line_count

Created by LetsSurf, last update on 26/02/2008 17:32

trying to work out the line count on extremly large text file can't be done by simple str_count for line breaks as you can't load the entire file into memory. this function hopfully helps with that.

$fp = fopen('php://temp', 'w+');
$content = "Line1\nLine2\nLine3\n";
fwrite($fp, $content);
 
echo line_count($fp);
 
function line_count($fp) {
    if (is_resource($fp) && (get_resource_type($fp) == 'file' ||
get_resource_type($fp) == 'stream')) {
        $fpos = ftell($fp);
        rewind($fp);
        $bufferSize = 8192;
        $newLine    = null;
        while(is_null($newLine) && !feof($fp)) {
            $buffer = fread($fp, $bufferSize);
            if (strpos($buffer, "\n") !== false) {
                $newLine = "\n";
            } else if(strpos($buffer, "\r") !== false)  {
                $newLine = "\r";
            }
        }
        if (is_null($newLine)) {
            return 0;
        }
        $i = substr_count($buffer, $newLine);
        while (!feof($fp)) {
            $buffer = fread($fp, $bufferSize);
            $i += substr_count($buffer, $newLine);
        }
        fseek($fp, $fpos);
        return $i;
    } else {
        throw new Exception('invalid file handle as parameter');
    }
}

Dependencies

No special requirements are needed by this snippet

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