有人能帮我编辑代码吗。代码似乎正常工作，但有一个问题，当我在wordpress中添加新插件时，它会提示错误。此代码警报/错误应仅存在于媒体库中，但它似乎也会影响插件页（管理员）。谢谢你

<?php 
/* Marc Dingena Utilities
 * Test image resolution before image crunch
 */
add_filter(\'wp_handle_upload_prefilter\',\'mdu_validate_image_size\');
function mdu_validate_image_size( $file ) {
    $image = getimagesize($file[\'tmp_name\']);
    $minimum = array(
        \'width\' => \'400\',
        \'height\' => \'400\'
    );
    $maximum = array(
        \'width\' => \'2000\',
        \'height\' => \'2000\'
    );
    $image_width = $image[0];
    $image_height = $image[1];

    $too_small = "Image dimensions are too small. Minimum size is {$minimum[\'width\']} by {$minimum[\'height\']} pixels. Uploaded image is $image_width by $image_height pixels.";
    $too_large = "Image dimensions are too large. Maximum size is {$maximum[\'width\']} by {$maximum[\'height\']} pixels. Uploaded image is $image_width by $image_height pixels.";

    if ( $image_width < $minimum[\'width\'] || $image_height < $minimum[\'height\'] ) {
        // add in the field \'error\' of the $file array the message 
        $file[\'error\'] = $too_small; 
        return $file;
    }
    elseif ( $image_width > $maximum[\'width\'] || $image_height > $maximum[\'height\'] ) {
        //add in the field \'error\' of the $file array the message
        $file[\'error\'] = $too_large; 
        return $file;
    }
    else
        return $file;
}
?>

function mdu_validate_image_size( $file ) {
    $image = getimagesize($file[\'tmp_name\']);
    if(@!is_array(getimagesize($image))){
     $image = true;
    }
    else {
    $image = false;
    }

    $minimum = array(
        \'width\' => \'250\',
        \'height\' => \'180\'
    );
    $maximum = array(
        \'width\' => \'250\',
        \'height\' => \'180\'
    );
    $image_width = $image[0];
    $image_height = $image[1];

    $too_small = "Image dimensions are too small. Minimum size is {$minimum[\'width\']} by {$minimum[\'height\']} pixels. Uploaded image is $image_width by $image_height pixels.";
    $too_large = "Image dimensions are too large. Maximum size is {$maximum[\'width\']} by {$maximum[\'height\']} pixels. Uploaded image is $image_width by $image_height pixels.";

    if ( $image_width < $minimum[\'width\'] || $image_height < $minimum[\'height\'] ) {
        // add in the field \'error\' of the $file array the message 
        $file[\'error\'] = $too_small; 
        return $file;
    }
    elseif ( $image_width > $maximum[\'width\'] || $image_height > $maximum[\'height\'] ) {
        //add in the field \'error\' of the $file array the message
        $file[\'error\'] = $too_large; 
        return $file;
    }
    else
        return $file;
}