CODEWITHSUNDEEP
php
bigg blogger
bigg blogger

Reputation: 9

PHP - How to write a line in text file if line already available in file then count the request

I want to write a PHP code which write a string line in text file if the line already available in text file then count the requests for example text file contain:

red.apple:1
big.orange:1
green.banana:1

If some one request to add big.orange in file if its already available in file then count as big.orange:2 if not available then write new line big.orange:1

after execution code text file

    red.apple:1
    big.orange:2
    green.banana:1

I've written the following code but not working.

<?PHP
$name = $_GET['fname']

$file = fopen('request.txt', "r+") or die("Unable to open file!");

if ($file) {
    while (!feof($file)) {
        $entry_array = explode(":",fgets($file));
        if ($entry_array[0] == $name) {
            $entry_array[1]==$entry_array[1]+1;
            fwrite($file, $entry_array[1]);
        }
    }
    fclose($file);
}    
else{
    fwrite($file, $name.":1"."\n");
    fclose($file);
}
?>

Upvotes: 0

Views: 65

Answers (2)

Noobus
Noobus

Reputation: 96

If you still need to use this format (like, this is some exam test or legacy), try the function:

     function touchFile($file, $string) {
        if (!file_exists($file)) {
            if (is_writable(dirname($file))) {
                // create file (later)
                $fileData = "";
            } else {
                throw new ErrorException("File '".$file."' doesn't exist and cannot be created");
            }
        } else $fileData = file_get_contents($file);
        if (preg_match("#^".preg_quote($string).":(\d+)\n#m", $fileData, $args)) {
            $fileData = str_replace($args[0], $string.":".(intval($args[1])+1)."\n", $fileData);
        } else {
            $fileData .= $string.":1\n";
        }
        if (file_put_contents($file, $fileData)) {
            return true;
        } else {
            return false;
        }
    }

Upvotes: 0

M. Eriksson
M. Eriksson

Reputation: 13635

Instead of creating your own format which you need to parse manually, you can simply use json.

Below is a suggestion about how it would work. It will add the requested fname value if it doesn't already exist and will also create the file if it doesn't already exists.

$name = $_GET['fname'] ?? null;

if (is_null($name)) {
    // The fname query param is missing so we can't really continue
    die('Got no name');
}

$file = 'request.json';

if (is_file($file)) {
    // The file exists. Load it's content
    $content = file_get_contents($file);

    // Convert the contents (stringified json) to an array
    $data = json_decode($content, true);
} else {
    // The file does not extst. Create an empty array we can use
    $data = [];
}

// Get the current value if it exists or start with 0
$currentValue = $data[$name] ?? 0;

// Set the new value
$data[$name] = $currentValue + 1;

// Convert the array to a stringified json object
$content = json_encode($data);

// Save the file
file_put_contents($file, $content);

Upvotes: 2

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