php filesize（）始终返回相同的值

我正在尝试通过PHP上传图像。在上传时，应该调整其大小，使其“维度”与我在配置[]-数组中定义的维度一样大，并且其“文件大小”也小于或等于配置[]-数组中的预定义值。但是无论如何，getFileSize方法总是返回相同的大小，即使在调整图像大小之后也是如此

这是我的密码。解释如下

$tries = 0;
while ( $image->getFileSize() > $config['image_max_file_size'] && $tries < 10 ) {
    $factor = 1 - (0.1 * $tries);

    echo $image->getFileSize().PHP_EOL;
    if ( !$image->resize($config['image_max_width'], $config['image_max_height'], $factor) ) {
            return false;
    }

    $tries++;
}

谢谢

试试看

试一试

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clearstatcache-谢谢：P实际上你是第一个，但不能接受这个答案：Sclearstatcache-谢谢：P实际上你是第一个，但不能接受这个答案：S

function resize($neededwidth, $neededheight, $factor) {

    $oldwidth = $this->getWidth($this->file_path);
    $oldheight = $this->getHeight($this->file_path);
    $neededwidth = $neededwidth * $factor;
    $neededheight = $neededheight * $factor;
    $fext = $this->getInnerExtension();

    $img = null;
    if ($fext == ".jpeg" ) {
        $img = imagecreatefromjpeg($this->file_path);
    } elseif ($fext == ".png") {
        $img = imagecreatefrompng($this->file_path);
    } elseif ($fext == ".gif") {
        $img = imagecreatefromgif($this->file_path);
    } else {
        return false;
    }

    $newwidth = 0;
    $newheight = 0;
    if ($oldwidth > $oldheight && $oldwidth > $neededwidth) { // Landscape Picture
        $newwidth = $neededwidth;
        $newheight = ($oldheight / $oldwidth) * $newwidth;      
    } elseif ($oldwidth < $oldheight && $oldheight > $neededheight) { // Portrait Picture
        $newheight = $neededheight;
        $newwidth = ($oldwidth / $oldheight) * $newheight;
    }

    $finalimg = imagecreatetruecolor($newwidth,$newheight);
    imagecopyresampled($finalimg, $img, 0, 0, 0, 0, $newwidth, $newheight, $oldwidth, $oldheight);

    if ($fext == ".jpeg" ) {
        if ( !imagejpeg($finalimg, $this->file_path, 100) ) return false;
    } elseif ($fext == ".png") {
        if ( !imagepng($finalimg, $this->file_path, 9) ) return false;
    } elseif ($fext == ".gif") {
        if ( !imagegif($finalimg, $this->file_path) ) return false;
    } else {
        return false;
    }

    imagedestroy($img);
    return true;
}

function getFileSize() {

        return filesize($this->file_path);
}

function getFileSize() {
    clearstatcache();
    return filesize($this->file_path);
}