Question

I have file to edit that contains:

Categories,
Diamond,10,11,
Coal,21,21,

How to add string at the end of line containing “Diamond”?

What I have is code that can add string at the end of a file but don’t know how to make it to add that string in specyfic line:

$function_Result = mysql_fetch_row($function_Ask, 0);

$file_To_Edit = "item_Data.csv";
$opened_File = fopen($file_To_Edit, 'w') or die("Error. Code:2 - Can not open file $file_To_Edit");

$string_Data = $function_Result[0] . ",";
fwrite($opened_File, $string_Data);
fclose($opened_File);

Answer 1

I should have used an preg_replace if the file content isn’t too large.

$content = file_get_contents('file.txt');
/* in case of unwanted \r */ $content = str_replace("\r", '', $content);
$content = preg_replace("#^(Diamond.*)$#m", '$1' . $append, $content);
file_put_contents('file.txt', $content);