function acf_validate_attachment($attachment, $field, $context = 'prepare')
{
// vars
$errors = array();
$file = array('type' => '', 'width' => 0, 'height' => 0, 'size' => 0);
// upload
if ($context == 'upload') {
// vars
$file['type'] = pathinfo($attachment['name'], PATHINFO_EXTENSION);
$file['size'] = filesize($attachment['tmp_name']);
if (strpos($attachment['type'], 'image') !== false) {
$size = getimagesize($attachment['tmp_name']);
$file['width'] = acf_maybe_get($size, 0);
$file['height'] = acf_maybe_get($size, 1);
}
// prepare
} elseif ($context == 'prepare') {
$file['type'] = pathinfo($attachment['url'], PATHINFO_EXTENSION);
$file['size'] = acf_maybe_get($attachment, 'filesizeInBytes', 0);
$file['width'] = acf_maybe_get($attachment, 'width', 0);
$file['height'] = acf_maybe_get($attachment, 'height', 0);
// custom
} else {
$file = wp_parse_args($file, $attachment);
}
// image
if ($file['width'] || $file['height']) {
// width
$min_width = (int) acf_maybe_get($field, 'min_width', 0);
$max_width = (int) acf_maybe_get($field, 'max_width', 0);
if ($file['width']) {
if ($min_width && $file['width'] < $min_width) {
// min width
$errors['min_width'] = sprintf(__('Image width must be at least %dpx.', 'acf'), $min_width);
} elseif ($max_width && $file['width'] > $max_width) {
// min width
$errors['max_width'] = sprintf(__('Image width must not exceed %dpx.', 'acf'), $max_width);
}
}
// height
$min_height = (int) acf_maybe_get($field, 'min_height', 0);
$max_height = (int) acf_maybe_get($field, 'max_height', 0);
if ($file['height']) {
if ($min_height && $file['height'] < $min_height) {
// min height
$errors['min_height'] = sprintf(__('Image height must be at least %dpx.', 'acf'), $min_height);
} elseif ($max_height && $file['height'] > $max_height) {
// min height
$errors['max_height'] = sprintf(__('Image height must not exceed %dpx.', 'acf'), $max_height);
}
}
}
// file size
if ($file['size']) {
$min_size = acf_maybe_get($field, 'min_size', 0);
$max_size = acf_maybe_get($field, 'max_size', 0);
if ($min_size && $file['size'] < acf_get_filesize($min_size)) {
// min width
$errors['min_size'] = sprintf(__('File size must be at least %s.', 'acf'), acf_format_filesize($min_size));
} elseif ($max_size && $file['size'] > acf_get_filesize($max_size)) {
// min width
$errors['max_size'] = sprintf(__('File size must must not exceed %s.', 'acf'), acf_format_filesize($max_size));
}
}
// file type
if ($file['type']) {
$mime_types = acf_maybe_get($field, 'mime_types', '');
// lower case
$file['type'] = strtolower($file['type']);
$mime_types = strtolower($mime_types);
// explode
$mime_types = str_replace(array(' ', '.'), '', $mime_types);
$mime_types = explode(',', $mime_types);
// split pieces
$mime_types = array_filter($mime_types);
// remove empty pieces
if (!empty($mime_types) && !in_array($file['type'], $mime_types)) {
// glue together last 2 types
if (count($mime_types) > 1) {
$last1 = array_pop($mime_types);
$last2 = array_pop($mime_types);
$mime_types[] = $last2 . ' ' . __('or', 'acf') . ' ' . $last1;
}
$errors['mime_types'] = sprintf(__('File type must be %s.', 'acf'), implode(', ', $mime_types));
}
}
// filter for 3rd party customization
$errors = apply_filters("acf/validate_attachment", $errors, $file, $attachment, $field);
$errors = apply_filters("acf/validate_attachment/type={$field['type']}", $errors, $file, $attachment, $field);
$errors = apply_filters("acf/validate_attachment/name={$field['name']}", $errors, $file, $attachment, $field);
$errors = apply_filters("acf/validate_attachment/key={$field['key']}", $errors, $file, $attachment, $field);
// return
return $errors;
}
function handle_upload_prefilter($file)
{
// bail early if no acf field
if (empty($_POST['_acfuploader'])) {
return $file;
}
// load field
$field = acf_get_field($_POST['_acfuploader']);
if (!$field) {
return $file;
}
// vars
$errors = array();
// image
if (strpos($file['type'], 'image') !== false) {
// vars
$size = getimagesize($file['tmp_name']);
$width = acf_maybe_get($size, 0);
$height = acf_maybe_get($size, 1);
// width
// * test if width exists to allow .svg to fail gracefully
if ($width) {
if (!empty($field['min_width']) && $width < $field['min_width']) {
// min width
$errors['min_width'] = sprintf(__('Image width must be at least %dpx.', 'acf'), $field['min_width']);
} elseif (!empty($field['max_width']) && $width > $field['max_width']) {
// min width
$errors['max_width'] = sprintf(__('Image width must not exceed %dpx.', 'acf'), $field['max_width']);
}
}
// height
if ($height) {
if (!empty($field['min_height']) && $height < $field['min_height']) {
// min height
$errors['min_height'] = sprintf(__('Image height must be at least %dpx.', 'acf'), $field['min_height']);
} elseif (!empty($field['max_height']) && $height > $field['max_height']) {
// min height
$errors['max_height'] = sprintf(__('Image height must not exceed %dpx.', 'acf'), $field['max_height']);
}
}
}
// file size
$filesize = filesize($file['tmp_name']);
if (!empty($field['min_size']) && $filesize < acf_get_filesize($field['min_size'])) {
// min width
$errors['min_size'] = sprintf(__('File size must be at least %s.', 'acf'), acf_format_filesize($field['min_size']));
} elseif (!empty($field['max_size']) && $filesize > acf_get_filesize($field['max_size'])) {
// min width
$errors['max_size'] = sprintf(__('File size must must not exceed %s.', 'acf'), acf_format_filesize($field['max_size']));
}
// file type
if (!empty($field['mime_types'])) {
$types = str_replace(array(' ', '.'), '', $field['mime_types']);
$types = explode(',', $types);
if (!in_array(pathinfo($file['name'], PATHINFO_EXTENSION), $types)) {
// glue together last 2 types
if (count($types) > 1) {
$last1 = array_pop($types);
$last2 = array_pop($types);
$types[] = $last2 . ' ' . __('or', 'acf') . ' ' . $last1;
}
$errors['mime_types'] = sprintf(__('File type must be %s.', 'acf'), implode(', ', $types));
}
}
// filter for 3rd party customization
$errors = apply_filters("acf/upload_prefilter", $errors, $file, $field);
$errors = apply_filters("acf/upload_prefilter/type={$field['type']}", $errors, $file, $field);
$errors = apply_filters("acf/upload_prefilter/name={$field['name']}", $errors, $file, $field);
$errors = apply_filters("acf/upload_prefilter/key={$field['key']}", $errors, $file, $field);
// append error
if (!empty($errors)) {
$file['error'] = implode("\n", $errors);
}
// return
return $file;
}