Fill Missing Alt Text From the File Name
When an image is uploaded without alt text, creates one from its title (based on the file name), replacing dashes and underscores with spaces.
Opens WPIDE on
Code
add_action( 'add_attachment', function ( $attachment_id ) {
if ( ! wp_attachment_is_image( $attachment_id ) ) {
return;
}
if ( '' !== (string) get_post_meta( $attachment_id, '_wp_attachment_image_alt', true ) ) {
return;
}
$alt = trim( preg_replace( '/[\s_-]+/', ' ', (string) get_the_title( $attachment_id ) ) );
if ( '' !== $alt ) {
update_post_meta( $attachment_id, '_wp_attachment_image_alt', sanitize_text_field( ucfirst( $alt ) ) );
}
} );Notes
Generated alt text is only as good as the file name. Review it for important images.
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