我想将非WordPress管理员上传的图像尺寸限制为特定大小。我还想返回一个特定的错误反馈时，上传的图像不符合要求。
例如：如果我将限制设置为500px的宽度和700px的高度，如果用户尝试上载任何与我指定的宽度和高度不同的内容，它将被拒绝，并返回一条消息，说明图像大小应为500px×700px，仅jpg格式。
我找到了一个只需要最小尺寸的解决方案，但它离我想要的有点远(How to Require a Minimum Image Dimension for Uploading?).
我已添加@clayRay\'s建议，请帮助检查：
add_action( \'admin_init\', \'wpse_28359_block_authors_from_uploading_small_images\' );
function wpse_28359_block_authors_from_uploading_small_images()
{
if( !current_user_can( \'administrator\') )
add_filter( \'wp_handle_upload_prefilter\', \'wpse_28359_block_small_images_upload\' );
}
function wpse_28359_block_small_images_upload( $file )
{
// Mime type with dimensions, check to exit earlier
$mimes = array( \'image/jpeg\', \'image/png\', \'image/gif\' );
if( !in_array( $file[\'type\'], $mimes ) )
return $file;
$img = getimagesize( $file[\'tmp_name\'] );
$minimum = array( \'width\' => 500, \'height\' => 500 );
$maximum = array( \'width\' $maximum[\'width\'] )
$file[\'error\'] =
\'Image too large. Maximum width is \'
. $maximum[\'width\']
. \'px. Uploaded image width is \'
. $img[0] . \'px\';
elseif ( $img[1] > $maximum[\'height\'] )
$file[\'error\'] =
\'Image too large. Maximum height is \'
. $maximum[\'height\']
. \'px. Uploaded image height is \'
. $img[1] . \'px\';
return $file;
}
SO网友:clayRay
我修改了this answer 来自brasofilo。根据您的需要修改以下代码中以下行中的宽度和高度值。。。
$maximum = array( \'width\' => 500, \'height\' => 700 );
。。。然后将代码添加到主题的函数中。php文件。
add_action( \'admin_init\', \'wpse_371740_block_authors_from_uploading_large_images\' );
function wpse_371740_block_authors_from_uploading_large_images()
{
if( !current_user_can( \'administrator\') )
add_filter( \'wp_handle_upload_prefilter\', \'wpse_371740_block_large_images_upload\' );
}
function wpse_371740_block_large_images_upload( $file )
{
// Mime type with dimensions, check to exit earlier
$mimes = array( \'image/jpeg\', \'image/png\', \'image/gif\' );
if( !in_array( $file[\'type\'], $mimes ) )
return $file;
$img = getimagesize( $file[\'tmp_name\'] );
$maximum = array( \'width\' => 500, \'height\' => 700 );
if ( $img[0] > $maximum[\'width\'] )
$file[\'error\'] =
\'Image too large. Maximum width is \'
. $maximum[\'width\']
. \'px. Uploaded image width is \'
. $img[0] . \'px\';
elseif ( $img[1] > $maximum[\'height\'] )
$file[\'error\'] =
\'Image too large. Maximum height is \'
. $maximum[\'height\']
. \'px. Uploaded image height is \'
. $img[1] . \'px\';
return $file;
}
