funtions.php

Hi.
Can I add this code to functions.php to place ALT attributes on the images? Or can you create some incompatibility ??
Thank you.

function add_alt_tags( $content ) {
preg_match_all( ‘//’, $content, $images );
if ( ! is_null( $images ) ) {
foreach ( $images[1] as $index => $value ) {
if ( preg_match( ‘/alt=””/’, $value ) ) {
$new_img = str_replace(
‘alt=””‘,
‘alt=”‘ . esc_attr( get_the_title() ) . ‘ ‘. $index . ‘”‘,
$images[0][$index] );
$content = str_replace(
$images[0][$index],
$new_img,
$content );
}
}
}
return $content;
}
add_filter( ‘the_content’, ‘add_alt_tags’, 99999 );