, so if someone could check this and/or suggest anything better that would be helpful.

Cheers.

sketchMedia · 10-09-2008, 09:27 AM

Half way there, at the moment your script should read each line, but it wont write to file.
How about this:

PHP Code:


			
<?php
$szFile= 'file.txt'; // File we want to manipulate
$szFind = '<!-- comment -->'; // Our search
$szReplace = "Blah blah blah\r\n<!-- comment -->"; // Our replace string

$szFileText = file_get_contents($szFile); // Get file the files contents
$pFh = fopen($szFile, 'w+'); // Open a file handle
$szFileText = str_replace($szFind, $szReplace, $szFileText); // Do string replace
fwrite($pFh, $szFileText); // Write text to file
fclose($pFh); //Close handle

Normo · 10-09-2008, 02:48 PM

Ah thanks boy, that works a treat!

Tanax · 10-09-2008, 04:43 PM

Here's a function for this. Haven't tested, but should work.
Pretty easy to use as the following example:

PHP Code:


			
$bReplace = file_intersperse_contents('file.txt', 'This is our replaced text', 'replace me');

if($bReplace) {

    echo 'File has successfully been edited';

}

else {

    echo 'File could not be changed, check your permissions';

}

Function:

php Code:

/**
  * Function file_intersperse_contents
  * Params $szFilename, $szInject, $szFind
  *
  * Replaces text in a file after the specified startingpoint
  * Returns true or false
**/
function file_intersperse_contents($szFilename, $szInject, $szFind) {
        
    // Check if file exist
    if(file_exists($szFilename)) {
            
        // If file exist
        // Get the content
        $szContent = file_get_contents($szFilename);
        
        // Replace the text
        $szReplace = str_replace($szFind, $szInject, $szContent);
        
        // Open the file
        $szFile = fopen($szFilename, 'w+');
        
        // Write the text into it
        $bWrite = fwrite($szFile, $szReplace);

        if($bWrite) {
            
            // If success, close file and return true
            fclose($szFile);
            return true;
            
        }
        
        // If failure, close file and return false
        fclose($szFile);
        return false;

    }

    else {

        die('File' . $szFilename . 'does not exist!');

    }

}

Wildhoney · 10-09-2008, 06:22 PM

I knew I had written a function with the exact same name! Thief

Tanax · 10-09-2008, 11:20 PM

Yea, it was a great function, I'm still using it! However I had to modify it for this cause though. Sorry xD