Artikel-Schlagworte: „Textcounter in PHP“

Eine Routine zum Entfernen doppelter Zeilen

/**
 * RemoveDuplicatedLines
 * This function removes all duplicated lines of the given text file.
 *
 * @param     string
 * @param     bool
 * @return    string
 */
function RemoveDuplicatedLines($Filepath, $IgnoreCase=false, $NewLine="\n"){

    if (!file_exists($Filepath)){
        $ErrorMsg  = 'RemoveDuplicatedLines error: ';
        $ErrorMsg .= 'The given file ' . $Filepath . ' does not exist!';
        die($ErrorMsg);
    }

    $Content = file_get_contents($Filepath);

    $Content = RemoveDuplicatedLinesByString($Content, $IgnoreCase, $NewLine);

    // Is the file writeable?
    if (!is_writeable($Filepath)){
        $ErrorMsg  = 'RemoveDuplicatedLines error: ';
        $ErrorMsg .= 'The given file ' . $Filepath . ' is not writeable!';
        die($ErrorMsg);
    }

    // Write the new file
    $FileResource = fopen($Filepath, 'w+');
    fwrite($FileResource, $Content);
    fclose($FileResource);
}

/**
 * RemoveDuplicatedLinesByString
 * This function removes all duplicated lines of the given string.
 *
 * @param     string
 * @param     bool
 * @return    string
 */
function RemoveDuplicatedLinesByString($Lines, $IgnoreCase=false, $NewLine="\n"){

    if (is_array($Lines))
        $Lines = implode($NewLine, $Lines);

    $Lines = explode($NewLine, $Lines);

    $LineArray = array();

    $Duplicates = 0;

    // Go trough all lines of the given file
    for ($Line=0; $Line < count($Lines); $Line++){

        // Trim whitespace for the current line
        $CurrentLine = trim($Lines[$Line]);

        // Skip empty lines
        if ($CurrentLine == '')
            continue;

        // Use the line contents as array key
        $LineKey = $CurrentLine;

        if ($IgnoreCase)
            $LineKey = strtolower($LineKey);

        // Check if the array key already exists,
        // if not add it otherwise increase the counter
        if (!isset($LineArray[$LineKey]))
            $LineArray[$LineKey] = $CurrentLine;
        else
            $Duplicates++;
    }

    // Sort the array
    asort($LineArray);

    // Return how many lines got removed
    return implode($NewLine, array_values($LineArray));
}

Quelle: Johnas John

Mit den folgenden paar Zeilen kann man einen sehr einfachen Textcounter ohne Reloadsperre realisieren. Dazu wird der Code einfach dort in der Seite platziert, wo der Counter angezeigt werden soll.

<?php
$counterdatei = "counter.txt";
$datei = file($counterdatei);
$counter = $datei[0] + 1;
$handle = fopen($dateiname, "w");
fwrite($handle, $counter);
fclose($handle);
// Ausgabe der Counters
echo $counter." Besucher";
?>

Der Counterstand wird in die Datei counter.txt geschrieben.