RewriteEngine On

RewriteRule ^([0-9]+);del$ del.php?id=$1
RewriteRule ^([0-9]+);send$ send.php?id=$1
RewriteRule ^user([0-9]+)$ index.php?id=$1
RewriteRule ^user([0-9]+)&search=(.*);page=([0-9]+)$ index.php?id=$1&search=$2$page=$3
RewriteRule ^user([0-9]+)&search=(.*)$ index.php?id=$1&search=$2

RewriteRule ^user([0-9]+);page=([0-9]+)$ index.php?id=$1&page=$2